摘要
采用扫描电子显微镜、偏光显微镜、万能材料试验机及毛细管流变仪等对聚对苯二甲酸丙二醇酯/丙烯腈-苯乙烯-丙烯酸酯共聚物(PTT/ASA)共混物的相形态、力学性能、流变性能和热老化性能进行了研究。结果表明,PTT和ASA具有部分相容性,当ASA含量为50%时,共混物中形成了双连续相;随着ASA含量的增加,共混物的断面变得更粗糙,断裂方式转变为韧性断裂,ASA的加入明显提高了共混物的缺口冲击强度,但却降低了拉伸强度;共混物熔体为假塑性流体,随着ASA含量增加,熔体表观黏度升高、假塑性越明显,PTT的加工性能得到改善;PTT/ASA比PTT/丙烯腈-丁二烯-苯乙烯(ABS)共混物具有更好的耐热老化性能。
Blends of poly(trimethylene terephthalate)/acrylonitrile-styrene-acrylic copolymer were prepared through melt extrusion.The morphology,rheology,thermal aging,and mechanical properties of the blends were investigated using the scanning electrole microscopy,universal material testing machine,and a capillary rheometer.It was found that ASA and PTT were partially miscible in the blends.When ASA content was 50%,a binary continuous phase formed.The blend's fracture surface became rough with increasing ASA content.ASA component improved the impact strength but depressed the tensile strength of the blends.The apparent viscosity increased with increasing ASA content and the latter improved the processing property of the blends.The blends' pseudoplasticity increased with increasing ASA content.Moreover,PTT/ASA blend had better thermal aging resistance than that of PTT/ABS blend.
出处
《中国塑料》
CAS
CSCD
北大核心
2014年第5期42-47,共6页
China Plastics
