We investigated the mechanism of the ring-opening copolymerization of ɛ-caprolactam (ɛ-CL) with glycidyl phenyl ether (GPE) to afford poly(ɛ-CL-co-GPE) as a model reaction of the thermal curing of certain epoxy resins with ɛ-CL. The reaction of ɛ-CL and GPE proceeded efficiently in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) at 170°C for 2 h. The monomer reactivities r1 of ɛ-CL and r2 of GPE calculated according to the Fineman-Ross method and the Kelen-Tüdös method were 0.58 and 5.52, respectively. These values indicate that poly(ɛ-CL-co-GPE) has a pseudo-block gradient copolymer. Based on these results, we examined the thermal curing reactions of certain epoxy resins with ɛ-CL. The corresponding novel cured products were obtained quantitatively, and each of them showed a high glass transition temperature and high thermal stability, presumably due at least in part to a pseudo-block gradient primary structure resembling that of poly(ɛ-CL-co-GPE).
雑誌名
Journal of polymer science. Part A, Polymer chemistry
巻
54
号
14
ページ
2220 - 2228
発行年
2016-03-24
ISSN
0887624X
書誌レコードID
AA1068915X
DOI
10.1002/pola.28095
権利
This is the peer reviewed version of the following article: Kudo, H. and Buya, K. (2016), Mechanistic study of ring-opening copolymerization of ɛ-caprolactam with epoxide: Development of novel thermosetting epoxy resin system. J. Polym. Sci. Part A: Polym. Chem., 54: 2220–2228, which has been published in final form at doi:10.1002/pola.28095. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.