About the cure kinetics in natural rubber/styrene Butadiene rubber blends at 433 K

被引：8

作者：

Mansilla, M. A. ^{[1
]}

Marzocca, A. J. ^{[1
]}

机构：

[1] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, Lab Polimeros & Mat Compuestos, RA-1428 Buenos Aires, DF, Argentina

来源：

PHYSICA B-CONDENSED MATTER | 2012年 / 407卷 / 16期

关键词：

Natural rubber; Styrene butadiene rubber; Blend; Cure kinetics; Crosslinks; VULCANIZATION; SBR;

D O I：

10.1016/j.physb.2011.12.084

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Vulcanized blends of elastomers are employed in several goods mainly to improve physical properties and reduce costs. One of the most used blends of this kind is that composed by natural rubber (NR) and styrene butadiene rubber (SBR). The cure kinetic of these blends depends mainly on the compound formulation and the cure temperature and time. The preparation method of the blends can influence the mechanical properties of the vulcanized compounds. In this work the cure kinetic at 433 K of NR/SBR blends vulcanized with the system sulfur/TBBS (N-t-butyl-2-benzothiazole sulfenamide) is analyzed in samples prepared by mechanical mixing and solution blending. The two methods produce elastomer domains of NR and SBR, which present different microstructure due to the cure level attained during vulcanization. The cure kinetics is studied by means of rheometer tests and the model proposed by Kamal and Sourour. The analysis of the cure rate is presented and is related to the structure obtained during the vulcanization process. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：3271 / 3273

页数：3

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