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Processability Improvement and Control through bi-modal VistamaxxTM performance polymers

IP.com Disclosure Number: IPCOM000247667D
Publication Date: 2016-Sep-26

Publishing Venue

The IP.com Prior Art Database

Abstract

Improvement of extrusion processability is always desired by polymer industry. And one of the key indicators in evaluating polymer's extrusion processability is torque. It represents energy consumed during extrusion process for transportation and homogenization of polymer materials. Low torque is often desired by compounders and fabricators to reduce material processing cost. In addition to torque, melt strength and shear thinning are also used by fabricators in measuring polymer processability during fabrication process. However, unlike torque, desired performance varies between fabrication techniques. To improve extrusion processability, a bi-modal VistamaxxTM performance polymers were developed through physical blending of low viscosity Vistamaxx polymer and high viscosity Vistamaxx polymer. The effect of low viscosity Vistamaxx polymer grade and content to extrusion processability, fabrication processability and mechanical properties are evaluated. At low viscosity Vistamaxx polymer content below 45wt%, especially around 15wt%, extrusion processability of blend was significantly improved with increasing low viscosity Vistamaxx polymer content while fabrication processability and mechanical properties are largely maintained. At low viscosity Vistamaxx polymer content higher than 45wt%, extrusion processability continue to improve with increasing low viscosity Vistamaxx polymer content regardless of low viscosity Vistamaxx polymer grade being used. Fabrication processability, stiffness and toughness are significantly impacted by both low viscosity Vistamaxx polymer grade and content used. Through this work, it had been demonstrated that introducing low viscosity Vistamaxx polymer is an effective way for improving extrusion processability of high viscosity Vistamaxx while maintaining fabrication processability and mechanical properties.

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Processability Improvement and Control through bi-modal VistamaxxTM performance polymers

Abstract:

Improvement of extrusion processability is always desired by polymer industry. And one of the key indicators in evaluating polymer's extrusion processability is torque. It represents energy consumed during extrusion process for transportation and homogenization of polymer materials. Low torque is often desired by compounders and fabricators to reduce material processing cost. In addition to torque, melt strength and shear thinning are also used by fabricators in measuring polymer processability during fabrication process. However, unlike torque, desired performance varies between fabrication techniques.

To improve extrusion processability, a bi-modal VistamaxxTM performance polymers were developed through physical blending of low viscosity Vistamaxx polymer and high viscosity Vistamaxx polymer. The effect of low viscosity Vistamaxx polymer grade and content to extrusion processability, fabrication processability and mechanical properties are evaluated.

At low viscosity Vistamaxx polymer content below 45wt%, especially around 15wt%, extrusion processability of blend was significantly improved with increasing low viscosity Vistamaxx polymer content while fabrication processability and mechanical properties are largely maintained. At low viscosity Vistamaxx polymer content higher than 45wt%, extrusion processability continue to improve with increasing low viscosity Vistamaxx polymer content regardless of low viscosity Vistamaxx polymer grade being used. Fabrication processability, stiffness and toughness are significantly impacted by both low viscosity Vistamaxx polymer grade and content used.

Through this work, it had been demonstrated that introducing low viscosity Vistamaxx polymer is an effective way for improving extrusion processability of high viscosity Vistamaxx while maintaining fabrication processability and mechanical properties.

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