The polymerization of styrene and acrylonitrile in the presence of two unsaturated optical brightening agents (OBs), 1,8-naphthalimide derivatives, has been investigated. It was found that the monomeric optical brighteners took part in the polymerization and were covalently bound in the polymer chain. The influence of the monomeric OBs on the rate of the process and on some of the properties of the copolymers thus obtained, such as molecular weight and thermostability, was established.
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Konstantinova et al. (1997) studied this question.
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