Unsaturated polyester resins: influence of the styrene concentration on the miscibility and mechanical properties

被引：95
|
作者：
Sanchez, EMS
Zavaglia, CAC
Felisberti, MI
机构：
[1] Univ Estadual Campinas, Inst Quim, BR-13083970 Campinas, SP, Brazil
[2] Univ Estadual Campinas, Fac Engn Mecan, BR-13083970 Campinas, SP, Brazil
来源：
POLYMER | 2000年 / 41卷 / 02期
基金：
巴西圣保罗研究基金会;
关键词：
unsaturated polyester; styrene; phase separation;
D O I：
10.1016/S0032-3861(99)00184-6
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Styrene is frequently used as comonomer for unsaturated polyester (UP) resins. Variations in the styrene content in the polyester affect the resulting properties. Dynamic mechanical tests show the phase separation in the cured resin with an increase of styrene concentration. The dependence of the glass transition temperature of the UP resin on the styrene content is complex and reflects a balance of elastic forces of the network and the immiscibility of polystyrene and UP. The thermal stability and the mechanical properties are governed by the phase behaviour of the mixture and therefore can be controlled by the styrene content. (C) 1999 Elsevier Science Ltd. All rights reserved.
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页码：765 / 769
页数：5
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