物理老化对聚苯基单醚喹噁啉薄膜银纹化的影响  

The Effects of Physical Ageing on Crazing of Polyphenylquinoxaline Films

作　　者：刘万军[1] 沈静姝[2] 王茁 卢凤才[2] 徐懋[2] 

机构地区：[1]中国科学院长春应用化学研究所 [2]中国科学院化学研究所分子科学中心 [3]吉林大学南岭校区应用化学系,长春130022

出　　处：《高等学校化学学报》2001年第3期511-513,共3页Chemical Journal of Chinese Universities

基　　金：国家科技部基础性研究重大关键项目 !(批准号 :95 11);高分子物理开放实验室基金!资助课题

摘　　要：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.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.

关 键 词：物理老化 聚苯基单醚喹恶啉 银纹化 薄膜 结构 

分 类 号：O631.33[理学—高分子化学] O633.5[理学—化学]