摘要
对 PC/SMA共混体系的 DSC、DMA研究结果表明 ,该体系是一部分相容体系 ,随着 MA含量的增大 ,体系的相容性提高 ,合金的缺口冲击强度大幅度下降 ,拉伸及弯曲强度变化幅度不大。在共混体系中 SMA树脂的加入量以 2 0～ 30份为宜。流变学实验表明 ,共混体系的流动行为指数 n值小于 1 ,PC树脂的加工性得到改善 ,而且 SMA树脂与 PC在熔融共混时有接枝共聚反应发生 ;SEM观察表明 SMA树脂的加入量及其中 MA含量的提高都可以使得合金中粒子尺寸减小 ,分布均匀。
DSC,DMA experiments show that PC/SMA blend system is a partially compatible blend system. Along with the content of maleic anhydride increased, the compatibility of the PC/SMA blend system is improved, the izod impact strength decreases rapidly and tensile strength, inflect strength varies gently. The suitable adding amount of SMA into PC/SMA blend is 20%~30 mass%. Rheological experiment show that the flowing index ( n ) is less than 1, the process capability of PC is improved and a graft copolymerization reaction occurres between PC and SMA in the melt. SEM analysis shows that increasing the amount of SMA and maleic anhydride can also decrease the particle size, make its distribution equality.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2000年第3期121-124,共4页
Polymer Materials Science & Engineering
关键词
PC
SMA
共混体系
相容
力学性能
加工性
SMA/PC blend system
partially compatible
mechanics properties
process capability
