演題概要

オーラルセッション

第2日 6月18日(木) 10:10~10:30 C会場(101)

超臨界メタノール分解/MALDI 高分解能 TOFMSによる共重合型紫外線・電子線硬化樹脂の架橋連鎖構造解析

(名工大)
o宮澤誠

The cross-linking structures of the ultraviolet (UV) and electron beam (EB) cured resins prepared from pentaerithritol triacrylate and N-vinylpyrrolidone (VP) mixtures were characterized by MALDI-high resolution-TOFMS combined with supercritical methanolysis. Reflecting the cross-linking sequences, two types of methyl acrylate/VP copolymeric methanolysis products with different terminal structure were observed on the MALDI mass spectrum. Almost all the expected products were completely separated on the spectra including the isotope peaks. In the case of UV cured resins, the relative yield of the two types of the products were fairly comparable. The composition distributions of the products for each n-mer were changed depending on the copolymer compositions of the original cured resins, although slightly different between two types of products. The composition distributions in the products of EB cured resins also reflected the original copolymer composition, and those in two types of products were quite identical for EB cured resins. However, the relative yields of two types of the products were much different each other. The observed difference in the yields of the methanolysis products between UV and EB cured resins can be interpreted in terms of the differences in the terminal structures of the cured resins.