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Open Access Article

Novel Chemical Reactions and Mechanisms. 2024; 1: (1) ; 6-12 ; DOI: 10.12208/j.ncrm.20240002.

Effect of Fumed Silica Filler on Rheological and Mechanical Properties of Polysulfide Sealant
气相二氧化硅填料对聚硫密封胶流变性和力学性能的影响

作者: Zhihui Zhang, Bihe Jiang *, Siyuan Liu, Dazhen Li, Jianze Shi

沈阳化工研究院 辽宁沈阳

*通讯作者: Bihe Jiang,单位:沈阳化工研究院 辽宁沈阳;

发布时间: 2024-11-22 总浏览量: 118

摘要

本文分别以气硅和疏水气硅与液体聚硫橡胶JLY155制备了两种填充聚合物,研究了比表面积为150~380 m2 /g的气硅对填充聚合物LP/SiO2流变性的影响。结果表明,两种气硅的储能模量(G')和复合黏度(η)均随比表面积的增加而增大,而线性黏弹区变窄,黏度明显下降;与亲水气硅相比,疏水气硅的线性黏弹区宽度较窄。将不同气硅制备的填充聚合物进行力学性能测试,硫化制成聚硫密封胶,经测试力学性能发现,疏水HB150、HB200、HB380的拉伸强度较高。此外,断裂伸长率随比表面积的减小而增大。这一发现为聚硫密封胶配方和制备中气相硅的工艺条件提供了有价值的见解。

关键词: 气相二氧化硅;填充聚合物;聚硫密封剂

Abstract

In this paper, two types of filled polymers were prepared using gas-silicone and hydrophobic gas-silicon combined with liquid polysulfide rubber JLY155. The study investigated the impact of gas-silicon with specific surface areas ranging from 150-380 m2/g on the rheology of the filled polymer LP/SiO2. The results indicated that the storage modulus (G') and composite viscosity (η) of both types of gas-silicon increased with the specific surface area, while the linear viscoelastic region narrowed, and the viscosity decreased significantly. When compared to hydrophilic gas silicon, hydrophobic gas silicon has a narrower linear viscoelastic region width. The mechanical properties of the filled polymers prepared using different gas silicons are vulcanized to create polysulfide sealants. Upon testing the mechanical properties, it was discovered that the tensile strength of hydrophobic HB150, HB200, and HB380 is higher. Additionally, the elongation at break increases with the decrease in specific surface area. This finding offers valuable insights into the process conditions of gas silicon in polysulfide sealant formulation and preparation.

Key words: Fumed silica; Filled with polymers; Polysulfide sealant

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引用本文

ZhihuiZhang, BiheJiang, SiyuanLiu, DazhenLi, JianzeShi, 气相二氧化硅填料对聚硫密封胶流变性和力学性能的影响[J]. 新型化学反应与机制, 2024; 1: (1) : 6-12.