Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Effects of Molecular Weight of PC on Mechanical Properties of PC/ABS Blends using High-Shear Rate Processing

  • Lee, Eun Ju (Department of Polymer Science and Engineering, Chungnam National University) ;
  • Park, Hee Jung (Western Seoul Center Korea Basic Science Institute) ;
  • Kim, Se Mi (Department of Polymer Science and Engineering, Chungnam National University) ;
  • Lee, Seung Goo (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University) ;
  • Lee, Kee Yoon (Department of Polymer Science and Engineering, Chungnam National University)
  • Received : 2017.11.28
  • Accepted : 2018.04.23
  • Published : 2018.06.01
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Abstract

Each of the two polycarbonates (PC) of different molecular weights was blended with acrylonitrile-butadiene-styrene (ABS) under high-shear rate processing to afford PC/ABS. Sizes of ABS dispersed phases and mechanical properties of PC/ABS blends were investigated and high-shear rate processing of PC/ABS was carried out by changing screw speed and processing time. Prepared specimens were examined by scanning electron microscope (SEM) to observe morphology changes. Sizes of ABS dispersed phases in PC/ABS blends were observed to decrease gradually as screw speeds increased. Tensile strengths and elongations of specimens were investigated by universal testing method (UTM) to study the influence of molecular weight of PC exerting on PC/ABS blends. As a result, PC1/ABS blends (PC1: higher molecular weight PC) exhibited more strengthened properties than PC2/ABS (PC2: lower molecular weight PC). The tensile strength of PC1/ABS showed an increasing tendency when the screw speed increased, and the elongation did not show a significant decrease, but increased slightly with increasing shear time at a constant screw speed of 1000 rpm.

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