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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received November 28, 2017
Accepted April 23, 2018

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Effects of Molecular Weight of PC on Mechanical Properties of PC/ABS Blends using High-Shear Rate Processing

Eun Ju Lee Hee Jung Park¹ Se Mi Kim Seung Goo Lee² Kee Yoon Lee^†

Department of Polymer Science and Engineering, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea ¹Western Seoul Center Korea Basic Science Institute, 150, Bugahyeon-ro, Seodaemun-gu, Seoul, 03759, Korea ²Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea

Korean Chemical Engineering Research, June 2018, 56(3), 343-348(6), 10.9713/kcer.2018.56.3.343 Epub 4 June 2018

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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 of1000 rpm.

Keywords

High-shear rate processing Molecular weight of PC PC/ABS Mechanical properties Tensile strength Elongation

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