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On the polymer effect observed with macromolecular photoinitiators: A study of the viscosity effect on the starting polymerization rate
Author(s) -
Leclercq Pascal,
Buisine JeanMarc,
Coqueret Xavier
Publication year - 1997
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1997.021980926
Subject(s) - polymerization , benzophenone , acrylate , polymer chemistry , viscosity , polymer , photopolymer , chemistry , kinetics , macromolecule , photochemistry , materials science , organic chemistry , copolymer , composite material , biochemistry , physics , quantum mechanics
Photopolymerizable acrylate compositions including small amounts of poly(butyl acrylate) were submitted to photocalorimetric measurements in order to investigate the effect of the mixture viscosity at zero conversion on the initial polymerization kinetics. No significant change of the initial polymerization rate profile was observed for starting viscosities ranging between 4 and 36 mPa · s and for a given concentration of low molecular weight photoinitiating system of the benzophenone‐amine type. This demonstrates that the polymer effect that leads to a higher value of the initial polymerization rate ( R p ) 0 when using an analogous photoinitiating system with the same content in polymeric benzophenone chromophores cannot be ascribed to the higher viscosity at zero conversion that results from the presence of the photosensitive macromolecules.