Thermo-oxidative stress relaxation in carbon-filled SBR

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES

Plastics, Rubber and Composites Pub Date : 2021-04-20 DOI:10.1080/14658011.2021.1913385

A. Dinari, F. Zaïri, M. Chaabane, J. Ismail, T. Benameur

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引用次数: 8

Abstract

ABSTRACT The thermo-oxidative stress relaxation in carbon-filled styrene-butadiene rubber is investigated using a two-step strategy consisting in homogeneous aging identification followed by heterogeneous aging prediction. Experimental observations of the chemical relaxation effects on the permanent deformation and on the equilibrium stiffness are reported on flat samples, containing various amounts of carbon-black fillers and aged at various temperatures and exposure times. The thermally activated degradation, implying scission-reformation mechanisms of links at a constant stretch at high temperature, is modelled from network decomposition under homogeneous aging conditions. An equivalent aging time, using the consumed oxygen across the thickness of bulk structures, is then introduced into the network alteration kinetics in order to predict the diffusion-limited oxidation effects on a bulk sample. Thanks to the model, the macroscopic chemical relaxation response and the heterogeneous damage patterns are discussed in connection to aging conditions and carbon-black filler content.

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碳填充SBR的热氧化应激松弛

采用均匀老化识别和非均相老化预测两步策略研究了碳填充丁苯橡胶的热氧化应力松弛。本文报道了在含不同数量的炭黑填料和在不同温度和暴露时间下老化的平面样品上，化学松弛效应对永久变形和平衡刚度的实验观察。热激活降解，意味着链接在高温恒定拉伸下的断裂-重组机制，是由均匀老化条件下的网络分解模拟的。等效老化时间，利用消耗的氧气在整个体结构的厚度，然后被引入到网络蚀变动力学，以预测扩散限制氧化对体样品的影响。利用该模型，讨论了老化条件和炭黑填料含量对材料宏观化学松弛响应和非均质损伤模式的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plastics, Rubber and Composites 工程技术-材料科学：复合

CiteScore

4.10

自引率

0.00%

发文量

审稿时长

4 months

期刊介绍： Plastics, Rubber and Composites: Macromolecular Engineering provides an international forum for the publication of original, peer-reviewed research on the macromolecular engineering of polymeric and related materials and polymer matrix composites. Modern polymer processing is increasingly focused on macromolecular engineering: the manipulation of structure at the molecular scale to control properties and fitness for purpose of the final component. Intimately linked to this are the objectives of predicting properties in the context of an optimised design and of establishing robust processing routes and process control systems allowing the desired properties to be achieved reliably.