摘要
本工作旨在通过共混改性实现聚烯烃塑料高性能化。介绍了高密度聚乙烯（ＨＤＰＥ）／聚碳酸酯（ＰＣ）共混体系中组成对拉伸性能（拉伸强度、断裂伸长率）及形态的影响。结果表明，随ＰＣ含量增加，共混物的拉伸强度增加，断裂伸长率降低，而加入１０ｐｈｒ的增容剂烯基双酚Ａ醚接枝ＬＤＰＥ的体系，在相同ＰＣ含量时，其拉伸强度和断裂伸长率均高于未加增容剂的体系；ＰＣ含量低时，体系中ＰＣ基本上呈圆球状，ＰＣ含量较高时，部分ＰＣ粒子变形成椭球状、长条状、甚至纤维状；共混物受拉后，较多ＰＣ粒子向纤维状转变，就是因为这一形态的变化，承受了拉应力，对拉伸强度产生了贡献，由此给ＰＣ对体系拉伸性能影响进行了理论解释。
The present work aims at polyolefine based engineering plastics through blending polyolefine with general engineering plastics. It has introduced for HDPE/PC blending system the inflluences of composition on the tensile properties (tensile strength, elongation at break, etc.) and the morphology. Results indicate the following: with the PC concentration, the tensile strength of the blends increases, while the elongation decreases; adding 10 phr diayll biphenol A ether grafted LDPE (DBAE g LDPE), as a compatibilizer, the tensile strength value of the compatibilized system is always higher than that of the noncompatibilized one at the same PC content; for low PC content, the dispersed phase PC appeares as sphers, while for high PC content, partial PC particles become ellipsoids strips and fibre; after the blend has been drawn, the miafority of PC particles change into fibre. The reason that the action of PC on the PC/HDPE blends is explained through the morphology of the blends.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1998年第6期144-147,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金
国家产学研高技术产业化项目
