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In situ study of photopolymerization by fourier transform infrared spectroscopy
Author(s) -
Udagawa Atsushi,
Sakurai Fumio,
Takahashi Tatsuo
Publication year - 1991
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1991.070420707
Subject(s) - photopolymer , photoinitiator , benzoin , materials science , fourier transform infrared spectroscopy , acrylate , polymerization , acrylate polymer , polymer chemistry , interpenetrating polymer network , epoxy , polymer , composite material , chemical engineering , copolymer , monomer , engineering
The Fourier transform infrared (FTIR) in situ method was developed for the investigation of photopolymerization. Ultraviolet (UV) cure of a mixture of a cycloaliphatic epoxide, a 2‐ethylhexyl acrylate, and photoinitiators, which forms simultaneous interpenetrating polymer network (IPN), was monitored while the sample was irradiated with UV light. Triphenylsulfonium salt and benzoin ether were used as photoinitiators. For the sake of comparison, similar experiments were performed for the epoxide with the triphenylsulfonium salt photoinitiator and the acrylate with the benzoin ether photoinitiator. The epoxy photopolymerization was monitored using an epoxy CH stretching band at 3005 cm −1 and a ring vibration band at 790 cm −1 . The acrylic photopolymerization was monitored using a CC stretching band at 1637 cm −1 . The epoxy conversion was less than 60% when the acrylic polymerization was completed in the IPN.