敏化的3,4-聚异戊二烯-2,6-双(4’-叠氮苄叉)环己酮体系的光交联反应研究

The Study on Photocrosslinking Reaction of Sensitized 3,4-Polyisoprene-2,6-Bis(4′-Azidobenzal)Cyclohexanone

本文对二苯甲酮敏化前后3,4-聚异戊二烯-2,6-双(4′-叠氮苄叉)环己酮体系的光交联反应进行了研究。证明了该体系的光交联反应以双氮烯和被二苯甲酮活化的大分子的外双键加成为主。

This paper studied the pholocrosslinking reaction of sensitized and unsensilized 3,4-polyisoprene-2,6-bis(4'-azidobenzal)cyclohexanoncIt was found that in the system of sensitized 3,4-polyisoprenc-2,6-bis(4'-azidobenzal)cyclohexanonc,the number of double bonds decreased greatly and the content of nitrogen increased 4 to 5 times than unsensitized system.By means of IRand LCfor measurement of the photocrosslinking products and its CCl_(4) extractives respectively,it was confirmed that the essential reaction in benzophenone-scnsitizcd system was the addition between dinitrene and the external double bonds which were activated by benzophenonc,although the cyclized reaction was the principal mode of external bonds consume.