Journal
POLYMER
Volume 170, Issue -, Pages 135-141Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2019.03.015
Keywords
Viscoelasticity; Capillary flow; Polymer blend
Categories
Funding
- JSPS [16H04201, 18J12283]
- Grants-in-Aid for Scientific Research [18J12283] Funding Source: KAKEN
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The shear viscosity of binary blends comprising polycarbonate (PC) and low-molecular-weight polystyrene (LPS) was examined. It was found that the viscosity of PC significantly decreases by the addition of L-PS. Although the dynamic mechanical properties indicated that L-PS is immiscible with PC, the morphology observation of the extruded strand clarified that shear-induced phase-mixing occurs. Furthermore, the viscosity decrease was found to be pronounced in the high shear stress condition, which is much more obvious than that by the addition of low-molecular-weight PC. Consequently, the addition of L-PS improves the flowability at injection-molding greatly.
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