Structure-Property relationships in natural rubber representing several clonal varieties of Hevea Brasiliensis

IF 1.1 4区材料科学 Q4 MATERIALS SCIENCE, COMPOSITES

Progress in Rubber Plastics and Recycling Technology Pub Date : 2022-09-14 DOI:10.1177/14777606221127372

S. Saiwari, N. Hayeemasae, S. Soontaranon, E. Kalkornsurapranee, Ruedee Jaratrotkamjorn, A. Masa

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引用次数: 1

Abstract

In this study, the relationships between the structure of unvulcanized rubber and vulcanizate properties were investigated for the three natural rubber clones: RRIT251, PB235, and RRIM600. The highest tensile properties of rubber vulcanizates were achieved from the PB235 clone whereas the RRIM600 showed the lowest. The PB235 contained the largest average molecular weight (Mw) with the narrowest molecular mass distribution (MWD), whereas the least Mw was for RRIM600 with the broadest MWD. The highest protein contents were noticed in RRIM600 where the highest gel formation was found. In contrast, the PB235 showed the smallest amount of proteins and gel contents. Based on this finding, the results clearly suggested that the Mw represented as a key factor controlling the mechanical properties of vulcanizates. This was because the higher average Mw provide the greater active sites available for crosslinking reaction, while the protein content governed the gel formation in the unvulcanized rubber.

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几个巴西橡胶树无性系品种天然橡胶的结构性质关系

本研究以RRIT251、PB235和RRIM600为研究对象，研究了未硫化橡胶的结构与硫化橡胶性能的关系。PB235克隆橡胶的拉伸性能最高，而RRIM600克隆橡胶的拉伸性能最低。PB235的平均分子量(Mw)最大，分子质量分布(MWD)最窄;RRIM600的平均分子量(Mw)最小，分子质量分布最宽。RRIM600蛋白含量最高，凝胶形成率最高。而PB235的蛋白质和凝胶含量最少。基于这一发现，结果清楚地表明，分子量是控制硫化胶力学性能的关键因素。这是因为较高的平均Mw为交联反应提供了更大的活性位点，而蛋白质含量控制了未硫化橡胶中的凝胶形成。

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

Progress in Rubber Plastics and Recycling Technology MATERIALS SCIENCE, COMPOSITES-POLYMER SCIENCE

CiteScore

4.40

自引率

7.70%

发文量

审稿时长

>12 weeks

期刊介绍： The journal aims to bridge the gap between research and development and the practical and commercial applications of polymers in a wide range of uses. Current developments and likely future trends are reviewed across key areas of the polymer industry, together with existing and potential opportunities for the innovative use of plastic and rubber products.