CATIONIC POLYMERIZATION IN IODINE LIQUID SULFUR-DIOXIDE SYSTEM .2. THE LONG-LIVED POLYMERIZATION OF ALPHA-METHYLSTYRENE IN HOMOGENEOUS MEDIUM

被引：2

作者：

DASILVA, A ^{[1
]}

GOMES, AS ^{[1
]}

SOARES, BG ^{[1
]}

机构：

[1] UNIV FED RIO DE JANEIRO,ILHA FUNDAO,CTR TECNOL,INST MACROMOLEC,BL J CP 68525,BR-21945 RIO JANEIRO,BRAZIL

来源：

POLYMER BULLETIN | 1992年 / 29卷 / 05期

关键词：

D O I：

10.1007/BF00296711

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(alpha-methylstyrene) with narrow molecular weight distribution (MWD) was obtained by cationic polymerization initiated by iodine in methylene chloride/liquid SO2 (80/20 vol.%) or toluene/liquid SO2 (45/55 vol.%) mixed solvent at -60-degrees-C. The average number molecular weights of the product polymers increased with monomer conversion but the dependence was not linear because of the low initiation efficiency at the beginning of the reaction. On addition of a fresh feed of monomer at the end of the polymerization, the added feed was polymerized at the same rate with an increase of molecular weight. The low dispersity was kept after the second monomer addition. The initiation efficiency increased during the polymerization.

引用

页码：509 / 514

页数：6

共 5 条

[1]

HIGASHIMURA T, 1984, ADV POLYM SCI, V62, P49

[2] MODELING OF POLYMERIZATION REACTIONS .3. COMPUTER-SIMULATION OF IODINE INITIATED POLYMERIZATION OF STYRENE - EFFECT OF TEMPERATURE, SOLVENT AND HYDROGEN IODIDE COCATALYSIS [J].