高等学校化学学报
高等學校化學學報
고등학교화학학보
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES
2001年
3期
511-513
,共3页
刘万军%沈静姝%王茁%卢凤才%徐懋
劉萬軍%瀋靜姝%王茁%盧鳳纔%徐懋
류만군%침정주%왕촬%로봉재%서무
物理老化%聚苯基单醚喹啉%银纹化
物理老化%聚苯基單醚喹啉%銀紋化
물리노화%취분기단미규람%은문화
The effects of physical ageing on the crazing of polyphenylquinoxaline(PPQ-E) films were studied. The DSC endothermic peak at the glass transition region of the samples was interpreted in terms of the cohesional entanglement theory. The free volume cavity size and free volume intensity of the samples were characterized by positron annihilation life spectroscopy. The difference in free volume cavity size and free volume intensity between two samples reflect the strength and density of cohensional entanglement point. The critical strain for craze initiation and craze stability depended on physical ageing of the samples. The relationships between physical ageing and crazing were interpreted initially.
