ANIONIC HOMOPOLYMERIZATION AND BLOCK COPOLYMERIZATION OF 4-VINYLPYRIDINE AND ITS INVESTIGATION BY HIGH-TEMPERATURE SIZE-EXCLUSION CHROMATOGRAPHY IN N-METHYL-2-PYRROLIDINONE

被引：51

作者：

VARSHNEY, SK ^{[1
]}

ZHONG, XF ^{[1
]}

EISENBERG, A ^{[1
]}

机构：

[1] MCGILL UNIV,DEPT CHEM,MONTREAL H3A 2K6,QUEBEC,CANADA

来源：

MACROMOLECULES | 1993年 / 26卷 / 04期

关键词：

D O I：

10.1021/ma00056a022

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The low-temperature homopolymerization and block copolymerization of 4-vinylpyridine (4VP) initiated with monofunctional alkali-metal-based carbanionic species have been studied in tetrahydrofuran (THF), THF/hexamethylphosphoric triamide (THF/HMPT), or THF/dimethylformamide (THF/DMF) solvent mixtures. The polymers were analyzed by size-exclusion chromatography (SEC) in N-methyl-2-pyrrolidinone (NMP) at 90-degrees-C. Elution in NMP at 90-degrees-C is possible without adsorption of the poly(4-vinylpyridine) using a mu-Styragel packing material. The reported experimental conditions allow the high-yield synthesis of P4VP samples without contamination with branched material. The P4VP samples have a predetermined molecular weight and a very low polydispersity. Well-defined AB type diblock and ABA type triblock copolymers of 4VP with methacrylate monomers were prepared by sequential monomer addition initiated by different monofunctional initiators. Crossover propagation reactions from P4VP macroanions to methacrylate monomers and vice versa were demonstrated by size-exclusion chromatography.

引用

页码：701 / 706

页数：6

共 28 条

[21]

SHVARTS M, 1974, IONS ION PAIRS ORGAN, V2

[22] KINETICS OF ANIONIC COPOLYMERIZATION - DETERMINATION OF ABSOLUTE RATE CONSTANTS [J].