Structure-rheology relationships of long-chain branched polypropylene: Comparative analysis of acrylic and allylic coagent chemistry

被引：68

作者：

Parent, J. Scott ^{[1
]}

Bodsworth, Aidan ^{[1
]}

Sengupta, Saurav S. ^{[1
,2
]}

Kontopoulou, Marianna ^{[1
]}

Chaudhary, Bharat I. ^{[2
]}

Poche, Drew ^{[3
]}

Cousteaux, Stephane ^{[3
]}

机构：

[1] Queens Univ, Dept Chem Engn, Kingston, ON K7L 3N6, Canada

[2] Dow Chem Co USA, Piscataway, NJ 08854 USA

[3] Dow Chem Co USA, Freeport, TX 77541 USA

来源：

POLYMER | 2009年 / 50卷 / 01期

关键词：

Polypropylene; Long-chain branching; Rheology; GURP-PALMEN-PLOT; REACTIVE EXTRUSION; CROSS-LINKING; POLYMERS; POLYETHYLENES; MECHANISM;

D O I：

10.1016/j.polymer.2008.11.014

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 relationship between product structure and melt-state theological properties is established for series of branched PP derivatives prepared by the radical-mediated grafting of tri-functional coagents. Peroxide-initiated, solvent-free additions of linear PP to triallyl trimesate (TAM), trimethylol propane triacrylate (TMPTA) and triallyl phosphate (TAP) at high temperature are shown to produce bimodal molecular weight and branching distributions. Low-frequency dynamic shear viscosities as well as extensional viscosities are shown to be highly responsive to a hyper-branched chain population, whose abundance and molecular weight correlate with the kinetic chain length of the grafting process, and the propensity of a coagent to oligomerize. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：85 / 94

页数：10

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