摘要
首次用溶液高分辨￣（１３）ＣＮＭＲ研究了由二苯甲酮光引发低密度聚乙烯（ＬＤＰＥ）交联所产生的交联结构，现已观测和鉴定了Ｈ型和Ｙ型长链支化两类交联点。对于熔融态紫外光交联５－１０ｓ的ＬＤＰＥ样品，其Ｈ型和Ｙ型交联点的浓度据估测分别为一万个碳原子中有５．７－１６．９和７．６－２１．６个结构单元。
tructures of crosslinks produeed in benzophenone-photoinitiated crosslinking oflow density polycthylene (LDPE) have been studied for the firet time by solution-state^(13)C NMR spedroscopy. The H-links and Y-type long branches havc been observedand identified. The concentrations of H- and Y-type crosslinks are estimated to be5.7- 16-9 and 7.6-21.6 structure units pcr 10000 carbon atonis with the LDPE sam-ples UV-irradiated for 5- 10 seconds in the melt, respectively.
出处
《波谱学杂志》
CAS
CSCD
1995年第6期581-592,共12页
Chinese Journal of Magnetic Resonance
基金
国家自然科学基金
国家教委留学回国人员资助
关键词
低密度
聚乙烯
光交联机理
交联结构
NMR
Low density polyethylene (LDPE)
Photocrosslinking
Crosslink structurt
Mecha-nism
^(13)C NMR
