Melt flow properties, mechanical properties, thermal properties and morphology of polycarbonate/highly branched polystyrene blends

A highly branched polystyrene (HBPS) was synthesized via the copolymerization of 4‐(chloromethyl) styrene with styrene using the self‐condensing atom transfer radical polymerization method. The addition of HBPS as a melt modifier for polycarbonate (PC) was attempted. Melt flow properties, mechanical...

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Veröffentlicht in:Polymer international 2006-05, Vol.55 (5), p.565-569
Hauptverfasser: Li, Aiying, Chang, Jieyun, Wang, Kaiquan, Lu, Lude, Yang, Xujie, Wang, Xing
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container_issue 5
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container_title Polymer international
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creator Li, Aiying
Chang, Jieyun
Wang, Kaiquan
Lu, Lude
Yang, Xujie
Wang, Xing
description A highly branched polystyrene (HBPS) was synthesized via the copolymerization of 4‐(chloromethyl) styrene with styrene using the self‐condensing atom transfer radical polymerization method. The addition of HBPS as a melt modifier for polycarbonate (PC) was attempted. Melt flow properties, mechanical properties, thermal properties and morphology of the blends were studied. The results showed that a significant drop in the blend viscosity occurs immediately on addition of HBPS. Impact strength, tensile strength and glass transition temperature (Tg) of all the blends have not been significantly reduced compared with those of pure PC. The TGA analyses showed that an initial weight loss temperature of all the blends is above 458 °C and slightly low compared with that of pure PC, but all the blends still have excellent thermal stability. Morphological studies using SEM showed that a two‐phase morphology is characteristic of all the blends, with more or less spherical droplets of the minor HBPS phase dispersed in the continuous PC phase. Copyright © 2006 Society of Chemical Industry
doi_str_mv 10.1002/pi.2011
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subjects flow properties
highly branched polystyrene
mechanical properties
morphology
polycarbonate
thermal properties
title Melt flow properties, mechanical properties, thermal properties and morphology of polycarbonate/highly branched polystyrene blends
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