PROTECTION AND POLYMERIZATION OF FUNCTIONAL MONOMERS .23. SYNTHESIS OF WELL-DEFINED POLY(2-HYDROXYETHYL METHACRYLATE) BY MEANS OF ANIONIC LIVING POLYMERIZATION OF PROTECTED MONOMERS

被引：82

作者：

MORI, H ^{[1
]}

WAKISAKA, O ^{[1
]}

HIRAO, A ^{[1
]}

NAKAHAMA, S ^{[1
]}

机构：

[1] TOKYO INST TECHNOL,FAC ENGN,DEPT POLYMER CHEM,MEGURO KU,TOKYO 152,JAPAN

来源：

MACROMOLECULAR CHEMISTRY AND PHYSICS | 1994年 / 195卷 / 09期

关键词：

D O I：

10.1002/macp.1994.021950918

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Anionic polymerizations of 2-[(trimethylsilyl) oxy]ethyl methacrylate (1), 2-[(tert-butyldimethylsilyl)oxy]ethyl methacrylate (2), and 2-[(methoxymethyl)oxy]ethyl methacrylate (3), the protected forms of 2-hydroxyethyl methacrylate (HEMA), were carried out in THF at -78 degrees C with 1,1-diphenylhexyllithium or 1,1-diphenyl-3-methylpentyllithium in the presence of LiCl. The resulting poly(1-3)s were found to possess predictable molecular weights and very narrow molecular weight distributions. The sequential polymerizations of tert-butyl methacrylate with the anionic propagating ends of poly(1-3) gave block copolymers in quantitative efficiency. Thus, the anionic polymerizations of 1-3 proceeded without transfer and termination reactions to afford stable living polymers. Complete hydrolysis of the protective groups of poly(1-3)s produced linear poly(HEMA) quantitatively. Novel well-defined di- and triblock copolymers containing hydrophobic [polystyrene, poly(4-octylstyrene), polyisoprene] and hydrophilic segments [poly(HEMA)] were also prepared by sequential polymerization of the corresponding hydrophobic comonomers with 1, followed by deprotection.

引用

页码：3213 / 3224

页数：12

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