The effects of endlinking network and entanglement to stress-strain relation and strain-induced crystallization of un-vulcanized and vulcanized natural rubber

被引：78

作者：

Amnuaypornsri, Sureerut ^{[2
]}

Toki, Shigeyuki ^{[1
]}

Hsiao, Benjamin S. ^{[1
]}

Sakdapipanich, Jitladda ^{[2
,3
,4
]}

机构：

[1] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA

[2] Mahidol Univ, Inst Mol Biosci, Nakhon Pathom 73170, Thailand

[3] Mahidol Univ, Fac Sci, Dept Chem, Bangkok 10400, Thailand

[4] Mahidol Univ, Fac Sci, Ctr Excellence Innovat Chem, Bangkok 10400, Thailand

来源：

POLYMER | 2012年 / 53卷 / 15期

基金：

美国国家科学基金会;

关键词：

Natural rubber; Strain-induced crystallization; Entanglement; ANGLE X-RAY; ALPHA-TERMINAL GROUP; STRUCTURAL-CHARACTERIZATION; UNIAXIAL DEFORMATION; POLYISOPRENE RUBBER; BRANCH-POINTS; ORIENTATION; DECOMPOSITION; MORPHOLOGY; SCATTERING;

D O I：

10.1016/j.polymer.2012.05.020

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Simultaneous synchrotron X-ray and stress-strain measurement of un-vulcanized natural rubber (NR) revealed that an upturn of stress at large strains and strain induced crystallization (SIC) are caused by endlinking pseudo network and entanglements. Higher pseudo network density of un-vulcanized NR shows higher modulus and larger fraction of SIC. At faster stretching speed, un-vulcanized NR shows higher stress and larger fraction of SIC. On the other hand, vulcanized NR show almost the same stress-strain relation and smaller fraction of SIC at faster stretching speed. Those different behaviors are governed by entanglements, endlinking pseudo networks in un-vulcanized NR and chemical bond networks, small amount of entanglements and endlinking networks in vulcanized NR. (c) 2012 Elsevier Ltd. All rights reserved.

引用

页码：3325 / 3330

页数：6

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