Mathematical Modeling of MWD and CBD in Polymerizations with Macromonomer Reincorporation and Chain Running

被引：10

作者：

Ferreira, Luis Carlos, Jr. ^{[1
]}

Nele, Marcio ^{[2
]}

Costa, Marcos A. S. ^{[3
]}

Pinto, Jose Carlos ^{[1
]}

机构：

[1] Univ Fed Rio de Janeiro, Programa Engn Ouim COPPE, BR-21941972 Rio De Janeiro, Brazil

[2] Univ Fed Rio de Janeiro, Escola Quim, BR-21941909 Rio De Janeiro, Brazil

[3] Univ Estado Rio de Janeiro, Inst Quim, BR-20550900 Rio De Janeiro, Brazil

来源：

MACROMOLECULAR THEORY AND SIMULATIONS | 2010年 / 19卷 / 8-9期

关键词：

GEOMETRY METALLOCENE CATALYST; MOLECULAR-WEIGHT DISTRIBUTION; ETHYLENE POLYMERIZATION; BRANCHING DISTRIBUTION; OLEFIN POLYMERIZATION; MIXED SYSTEMS; POLYETHYLENE; POLYOLEFINS; PROPYLENE; COPOLYMERIZATION;

D O I：

10.1002/mats.201000039

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A model is proposed for the computation of MVVD and CBD when the simultaneous formation of LCB and SCB is possible. LCBs are produced through incorporation of unsaturated polymer chains. SCBs are produced through chain running as a series of spontaneous chain transfer and reinsertion steps. The model was solved numerically with the help of orthogonal adaptive collocation techniques. It is shown that ten collocation points are sufficient to provide accurate numerical solutions for the evolution of MWDs and CBDs. The model can be used successfully to represent experimental data available for ethylene polymerizations performed with nickel catalysts and butadiene polymerizations performed with neodymium catalysts.

引用

页码：496 / 513

页数：18

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