摘要
选用 Ｖｅｃｔｒａ Ａ９５０热致液晶共聚酯（ＬＣＰ）制备热致液晶共聚酯（ＬＣＰ）／聚酰胺 ６（ＰＡ６）／苯乙烯－马来酸酐无规共聚物（ＲＳＭＡ）三元共混物，并注射成型制得复合板材，研究三元 ＬＣＰ／ＰＡ ６／ＲＳＭＡ原位复合材料的形态结构、力学性质和破坏行为结果表明，ＲＳＭＡ是ＬＣ／ ＰＡ６ 复合材料的有效增容剂，ＲＳＭＡ的加入有利于ＬＣＰ在ＰＡ ６基体中原位成纤，增强了两相之间的界面粘 接 加入ＲＳＭＡ后，ＬＣＰ／ＰＡ ６原位复合材料的杨氏模量、抗拉强度和抗冲击强度明显提高． ＲＳＭＡ 能延长 ＬＣＰ／ＰＡ６复合材料的裂纹引发时间，增加裂纹引发能和总冲击能，对 ＬＣＰ／ＰＡ６原位复合材料 有增韧作用 ＲＳＭＡ的加入量存在一临界值．
The termary liquid crystalline polymer (LCP)/polyamide 6 (PA6)/styrene-maleic anhydride copolymer (RSMA) blends were prepared by twin-screw Brabender Plasticorder., and then were formed into composite plates by injection molding. The LCP employed was a commercial copolyester, Vectra A950. The morphological structure, mechanical properties and fracture behavior of these composites were systematically studied by scanning electron microscope, Instron universal tester, Ceast impact pendulum tester and drop weight impact tester. The results show that RSMA is an effective compatibilizer to LCP/PA6 composites. The addition of RSMA can enhance the microfibrill formation of LCP in PA6 matrix, improve the interfacial interaction between LCP and PA6. The stiffness, tensile strength and toughness of the in-situ composites increase with increasing the RSMA content and there is a critical content of RSMA for LCP/PA6/RSMA composites. RSMA can prolong the crack initiation time, and increase the energies for crack initiation and impact fracture of the in-situ composites, thereby leading to toughening of LCP/PA6 in-situ composites.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2001年第5期510-514,共5页
Chinese Journal of Materials Research
基金
国家自然科学基金资助项目50003005.
