Synthesis of Di (4-hydroxyl benzophenone) sebacate and its usage as initiator in the photocrosslinking of polyethylene

摘要

A new benzophenone (BP) derivative with a long carbon chain and two chromophoric groups-di (4-hydroxyl benzophenone) sebacate (BP-S) used as a photoinitiator in the photocrosslinking of polyethylene (PE) has been synthesized and characterized by ultraviolet (UV) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and elemental analysis. The kinetic characteristics of BP-S photoinitiated crosslinking of PE in the melt and its compatibility with PE resin have been examined by gel content measurement and thermal migration experiment. The results show that BP-S is an excellent photoinitiator, which has better compatibility, less volatility, higher photoinitiating efficiency, and longer storage time than BP itself. It is promising for industrial applications of the photocrosslinking of polyolefins. (C) 2002 Wiley Periodicals, Inc. [References: 16]