Studies on Multilayer Microstructure of Nanosilica Filled Carboxylated Styrene-Butadiene Rubber

Yang Rui-quan; Song Yi-hu; Zheng Qiang

doi:10.11777/j.issn1000-3304.2016.16025

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Studies on Multilayer Microstructure of Nanosilica Filled Carboxylated Styrene-Butadiene Rubber

Research Article | 更新时间：2021-03-19

- Studies on Multilayer Microstructure of Nanosilica Filled Carboxylated Styrene-Butadiene Rubber
- Acta Polymerica Sinica Issue 10, Pages: 1425-1430(2016)
- 作者机构：
  
  高分子合成与功能构造教育部重点实验室浙江大学高分子科学与工程学系杭州 310027
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2016.16025
  CLC：
- Published：2016-10，
  
  Received：20 January 2016，
  
  Revised：20 January 2016，
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Yang Rui-quan, Song Yi-hu, Zheng Qiang. Studies on Multilayer Microstructure of Nanosilica Filled Carboxylated Styrene-Butadiene Rubber. [J]. Acta Polymerica Sinica (10):1425-1430(2016)
DOI：

Yang Rui-quan, Song Yi-hu, Zheng Qiang. Studies on Multilayer Microstructure of Nanosilica Filled Carboxylated Styrene-Butadiene Rubber. [J]. Acta Polymerica Sinica (10):1425-1430(2016) DOI： 10.11777/j.issn1000-3304.2016.16025.

摘要

分别采用悬浮液吸附混合法、胶乳混合并开炼法制备填充份数0~300 phr、0~60 phr的羧基丁苯橡胶/白炭黑（XSBR/A200）复合物，采用温度调制示差扫描量热法（TMDSC）研究复合物的玻璃化转变行为，采用动态流变法研究A200的补强机理.TMDSC测试结果显示，粒子表面“玻璃化层”含量与填充份数呈线性关系，且与混合方式无关.流变与TMDSC测试结果对比显示，A200粒子表面存在两层分子能动性不同的受限层，其中玻璃化层内层不能发生玻璃化转变，“受限外层”可发生玻璃化转变，但在高频下呈刚性行为.根据等价球形模型，在半径为6.8 nm的A200粒子表面，玻璃化层与“受限外层”厚度分别为1.0和1.6 nm.

Abstract

Carboxylated styrene-butadiene rubber/nanosilica (XSBR/A200) composites with an extraodinarily wide range of A200 loading (0-300 phr) were prepared by absorption mixing. The composites with 0-60 phr of A200 were also been fabricated by latex mixing plus extra open-milling methods.Temperature modulated differential scanning calorimetry (TMDSC) was used to investigate glass-transition behavior of composites prepared by both methods

while dynamic rheology tests were carried out to investigate the reinforcement of the compounds prepared by the latex mixing plus extra open-milling methods.TMDSC results show that the content of the glassy layer immobilized in the close vicinity of A200 nanoparticles increases proportionally with silica loading regardless of mixing methods.Comparision between TMDSC and rheology results indicates that there exists an outer absorption layer besides the glassy layer in compounds.The glassy layer corresponds to the XBSR fraction surrounding nanosilica that does not undergo glass transtion.On the other hand

the outer layer is able to undergo glass transition together with the bulky rubber phase but it behaves rigidly at high frequencies.These two layers contribute both to the reinforcement effect.Assuming equivalent A200 spheres of 6.8 nm in radius

equivalent thicknesses of the glassy and outer layers are estimated as 1.0 nm and 1.6 nm

respectively.

关键词

羧基丁苯橡胶(XSBR)白炭黑固定化层温度调制示差扫描量热(TMDSC)动态流变

Keywords

Carboxylated styrene-butadiene rubber (XSBR)NanosilicaGlassy layerTemperature modulated differential scanning calorimetry (TMDSC)Rheoloy

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