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Distribution of onium salt photoinitiators in a two‐phase epoxy system
Author(s) -
Covert Kathleen L.,
Russell David J.
Publication year - 1993
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.1993.070490411
Subject(s) - photoinitiator , sulfonium , epoxy , cationic polymerization , photopolymer , polymer chemistry , materials science , onium , scanning electron microscope , phase (matter) , salt (chemistry) , chemical engineering , chemistry , composite material , polymer , organic chemistry , monomer , ion , engineering
A phase‐separated epoxy blend containing a sulfonium salt cationic photoinitiator was studied. The onium salt was found to be preferentially soluble in one of the resins of the system. Scanning electron microscopy and microprobe analyses were done to determine the concentration distribution in the phases and the results compared to a model based on liquid extraction distribution coefficient behavior. Finally, the photolithographic behavior of various blends of the epoxy resins is discussed and the results compared to the behavior predicted by the photoinitiator distribution. © 1993 John Wiley & Sons, Inc.