Aqueous emulsion polymerization of styrene and substituted styrenes using titanocene compounds

被引：10

作者：

Pragliola, Stefania ^{[1
]}

De Vita, Rosanna ^{[1
]}

Longo, Pasquale ^{[1
]}

机构：

[1] Univ Salerno, Dipartimento Chim & Biol, I-84084 Fisciano, SA, Italy

来源：

POLYMER | 2013年 / 54卷 / 06期

关键词：

Emulsion polymerization; Polystyrene; Metallocene; SYNDIOTACTIC-SPECIFIC POLYMERIZATION; MOLECULAR-WEIGHT POLYMER; COORDINATION POLYMERIZATION; RADICAL POLYMERIZATION; PROPYLENE POLYMERIZATIONS; CATALYTIC POLYMERIZATION; METALLOCENE CATALYSTS; ETHYLENE; WATER; COMPLEXES;

D O I：

10.1016/j.polymer.2013.01.017

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Aqueous emulsion polymerization of styrene in the presence of half-titanocenes which CpTiCl3, (CpCH2CH2OCH3)TiCl3, and of the titanocene (Ph)(2)C[(Cp)(Flu)Ti]Cl-2 is effected. The polymer features are compared with those of polystyrene obtained in the same reaction conditions, by using Cp2TiCl2 as initiator. Titanocene (Ph)(2)C[(Cp)(Flu)Ti]Cl-2 does not show any activity in styrene polymerization. On the contrary, by using both half-titanocenes CpTiCl3 and (CpCH2CH2OCH3)TiCl3, stereoirregular polystyrene is produced. Aqueous emulsion polymerization of substituted styrenes (3-methyl-styrene, 4-methyl-styrene, 3-chloro-styrene, 4-chloro-styrene) is also performed in the presence of Cp2TiCl2. From all monomers, stereoirregular polymers are obtained. Monomer reactivity results dependent on the substituent on the aromatic ring. Aqueous emulsion styrene - 4-chloro-styrene copolymerizations are performed by using Cp2TiCl2, too. Copolymer composition totally reflects that of comonomers used in the feeding. According to a statistical distribution of comonomers, the product of the reactivity ratios is 1.1. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：1583 / 1587

页数：5

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