关键词:

原子转移自由基聚合, 端羟基聚丙烯酸异辛酯, 聚丙烯酸异辛酯-氨酯

Abstract:

A well-defined hydroxyl terminated poly(2-ethylhexyl acrylate) was prepared by atom transfer radical polymerization (ATRP) of 2-ethylhexyl acrylate, followed by the nucleophilic substitution of the bromo end group with N-methylethanolamine.Poly(2-ethylhexyl acrylate-urethane) was then synthesized by reacting the hydroxyl terminated poly(2-ethylhexyl acrylate) with toluene diisocyanate (TDI).The polymers were characterized by nuclear magnetic resonance (¹H NMR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC) and thermogravimetric analysis(TGA).The results showed that a hydroxyl terminated poly(2-ethylhexyl acrylate) with M_n of 2000 and OH functionality of about 1.80 was synthesized by ATRP.The glass transition temperature (T_g) of the hydroxyl terminated poly(2-ethylhexyl acrylate) was about -62℃, which was slightly higher than that of 2-ethylhexyl acrylate homopolymer.The decomposition temperature of the hydroxyl terminated poly(2-ethylhexyl acrylate) was around 409℃.Poly(2-ethylhexyl acrylate-urethane) with M_n of about 10200 was prepared by reacting hydroxyl terminated poly(2-ethylhexyl acrylate) with toluene diisocyanate (TDI), which had a glass transition temperature (T_g) of about -54℃.

Key words:

原子转移自由基聚合, 端羟基聚丙烯酸异辛酯, 聚丙烯酸异辛酯-氨酯