摘要
为获得超高分子量聚乙烯的超高取向性，利用准稀溶液速冷解缠方法可使其λｍ４００，力学性能大幅度提高，但距离链的理论强度还有一定差距，ＮＭＲ的相结构研究表明其中仍残存一定量的界面层及非晶部分。从缠结链角度来看，其分子链的解缠并不能达到完全。根据Ｒａｍａｎ及ＮＭＲ研究结果讨论该膜在拉伸取向前后及经热处理后链缠结的形成及解缠结问题。
The effect of annealing and drawing on the phase structure of ultrahigh molecular weight polyethylene (UHMWPE) gel-films was studied by Raman spectroscopy. Our attention focused mainly on the mass fraction changes of interface phase. The results were also compared with data obtained from IR, DSC and 13 C-NMR methods. The relationship between the mass fraction changes of interface phase and chain entanglements was discussed.
出处
《功能高分子学报》
CAS
CSCD
1999年第1期49-53,共5页
Journal of Functional Polymers
基金
国家自然科学基金
关键词
拉曼光谱
超高分子量
聚乙烯
凝胶膜
超高强度
raman spectroscopy
UHMWPE gel/crystalline films
chain entanglement
drawing annealing
