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Kinetics of photocrosslinking reactions of a DCPA/EA matrix in the presence of thiols and acrylates

✍ Scribed by G. Eisele; J. P. Fouassier; R. Reeb

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 259 KB
Volume: 35
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(19970915)35:12<2333::aid-pola2>3.0.co;2-w

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✦ Synopsis

The crosslinking efficiency and kinetics of a solid acrylic copolymer DCPA/ EA (dicyclopentenyl acrylate/ethyl acrylate) matrix were investigated in the presence of pentaerythritol tetrakis(2-mercaptoacetate) (PETMP) or pentaerythritol tri-and tetraacrylates used as multifunctional crosslinking agents. The reaction of thiol and acrylate addition was sensitized by benzophenone (BP). The crosslinking efficiency of the DCPA/EA-BP-PETMP copolymer system, illuminated at high wavelengths ( l ú 310 nm), was compared with that of the DCPA/EA matrix alone and the 2-component system copolymer DCPA/EA-BP. The concentrations of photosensitizer and crosslinking agent were varied from 1 to 10 mass %. The kinetics of tetrafunctional thiol addition and cyclopentene (pendant group of the DCPA/EA matrix) disappearance was followed through Fourier transform infrared (FTIR) and by determining the gel content.

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