ANIONIC-POLYMERIZATION OF ACRYLIC-MONOMERS .6. SYNTHESIS, CHARACTERIZATION, AND MODIFICATION OF POLY(METHYL METHACRYLATE) POLY(TERT-BUTYL ACRYLATE) DIBLOCK AND TRIBLOCK COPOLYMERS

被引:107
作者
VARSHNEY, SK [1 ]
JACOBS, C [1 ]
HAUTEKEER, JP [1 ]
BAYARD, P [1 ]
JEROME, R [1 ]
FAYT, R [1 ]
TEYSSIE, P [1 ]
机构
[1] UNIV LIEGE,MACROMOLEC CHEM & ORGAN CATALYSIS LAB,SART TILMAN B6,B-4000 LIEGE,BELGIUM
关键词
D O I
10.1021/ma00018a003
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Poly(methyl methacrylate)-b-poly(tert-butyl acrylate) (PMMA-b-PtBA) copolymers have been successfully synthesized by the sequential anionic polymerization of methyl methacrylate (MMA) and tert-butyl acrylate (tBA) in THF at -78-degrees-C. Although the order of monomer addition makes a difference on the initiation efficiency, it has no significant effect on the final achievement. Mono- and bifunctional initiators based on alkali metals can be used. When the initiators are modified by LiCl as a ligand, the polymerization of each block appears to be living, the molecular weight and composition can be predicted, and the molecular weight distribution is narrow. Size exclusion chromatography supports the absence of homo-PtBA in the PtBA-b-PMMA samples. The PtBA blocks can be quantitatively hydrolyzed into polyacid ones as supported by titration and H-1 NMR analysis.
引用
收藏
页码:4997 / 5000
页数:4
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