Modification of the physical, mechanical and thermal properties of poly(vinyl chloride) by blending with poly(ethyl methacrylate)
Modification of the physical, mechanical and thermal properties of poly(vinyl chloride) by blending with poly(ethyl methacrylate)
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通过与聚甲基丙烯酸乙酯共混改性聚氯乙烯的物理、机械和热性能
DOI：
10.1002/app.26256
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
D. Chakraborty
中科院分区：
文献类型：
--
作者：
R. Chakrabarti;D. Chakraborty
研究了聚氯乙烯（PVC）与不同比例的聚甲基丙烯酸乙酯（MMA）共混物的物理、力学、热学和形态学性能。共混物表明模量和极限拉伸强度值逐渐上升，随后与基础参考化合物PVC相比，在初始上升之后断裂伸长率和韧性值的百分比降低。研究了PVC-PEMA共混物组成对热稳定性的影响。共混物的差示扫描量热曲线表明，内移的PVC玻璃化转变温度和上移的降解温度。热机械分析结果还表明，根据所研究的不同样品的软化特性，热稳定性超过未改性的基础参考化合物PVC。从扫描电子和光学显微照片中明确的双相共连续系统支持在初始阶段的相混合，随后随着PEMA掺入百分比的增加而逐渐消失。其热力学参数与力学性能相一致，并得到了形态学研究的进一步支持。© 2007威利期刊公司应用聚合物科学杂志，2007年
Blends of poly(vinyl chloride) (PVC) with different ratio of poly(ethyl methacrylate) were characterized with respect to their physical, mechanical, thermal, and morphological properties. The blends indicated a gradual rise in the modulus and ultimate tensile strength values followed by a reduction in the percent elongation at break and toughness values after an initial rise compared to the base reference compound PVC. The effect of composition of the PVC-PEMA blends on the thermal stability was investigated. Differential scanning calorimetric curves of the blends showed an inward shift of the PVC glass transition temperature and an upward shift in the degradation temperature. The thermomechanical analysis results also indicated thermal stability over unmodified base reference compound PVC from the softening characteristics of the different samples under study. The biphasic cocontinuous systems as explicit from the scanning electron and optical micrographs supported phase-mixing at the initial stages with subsequent phasing out tendency with increasing percentage of PEMA incorporation. The thermomechanical parameters are in conformity to their mechanicals, which have been further supported by their morphological studies. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007