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Accelerated Storage Induced Structural Evolution in Natural Rubber: A Comparative Study of Two Constant Viscosity Treatment Methods

文献类型： 外文期刊

作者： Yun, Danhua 1 ; Peng, Wenfeng 2 ; Lin, Hongtu 2 ; Liao, Jianhe 1 ; Liao, Lusheng 2 ;

作者机构： 1.Hainan Univ, Sch Mat Sci & Engn, Haikou 570228, Peoples R China

2.Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Hainan Prov Key Lab Nat Rubber Proc, Zhanjiang 524001, Peoples R China

关键词： constant viscosity natural rubber; accelerated storage; dry-mixing method; latex-mixing method

期刊名称：POLYMERS （ 影响因子：4.9； 五年影响因子：5.2 ）

ISSN：

年卷期： 2025 年 17 卷 7 期

页码：

收录情况： SCI

摘要： In order to compare the effects of current mainstream preparation methods for the constant viscosity natural rubber (CV) on structure during storage, this study used dry-mixing and latex-mixing methods to prepare the CV. The variation in mesostructure and microstructure of the CV prepared by the two constant viscosity treatment methods after accelerated storage for 48 h was analyzed. The result shows that both methods for preparing the CV can keep the macrogel content almost consistent after accelerated storage, while the microgel(>1 mu) content increased slightly. Meanwhile, both methods for preparing the CV can also stably maintain the molecular weight, the molecular weight distribution, and the shape of molecular chains after accelerated storage. However, the CV prepared by dry-mixing method demonstrated superior constant viscosity performance in Mooney viscosity (ML) and Wallace plasticity (P-0) during accelerated storage. The latex-mixing method for preparing the CV showed better advantage in preserving the number of branches per chain during accelerated storage.

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