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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 5, Number 1
February 20, 1961 

Studies on Epoxy Resins (Part 1) Polymerization of Epichlorohydrin with Naphthylamines

Epoxy 수지에 관한 연구 (제1보) Naphthylamines 및 Aromatic amines 과 Epichlorohydrin과의 중합물에 관하여
Jyong Sup Shim, Sung Il Hong

심정섭, 홍성일
Nowadays, it is a well-known fact that the epoxy resins play an important role in the industrial field of plastics because of their excellent properties. Although studies on the polymers of epichlorohydrin with phenols, up-to-date, were various, there were only a few wokrs on the polymers of epichlorohydrin with amines. Therefore the experiments are carried out about the polymerization of epichlorohydrin with α-, β-naphtylamine, o-, m-, p-toluidine, and o-, m-, p-nitroaniline. Examining the polymerization processes and the differences in the properties of the polymers, we obtained the following conclusions. 1) α-naphthylamine, β-naphthylamine, o-toluidine, m-toluidine and p-toluidine react with epichlorohydrin to form polymers but o-, m-, and p-nitroaniline do not make polymers with epichlorohydrin. 2) As polymerization times after adding sodium hydroxide and refluxing again 3hrs. are suitable for α-naphthylamine-epichlorohydrin, 3.5hrs. for β-naphthylamine-epichlorohydrin, and 4hrs, for m-toluidine-epichlorohydrin. 3) Method for determining molecular weight of these polymers by the titration of end group is applicable to the polymers having D.P. less than about 200 for α-, β-naphthylamine-epichlorohydrin and those having D.P. less than 18 for m-toluidine-epichlorohydrin. 4) Gererally, these polymers get special colors so that these need proper pigmentation to use as molding compounds.
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