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The use of a recording dilatometer to study the photopolymerization of ethylene glycol dimethacrylate using the isobutyl ether of benzoin as photoinitiator
Author(s) -
McGinniss Vincent D.,
Holsworth Richard M.
Publication year - 1975
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.1975.070190816
Subject(s) - photopolymer , dilatometer , photoinitiator , materials science , benzoin , monomer , triethylene glycol , ethylene glycol , polymer chemistry , polymer , acrylate polymer , acrylate , chemical engineering , composite material , chemistry , organic chemistry , thermal expansion , engineering
Abstract A simple recording dilatometer was adapted and used to determine or follow the rates of photopolymerization of ethylene glycol dimethacrylate with the isobutyl ether of benzoin as photoinitiator. The photopolymerization was recorded from 0% to 100% conversion of monomer to polymer, and the results from the dilatometer were compared with other methods (gravimetric, electrical resistance, and differential thermal analysis). The rates of photopolymerization were calculated as a function of initiator concentration, light intensity, and monomer concentration. Gel points could be directly determined along with the degree of conversion of monomer to polymer formation. The recording dilatometer can be used to measure rates of photopolymerization of ultraviolet crosslinking monomers, polymers, or coating systems.