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A new photoinitiator system based on p-nitroaniline in the presence of aliphatic tertiary amines

✍ Scribed by Angel Costela; Inmaculada García-Moreno; Javier Dabrio; Roberto Sastre

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
641 KB
Volume
198
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Several kinetic aspects of the polymerization of dodecyl acrylate photoinitiated with p‐nitroaniline in the presence of an aliphatic tertiary amine, either 2‐(N,N‐diethylamino)ethanol or 2‐(N,N‐dimethylamino)ethyl methacrylate, acting as coinitiator, were studied. Under low absorption conditions, the rate of polymerization was found to be proportional to the square‐root of the incident light intensity, the initiator and the coinitiator concentrations. The polymerization behaviour was analyzed also under aerobic conditions. Under identical irradiation conditions, both initiation and polymerization processes present higher rates and quantum yields than those obtained with conventional aromatic ketone photoinitiators.

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