Strain-induced network chains damage in carbon black filled EPDM

被引：26

作者：

Candau, Nicolas ^{[1
,2
]}

Oguz, Oguzhan ^{[2
]}

Peuvrel-Disdier, Edith ^{[1
]}

Bouvard, Jean-Luc ^{[1
]}

Pradille, Christophe ^{[3
]}

Billon, Noelle ^{[1
]}

机构：

[1] PSL Res Univ, Mines ParisTech, CEMEF Ctr Mise Forme Mat, UMR CNRS 7635, CS 10207, F-06904 Sophia Antipolis, France

[2] Ecole Polytech Fed Lausanne, LMOM, Inst Mat IMX, Stn 12, CH-1015 Lausanne, Switzerland

[3] Mat Xper, F-06560 Valbonne, France

来源：

POLYMER | 2019年 / 175卷

关键词：

Elastomers; Damage; Chains network; VOLUME CHANGES; INDUCED CRYSTALLIZATION; NATURAL-RUBBER; TIRE SIDEWALL; FATIGUE; MODEL; DEFORMATION; BEHAVIOR; FRACTURE; GROWTH;

D O I：

10.1016/j.polymer.2019.05.017

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

This paper presents an experimental method to follow in-situ the chains network alteration of filled vulcanized rubbers induced by deformation. Macroscopic damage is first investigated on a series of EPDM by quantifying void fraction via Digital Image Correlation (DIC). In-situ DIC void fraction and the swollen pore fraction measured ex situ, i.e. on mechanically tested specimen, show analogous dependence on applied deformation. From such observation, Flory-Rehner equation is used by substituting fraction of swollen specimen by DIC void fraction to access to in-situ changes in network chains density, nu. Below the stretching ratio lambda = 3, reversible voids and accompanied by slight decrease of nu. Above lambda = 3, irreversible voids are associated with significant decrease of nu. Transition from reversible to irreversible voiding is finally ascribed to increased pore size of damaged elastically active chains network domains, as revealed by ex situ thermoporosimetry.

引用

页码：329 / 338

页数：10

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