Influence of Dispersoid Particle Size on the Morphology and Mechanical Properties of Natural Rubber With Island‐Nanomatrix Structure

IF 3.8 4区工程技术 Q2 POLYMER SCIENCE

Polymers for Advanced Technologies Pub Date : 2025-10-01 DOI:10.1002/pat.70393

Yuanbing Zhou, Gongming Luo, Sujitra Onutai, Kanoktip Boonkerd, Seiichi Kawahara, Shuangquan Liao

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引用次数: 0

Abstract

ABSTRACT The influence of the dispersoid particle size variation on the morphological characteristics and mechanical properties of natural rubber (NR) with polystyrene island‐nanomatrix structure was investigated in this study. Fresh NR latex was incubated with urea and then processed through a series of centrifugation and redispersion steps at different forces to fractionate it into four low protein NR (LPNR) with average diameters of 238, 492, 721, and 1102 nm. Subsequently, graft copolymerization of styrene onto LPNR particles was carried out in the latex stage to prepare the NR with a polystyrene island‐nanomatrix structure. The relationship among particle size, morphology, and mechanical properties of the graft copolymer was analyzed. Transmission electron microscopy observations confirmed the formation of polystyrene island‐nanomatrix structure in each graft copolymer and revealed that the compactness of nanomatrix network increased as NR particle size decreased. The effect of nanomatrix network compactness on the mechanical properties was investigated through measurements of tensile properties, tear resistance properties, and viscoelastic properties, supported by digital image correlation strain mapping technology. A higher nanomatrix compactness was found to enhance mechanical properties and result in a more homogeneous distribution of strain.

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分散体粒径对岛状纳米基结构天然橡胶形貌和力学性能的影响

摘要：研究了分散体粒径变化对具有聚苯乙烯岛纳米基体结构的天然橡胶（NR）形态特征和力学性能的影响。将新鲜的NR乳胶与尿素孵育，然后在不同的力下进行离心和再分散，将其分离成平均直径为238、492、721和1102 nm的4种低蛋白NR （LPNR）。随后，在乳胶阶段将苯乙烯接枝共聚到LPNR颗粒上，制备出具有聚苯乙烯岛纳米基质结构的NR。分析了接枝共聚物的粒径、形貌和力学性能之间的关系。透射电镜观察证实了接枝共聚物中聚苯乙烯岛-纳米基质结构的形成，并揭示了纳米基质网络的致密性随着NR粒径的减小而增加。在数字图像相关应变映射技术的支持下，通过拉伸性能、抗撕裂性能和粘弹性性能的测量，研究了纳米矩阵网络致密度对力学性能的影响。研究发现，较高的纳米基质致密性可以提高机械性能，并导致更均匀的应变分布。

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来源期刊

Polymers for Advanced Technologies 工程技术-高分子科学

CiteScore

6.20

自引率

5.90%

发文量

337

审稿时长

2.1 months

期刊介绍： Polymers for Advanced Technologies is published in response to recent significant changes in the patterns of materials research and development. Worldwide attention has been focused on the critical importance of materials in the creation of new devices and systems. It is now recognized that materials are often the limiting factor in bringing a new technical concept to fruition and that polymers are often the materials of choice in these demanding applications. A significant portion of the polymer research ongoing in the world is directly or indirectly related to the solution of complex, interdisciplinary problems whose successful resolution is necessary for achievement of broad system objectives. Polymers for Advanced Technologies is focused to the interest of scientists and engineers from academia and industry who are participating in these new areas of polymer research and development. It is the intent of this journal to impact the polymer related advanced technologies to meet the challenge of the twenty-first century. Polymers for Advanced Technologies aims at encouraging innovation, invention, imagination and creativity by providing a broad interdisciplinary platform for the presentation of new research and development concepts, theories and results which reflect the changing image and pace of modern polymer science and technology. Polymers for Advanced Technologies aims at becoming the central organ of the new multi-disciplinary polymer oriented materials science of the highest scientific standards. It will publish original research papers on finished studies; communications limited to five typewritten pages plus three illustrations, containing experimental details; review articles of up to 40 pages; letters to the editor and book reviews. Review articles will normally be published by invitation. The Editor-in-Chief welcomes suggestions for reviews.