http://www.dspace.cam.ac.uk:80/handle/1810/196407 Fri, 24 May 2013 16:18:44 GMT 2013-05-24T16:18:44Z http://www.dspace.cam.ac.uk:80/handle/1810/198310 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 4.4mm/s, 175C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 4.4 mm/s at 175C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 175 degrees celsius, Piston speed = 4.4mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Fri, 05 Sep 2008 14:24:39 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198310 2008-09-05T14:24:39Z http://www.dspace.cam.ac.uk:80/handle/1810/198309 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 1.32mm/s, 175C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 1.32 mm/s at 175C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 175 degrees celsius, Piston speed = 1.32mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Fri, 05 Sep 2008 14:16:34 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198309 2008-09-05T14:16:34Z http://www.dspace.cam.ac.uk:80/handle/1810/198308 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 2.64mm/s, 175C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 2.64 mm/s at 175C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 175 degrees celsius, Piston speed = 2.64mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Fri, 05 Sep 2008 14:08:45 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198308 2008-09-05T14:08:45Z http://www.dspace.cam.ac.uk:80/handle/1810/198307 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 2.2mm/s, 175C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 2.2 mm/s at 175C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 175 degrees celsius, Piston speed = 2.2mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Fri, 05 Sep 2008 14:05:20 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198307 2008-09-05T14:05:20Z http://www.dspace.cam.ac.uk:80/handle/1810/198306 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 2.2mm/s, 155C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 2.2 mm/s at 155C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 155 degrees celsius, Piston speed = 2.2mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Fri, 05 Sep 2008 14:02:03 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198306 2008-09-05T14:02:03Z http://www.dspace.cam.ac.uk:80/handle/1810/198305 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 1.76mm/s, 175C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 1.76 mm/s at 175C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 175 degrees celsius, Piston speed = 1.76mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Fri, 05 Sep 2008 13:58:23 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198305 2008-09-05T13:58:23Z http://www.dspace.cam.ac.uk:80/handle/1810/198304 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 1.76mm/s, 155C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 1.76 mm/s at 155C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 155 degrees celsius, Piston speed = 1.76mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Fri, 05 Sep 2008 13:55:09 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198304 2008-09-05T13:55:09Z http://www.dspace.cam.ac.uk:80/handle/1810/198302 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 1.32mm/s, 155C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 1.32 mm/s at 155C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 155 degrees celsius, Piston speed = 1.32mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Fri, 05 Sep 2008 13:23:45 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198302 2008-09-05T13:23:45Z http://www.dspace.cam.ac.uk:80/handle/1810/198301 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 0.88mm/s, 175C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 0.88 mm/s at 175C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 175 degrees celsius, Piston speed = 0.88mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Fri, 05 Sep 2008 11:12:40 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198301 2008-09-05T11:12:40Z http://www.dspace.cam.ac.uk:80/handle/1810/198300 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 0.88mm/s, 155C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 0.88 mm/s at 155C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 155 degrees celsius, Piston speed = 0.88mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Fri, 05 Sep 2008 11:09:20 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198300 2008-09-05T11:09:20Z http://www.dspace.cam.ac.uk:80/handle/1810/198298 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 0.44mm/s, 175C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 0.44 mm/s at 175C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 175 degrees celsius, Piston speed = 0.44mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Thu, 04 Sep 2008 15:58:06 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198298 2008-09-04T15:58:06Z http://www.dspace.cam.ac.uk:80/handle/1810/198297 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 0.44mm/s, 155C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 0.44 mm/s at 155C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 155 degrees celsius, Piston speed = 0.44mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Thu, 04 Sep 2008 15:51:50 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198297 2008-09-04T15:51:50Z http://www.dspace.cam.ac.uk:80/handle/1810/198296 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 0.22mm/s, 175C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 0.22 mm/s at 175C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 175 degrees celsius, Piston speed = 0.22mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Thu, 04 Sep 2008 15:44:59 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198296 2008-09-04T15:44:59Z http://www.dspace.cam.ac.uk:80/handle/1810/198295 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 0.22mm/s, 155C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 0.22 mm/s at 155C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 155 degrees celsius, Piston speed = 0.22mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Thu, 04 Sep 2008 15:39:48 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198295 2008-09-04T15:39:48Z http://www.dspace.cam.ac.uk:80/handle/1810/198294 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 0.088mm/s, 175C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 0.088 mm/s at 175C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 175 degrees celsius, Piston speed = 0.088mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Thu, 04 Sep 2008 15:34:54 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198294 2008-09-04T15:34:54Z http://www.dspace.cam.ac.uk:80/handle/1810/198293 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 0.088mm/s, 155C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 0.088 mm/s at 155C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 155 degrees celsius, Piston speed = 0.088mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Thu, 04 Sep 2008 15:30:56 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198293 2008-09-04T15:30:56Z http://www.dspace.cam.ac.uk:80/handle/1810/198292 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 0.044mm/s, 175C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 0.044 mm/s at 175C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 175 degrees celsius, Piston speed = 0.044mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible), Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Thu, 04 Sep 2008 14:40:30 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198292 2008-09-04T14:40:30Z http://www.dspace.cam.ac.uk:80/handle/1810/198291 Title: HDPE (CM1) optical birefringence pattern in cross-slot flow, piston speed 0.044mm/s, 155C Authors: Hassell, David Abstract: The optical birefringence pattern obtained from lightly branched high density polyethyene (HDPE - produced by metallocene catalysis polymerisation) flowing in a cross-slot multi-pass rheometer cell. Experiment carried out on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 0.044 mm/s at 155C. The geometry generates a flow field with an extensional component at the centreline. If the no slip condition at a solid surface is satisfied, the side walls are high shear rate regions. The experiments were carried out to evaluate the material behaviour in extensional flow. At low extensional rates, an almost Newtonian stress profile is exhibited. Description: Conditions: Material = HDPE CM1, Mw=104kg/mol, Mn=50.2kg/mol, Polydipersity=2.07, Temperature = 155 degrees celsius, Piston speed = 0.044mm/s, Width of flow channels = 1.5mm, depth of sample = 10mm (hence 2D flow approximation is possible),Back pressure in the side arms = 5bar. For further details see:Hassell DG, Auhl D, McLeish TCB and Mackley MR, The effect of viscoelasticity on stress fields within polyethylene melt flow for a cross-slot contraction-expansion slit geometry, Rheologica Acta, 47, 821-834 (2008) Thu, 04 Sep 2008 11:11:17 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198291 2008-09-04T11:11:17Z http://www.dspace.cam.ac.uk:80/handle/1810/198281 Title: Polystyrene PS648 outlet optical birefringence pattern, piston speed 1.4mm/s Authors: Hassell, David Abstract: The optical birefringence pattern obtained from polystyrene PS648 flowing through a narrow slit. Experiment conducted on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 1.4 mm/s at 170C. Video shows the outlet flow (from top to bottom). Description: Conditions: Material=DOW polystyrene PS648, Mw~333kg/mol, polydispersity~2.0, Temperature=170 degrees celsius, Piston speed=1.40mm/s, slit width=0.6mm, slit length=8mm, slit depth=10mm Wed, 27 Aug 2008 16:16:25 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198281 2008-08-27T16:16:25Z http://www.dspace.cam.ac.uk:80/handle/1810/198280 Title: Polystyrene PS648 inlet optical birefringence pattern, piston speed 1.4mm/s Authors: Hassell, David Abstract: The optical birefringence pattern obtained from polystyrene PS648 flowing through a narrow slit. Experiment conducted on the Cambridge Multi Pass Rheometer (MPR4) at a piston speed of 1.4 mm/s at 170C. Video shows the inlet flow (from bottom to top). Description: Conditions: Material=DOW polystyrene PS648, Mw~333kg/mol, polydispersity~2.0, Temperature=170 degrees celsius, Piston speed=1.40mm/s, slit width=0.6mm, slit length=8mm, slit depth=10mm Wed, 27 Aug 2008 16:11:36 GMT http://www.dspace.cam.ac.uk:80/handle/1810/198280 2008-08-27T16:11:36Z