The Effect of the Microstructure of Liquid Polybutadiene on the Properties of Styrene-butadiene Rubber

SUN Qing-gang; MA De-long; LI Yun-feng; WANG Qian; WANG Hong-kui; YANG Zhen-lin; ZHANG Bao-ning; SUN Yu

doi:10.14028/j.cnki.1003-3726.2025.25.288

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The Effect of the Microstructure of Liquid Polybutadiene on the Properties of Styrene-butadiene Rubber

更新时间：2026-01-28

- The Effect of the Microstructure of Liquid Polybutadiene on the Properties of Styrene-butadiene Rubber
- Polymer Bulletin Vol. 39, Issue 2, Pages: 280-286(2026)
- 作者机构：
  
  山东阳谷华泰化工股份有限公司　阳谷 252300
  青岛科技大学高分子科学与工程学院　青岛 266042
  山东华泰新材料技术研发有限公司　阳谷 252300
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2025.25.288
  CLC：
- Received：28 September 2025，
  
  Accepted：19 November 2025，
  
  Published Online：08 January 2026，
  
  Published：20 February 2026
- 稿件说明：
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孙庆刚, 马德龙, 李云峰, 王茜, 王洪奎, 杨振林, 张保宁, 孙宇. 液体聚丁二烯微观结构对丁苯橡胶性能的影响. 高分子通报, 2026, 39(2), 280–286.

Sun, Q. G.; Ma, D. L.; Li, Y. F.; Wang, Q.; Wang, H. K.; Yang, Z. L.; Zhang, B. N.; Sun, Y. The effect of the microstructure of liquid polybutadiene on the properties of styrene-butadiene rubber. Polym. Bull. (in Chinese), 2026, 39(2), 280–286.
孙庆刚, 马德龙, 李云峰, 王茜, 王洪奎, 杨振林, 张保宁, 孙宇. 液体聚丁二烯微观结构对丁苯橡胶性能的影响. 高分子通报, 2026, 39(2), 280–286. DOI： 10.14028/j.cnki.1003-3726.2025.25.288.

Sun, Q. G.; Ma, D. L.; Li, Y. F.; Wang, Q.; Wang, H. K.; Yang, Z. L.; Zhang, B. N.; Sun, Y. The effect of the microstructure of liquid polybutadiene on the properties of styrene-butadiene rubber. Polym. Bull. (in Chinese), 2026, 39(2), 280–286. DOI： 10.14028/j.cnki.1003-3726.2025.25.288.

摘要

系统考察了液体聚丁二烯(LPB)分子量及微观结构对丁苯橡胶性能的影响。采用核磁共振(NMR)与凝胶渗透色谱(GPC)对LPB的微观结构和分子量进行表征，并通过对比环保芳烃油(TDAE)，研究LPB在丁苯橡胶中的应用效果。结果表明，LPB作为加工助剂可有效降低混炼胶门尼黏度并改善填料分散，表现出优异的增塑性能。LPB的引入延长了混炼胶焦烧时间和硫化时间，但因其部分双键参与交联，导致橡胶交联密度下降，使硫化胶拉伸强度和定伸应力略低于TDAE体系，通过增加硫磺用量可提升其定伸应力与拉伸强度。与TDAE油相比，LPB赋予硫化胶更优异的耐磨性能，并降低材料在60 ℃处的tan

值，有利于改善其滚动阻力。LPB同时会降低0 ℃处的tan

值，削弱材料抗湿滑性能，但通过提高LPB中1

2-结构单元含量，能够提升0 ℃处的tan

值，而不影响60 ℃处tan

值。此外，提高含LPB硫化胶的交联密度，能够进一步降低60 ℃处tan

值。最后，本研究发现在液体橡胶3000~7000 g/mol分子量范围内，在包含LPB的硫化胶中，调整LPB的分

子量和1

2-单元含量对材料加工性能、填料分散、硫化特性及耐磨性能影响并不显著。

Abstract

Systematically investigated the influence of molecular weight and microstructure of liquid polybutadiene (LPB) on the properties of styrene-butadiene rubber (SBR). The microstructure and molecular weight of LPB were characterized by nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC). The performance of LPB as a processing aid was compared with that of treated distillate aromatic extract (TDAE) oil. The results showed that LPB effectively reduced Mooney viscosity and improved filler dispersion in compound

demonstrating excellent plasticizing ability. The incorporation of LPB prolonged scorch time and cure time of compounds. However

due to the consumption of curatives by LPB

the crosslink density of the vulcanizates containing LPB decreased

resulting in slightly lower tensile strength and modulus compared with the TDAE-based compound. By increasing the sulfur loading

the modulus and tensile strength of compounds containing LPB could be significantly improved. Compared with TDAE oil

LPB imparted superior abrasion resistance to the vulcanizates and reduced the tan

at 60 ℃

indicating improved rolling resistance. On the other hand

LPB reduced the tan

at 0 ℃

suggesting a potential decrease in wet skid resistance. Increasing the proportion of 1

2-units in LPB raised the tan

at 0 ℃ without affecting the tan

at 60 ℃

while increasing the crosslink density of compound containing LPB further decreased the tan

at 60 ℃. Finally

within the molecular weight range of 3000–7000 g/mol

the variations in molecular weight and 1

2-unit content of LPB in vulcanizates containing LPB exhibited limited effects on processing performance

filler dispersion

curing characteristics

and abrasion resistance. These findings suggest that LPB is a reactive and environmentally friendly processing aid with signifi

cant potential to replace TDAE oil in green tire formulations.

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references

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