摘要： 利用乙氧基化季戊四醇／ 双季戊四醇与由聚乙二醇（ＰＥＧ４００）、异佛尔酮二异氰酸酯（ＩＰ?ＤＩ）、２－羟基－２－甲基－１－［４－（２－羟基乙氧基）苯基］ －１－丙酮（Ｉｒｇａｃｕｒｅ ２９５９）反应形成的端异氰酸酯预聚体合成了 ２ 种可用于紫外光固化的长臂多官能度大分子光引发剂（ＭＰＩｓ）。 利用红外光谱、核磁共振谱表征其结构。 利用紫外－可见光谱研究了 ＭＰＩｓ 的光分解过程，用实时红外光谱研究了 ＭＰＩｓ 引发 １，６－己二醇二丙烯酸酯（ＨＤＤＡ）的聚合动力学。 结果表明：ＭＰＩｓ 的引发效率稍高于 Ｉｒｇａｃｕｒｅ ２９５９；光引发速度随引发剂用量增加而提高；与 Ｉｒｇａｃｕｒｅ ２９５９ 相比，ＭＰＩｓ 在光固化单体及树脂中的溶解性有所提高，光固化膜中残留光引发剂的迁移率降低。 ＭＰＩｓ 引发光固化聚合后的固化膜性能优异，表明ＭＰＩｓ 是一类性能优异的大分子光引发剂。

关键词: ＵＶ 固化, 大分子光引发剂, 多官能度, Ｉｒｇａｃｕｒｅ ２９５９

Abstract: Two long-arm macromolecular photoinitiators (MPIs )were synthesized by iso- cyanate-terminated pre-polymer prepared through the reaction of ethoxylated pentaerythrotol/ i-pentaerythritol with PEG400, isophorone diisocyanate and Irgacure 2959. The structures of di-P MPIs were charactenzed by FT-IR and NMR spectrometer. The photodegra of MPIs was analyzed by Uv-vis spectrometer. The photopolymerization dynamics of 1, 6-hexanediol diac-rylate initiated by Irgacure 2959 or MPIs was studied by real-time FT-IR technology. The re-sults revealed that initiating efficiency of MPls were better than that of Irgacure 2959. The rate of polymerization increased with the dosage of photoinitiators. Compared with Irgacure 2959,the solubility of MPls in photocurable monomers and resins were improved, the mobility of re- sidual photoinitiator in UV-cured films was reduced. The excellent performance of the cured films initiated by MPls indicated that MPls were a kind of macromolecular photoinitiators with excellent properties.

Key words: UV curing, macro photoinitiator polyfunctionality, Irgacure 2959