Effects of Microstructure on Properties of Neodymium-based <italic style="font-style: italic">Cis</italic> Polybutadiene Rubber

Han Zhu; Zhu-jie Cheng; Tian-bao Liu; Sheng-li Liu; Guo-tian Wang; Yi-xian Wu

doi:10.11777/j.issn1000-3304.2022.22441

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Effects of Microstructure on Properties of Neodymium-based Cis Polybutadiene Rubber

Research Article | 更新时间：2023-09-25

- Effects of Microstructure on Properties of Neodymium-based Cis Polybutadiene Rubber
- ACTA POLYMERICA SINICA Vol. 54, Issue 8, Pages: 1176-1185(2023)
- 作者机构：
  
  1.北京化工大学化工资源有效利用国家重点实验室北京 100029
  2.中国石油化工股份公司北京燕山分公司北京 102503
- 作者简介：
  
  Yi-xian Wu, E-mail: wuyx@mail.buct.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2022.22441
  CLC：
- Published：20 August 2023，
  
  Published Online：10 April 2023，
  
  Received：21 December 2022，
  
  Accepted：20 February 2023
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朱寒,程竹杰,刘天保等.微观结构含量对稀土高顺式聚丁二烯性能的影响[J].高分子学报,2023,54(08):1176-1185.

Zhu Han,Cheng Zhu-jie,Liu Tian-bao,et al.Effects of Microstructure on Properties of Neodymium-based Cis Polybutadiene Rubber[J].ACTA POLYMERICA SINICA,2023,54(08):1176-1185.
朱寒,程竹杰,刘天保等.微观结构含量对稀土高顺式聚丁二烯性能的影响[J].高分子学报,2023,54(08):1176-1185. DOI： 10.11777/j.issn1000-3304.2022.22441.

Zhu Han,Cheng Zhu-jie,Liu Tian-bao,et al.Effects of Microstructure on Properties of Neodymium-based Cis Polybutadiene Rubber[J].ACTA POLYMERICA SINICA,2023,54(08):1176-1185. DOI： 10.11777/j.issn1000-3304.2022.22441.

摘要

采用羧酸钕催化剂体系催化丁二烯可控/活性配位聚合，制备了顺-1

4结构含量

98.0%的Nd-BR；采用膦酸酯钕催化剂体系催化丁二烯配位聚合制备了顺-1

4结构含量为94.9%的Nd-BR，并选择数均分子量(

)及分子量分布指数(

)接近但顺式结构含量不同的国外商业化产品进行对比，研究顺-1

4微观结构含量对其生胶及混炼胶加工性能、硫化胶物理机械性能及动态力学性能的影响. 结果表明：当稀土高顺式聚丁二烯顺-1

4结构含量由94.9%逐渐升高至98.8%时，生胶强度逐渐提升，应力松弛速率逐渐加快，改善了生胶及混炼胶加工性能，与炭黑混炼效果更优，在提高炭黑结合胶含量的同时降低了Payne效应. 少量顺式结构含量的提升可增强应变诱导结晶能力，从而可明显提升硫化胶拉伸强度和撕裂强度、耐磨性、耐刺扎性及耐屈挠裂口增长；降低轮胎滚动阻力的同时提高轮胎抗湿滑性，可以更好地平衡耐磨性、抗湿滑性及滚动阻力之间的矛盾，满足绿色轮胎“魔三角”的需求. 顺式含量~98.5%的独特结构和合适的分子量分布(~2.8)，赋予其优异的生胶加工性能、硫化胶物理机械性能及动态力学性能，适合于作为绿色轮胎橡胶原材料使用.

Abstract

Neodymium-based polybutadiene rubber (Nd-BR) with

cis-

4 content

98.0% was prepared by neodymium carboxylate-based catalyst system and Nd-BR with

cis-

4 content of 94.9% was prepared by neodymium phosphonate-based catalyst system. Commercial products with similar molecular weight (

) and molecular weight distribution (

) while different

cis-

4 contents were selected for comparison. The effects of

cis-

4 configuration on properties of Nd-BRs with similar 1

2-configuration content

molecular weight and distribution were investigated. The characteristic stress relaxation time (

) decreased obviously when the total content of 1

4- configuration (

cis-

4 and

trans

-1

4) is greater than 99%

and the

cis-

4 content increases from 94.9% to 98.8%

indicating the improvement of processability. The dispersion of carbon black in rubber and bound rubber content of Nd-BR composites were improved as well. The strain-induced crystallization capability was enhanced with the increase of a small amount of

cis-

4 content

which significantly improved the tensile strength

tear strength

wear resistance

puncture resistance and crack resistance. It is remarked that the rolling resistance and wet-skid resistance were increased with ultra-high

cis-

4 content of more than 98%. Nd-BR with ultrahigh

cis-

4 content of

. 98.5% and appropriate molecular weight distribution (

. 2.8) possessed excellent processing properties

mechanical properties and dynamic mechanical properties

which is suitable for the high-performance tires.

关键词

丁二烯稀土顺丁橡胶顺式结构动态力学性能

Keywords

ButadieneNeodymium-based cis polybutadiene rubberCis-14 configurationDynamic property

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State Key Laboratory of Polymer Physics and Chemistry, Changchun Institue of Applied Chemistry, Chinese Acadamy of Sciences

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Effects of Microstructure on Properties of Neodymium-based Cis Polybutadiene Rubber

DOI：10.11777/j.issn1000-3304.2022.22441

摘要

Abstract

关键词

Keywords

references