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Photoinitiating characteristics of benzophenone derivatives as new initiators in the photocrosslinking of polyethylene
Author(s) -
Wu Qianghua,
Qu Baojun
Publication year - 2001
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10823
Subject(s) - benzophenone , fourier transform infrared spectroscopy , materials science , polyethylene , photoinitiator , curing (chemistry) , polymer chemistry , chemical engineering , photochemistry , polymer , chemistry , composite material , engineering , monomer
Two kinds of benzophenone (BP) derivatives, dodecyl‐benzophenone (BP‐D) and hexadecoxyl‐benzophenone (BP‐H), used as new photoinitiators have been synthesized by Friedel‐Crafts reactions and identified by ultraviolet (UV) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and elemental analysis. The kinetic characteristics of photoinitiating crosslinking of BP‐D and BP‐H comparing with BP in the photocrosslinking of polyethylene (PE) in the melt and their compatibility with PE resin have been examined by gel content measurement and thermal migration experiments. The results show that these two BP derivatives are excellent photoinitiators, which have better compatibility, less volatility, higher photoinitiating efficiencies, and longer storage time than BP itself. These two new photoinitiators are promising for industrial applications of the photocrosslinking of polyolefins and curing of coats.