端羟基聚丙烯酸异辛酯及聚丙烯酸异辛酯-氨酯的制备及表征  

Preparation and characterization of hydroxyl terminated poly(2-ethylhexyl acrylate) and poly(2-ethylhexyl acrylate-urethane)

作　　者：孙治丹[1] 李坚[1] 任强[1] 俞强[1] 王红丹[1] 

机构地区：[1]江苏工业学院材料科学与工程学院,江苏常州213164

出　　处：《化工学报》2010年第5期1325-1330,共6页CIESC Journal

摘　　要：采用原子转移自由基聚合(ATRP)合成了分子量与设计分子量(2000)大小相符的聚丙烯酸异辛酯,再以N-甲基单乙醇胺作为亲核试剂,对活性端基溴进行亲核取代,得到了分子量可控、分子量分布较窄的线型端羟基聚丙烯酸异辛酯。以此为原料与甲苯二异氰酸酯(TDI)反应,制备得到了聚丙烯酸异辛酯-氨酯。利用核磁共振谱(1HNMR)、差示扫描量热仪(DSC)、热重示差扫描量热仪(TGA)对合成的端羟基聚丙烯酸异辛酯及聚丙烯酸酯异辛酯-氨酯的结构、热稳定性等进行了表征。结果表明,利用端羟基聚丙烯酸异辛酯成功地制备了聚丙烯酸异辛酯-氨酯,由凝胶渗透色谱仪(GPC)测得其分子量为10200,玻璃化转变温度为-54℃,是一种新型的丙烯酸酯与聚氨酯的共聚物。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 Mn of 2000 and OH functionality of about 1.80 was synthesized by ATRP.The glass transition temperature （Tg） 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 Mn of about 10200 was prepared by reacting hydroxyl terminated poly（2-ethylhexyl acrylate） with toluene diisocyanate （TDI）,which had a glass transition temperature （Tg） of about-54℃.

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 

分 类 号：TQ317.4[化学工程—高聚物工业]