β晶型聚丙烯室温抗冲性能改善的形态学依据  

MORPHOLOGICAL EVIDENCE ON IMPROVING IMPACT BEHAVIOR FOR THE β-FORM OF ISOTACTIC POLYPROPYLENE

作　　者：沈静姝[1] 任宏燕[1] 

机构地区：[1]中国科学院化学研究所,北京100080

出　　处：《电子显微学报》1993年第4期342-347,共6页Journal of Chinese Electron Microscopy Society

基　　金：中国科学院重大研究项目和国家自然科学基金

摘　　要：本文用扫描电镜和透射电镜对熔体结晶的α晶型聚丙烯和β晶型聚丙烯的球晶形态进行了详细的观察。指出由于两类球晶结构上的差异,导致球晶之间的相互连结状况有很大的不同。β晶型球晶之间的片晶束交叉很紧密,以至于分辨不清明显的边界。这就减少了在边界处形成各类微缺陷的可能性,从而使其室温抗冲性能比α晶型的试样有较大的改善。Morphology of α-spherulites and β-spherulites for polypropylene has been studied by SEM and TEM. The β-form of spherulites differs fron the α-form in fhe category of lamellae growth. The lamellar linkage be- tween β-spherulites is crossed each other. The boundaries are hardly distinguished. As a result, the possibility of micro-defects generation on the boundaries of spherulites and inside the spherulites decreases. Hence the im- pact behaviour for β-form polypropylene at room temperature can be improved.

关 键 词：聚丙烯 Β晶型 抗冲性能 形态学 

分 类 号：TB324[一般工业技术—材料科学与工程] TQ325.14[化学工程—合成树脂塑料工业]