Molecular weight distributions in styrene polymerization with asymmetric bifunctional initiators

被引：20

作者：

Asteasuain, M ^{[1
]}

Brandolin, A ^{[1
]}

Sarmoria, C ^{[1
]}

机构：

[1] UNS, CONICET, Planta Piloto Ingn Quim, RA-8000 Bahia Blanca, Buenos Aires, Argentina

来源：

POLYMER | 2004年 / 45卷 / 01期

关键词：

polystyrene; bifunctional initiators; MWD;

D O I：

10.1016/j.polymer.2003.10.083

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We model the molecular weight distribution (MWD) of polystyrene obtained using asymmetric bifunctional initiators. We do that by extending an existing model able to predict conversions and average molecular weights. By applying probability generating functions to the mass balances, a finite set of differential equations is obtained. This set must be solved and numerically inverted in order to obtain the MWD. Validation was performed using available experimental data on average molecular weights. Those calculated from the predicted MWD agree well with the reported experimental data. In order to show the potential of the model as a tool to tailor MWD, we use it to evaluate operating conditions in a batch reactor that would result in bimodal MWD. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：321 / 335

页数：15

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