学術雑誌論文 Mechanistic Study of Ring-Opening Copolymerization of ɛ-Caprolactam with Epoxide: Development of Novel Thermosetting Epoxy Resin System

KUDO, Hiroto  ,  BUYA, Kentaro

54 ( 14 )  , pp.2220 - 2228 , 2016-03-24 , Wiley
ISSN:0887624X
NII書誌ID(NCID):AA1068915X
内容記述
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).
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http://kuir.jm.kansai-u.ac.jp/dspace/bitstream/10112/11267/1/KU-1100-20150214-00.pdf

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