摘要
介绍了工程塑料的化学交联改性,化学扩链交联及自由基偶合交联是在工程塑料中引入三维网络结构的2种基本改性方法。交联改性可以提高工程塑料的力学性能和热性能。通过反应性官能团偶合可以一步制备具有交联结构的工程塑料,但随交联程度的提高,反应挤出的难度增加。由于自由基偶合交联工程塑料需要较长的前处理时间,生产效率低,难以工业化应用。开发高效交联剂、优化反应工艺是工程塑料交联改性的发展趋势。
Chemical crosslinking of engineering plastics has been briefly introduced. Crosslinking initiated by chain ex- tension and by coupling of free radicals are the two basic modification methods for introducing three - dimensional structure into engineering plastics. The mechanical and thermal properties of engineering plastics can be improved by crosslinking modification method. One - step preparation of crosslinked engineering plastics can be realized through coupling of reactive groups. However, the difficulty of reactive extrusion increases with the enhancement of crosslinking level. It is difficult to re- alize industrial application of crosslinking engineering plastics by coupling of free radicals due to the long pre - treatment time and low production efficiency. Future trends in crosslinking of engineering plastics focus on development of high effec- tive crosslinker and optimize reaction process.
出处
《纤维复合材料》
CAS
2013年第3期57-60,共4页
Fiber Composites
关键词
工程塑料
化学交联
交联结构
力学性能
热性能
engineering plastics
chemical crosslinking
crosslinking structure
mechanical properties
thermal prop-erties
