Efficient Chemical Degradation of Styrene‐butadiene Rubber Vulcanizate toLiquid Rubber by a Synergistic Catalytic System of Cp2ZrCl2/LiAlH4

ZHANG Hua; YANG Qi; ZHANG Xue-quan; LIU Heng

doi:10.14028/j.cnki.1003-3726.2026.26.121

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Efficient Chemical Degradation of Styrene‐butadiene Rubber Vulcanizate toLiquid Rubber by a Synergistic Catalytic System of Cp₂ZrCl₂/LiAlH₄

更新时间：2026-07-27

- Efficient Chemical Degradation of Styrene‐butadiene Rubber Vulcanizate toLiquid Rubber by a Synergistic Catalytic System of Cp₂ZrCl₂/LiAlH₄
- Polymer Bulletin Vol. 39, Issue 8, Pages: 1484-1492(2026)
- 作者机构：
  
  青岛科技大学高分子科学与工程学院高性能有机光学聚合物与先进制造技术全国重点实验室橡塑材料与工程教育部重点实验室　青岛 266042
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2026.26.121
  CLC：
- Received：03 March 2026，
  
  Accepted：07 May 2026，
  
  Online First：09 July 2026，
  
  Published：20 August 2026
- 稿件说明：
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张华, 杨奇, 张学全, 刘恒. 基于Cp2ZrCl2/LiAlH4的协同催化体系用于硫化丁苯橡胶的高效化学降解制备液体橡胶. 高分子通报, 2026, 39(8), 1484–1492.

Zhang, H.; Yang, Q.; Zhang, X. Q.; Liu, H. Efficient chemical degradation of styrene‐butadiene rubber vulcanizate to liquid rubber by a synergistic catalytic system of Cp2ZrCl2/LiAlH4. Polym. Bull. (in Chinese), 2026, 39(8), 1484–1492.
张华, 杨奇, 张学全, 刘恒. 基于Cp2ZrCl2/LiAlH4的协同催化体系用于硫化丁苯橡胶的高效化学降解制备液体橡胶. 高分子通报, 2026, 39(8), 1484–1492. DOI： 10.14028/j.cnki.1003-3726.2026.26.121.

Zhang, H.; Yang, Q.; Zhang, X. Q.; Liu, H. Efficient chemical degradation of styrene‐butadiene rubber vulcanizate to liquid rubber by a synergistic catalytic system of Cp2ZrCl2/LiAlH4. Polym. Bull. (in Chinese), 2026, 39(8), 1484–1492. DOI： 10.14028/j.cnki.1003-3726.2026.26.121.

摘要

构筑了一种简便高效的Cp

ZrCl

/LiAlH

协同催化体系，用于丁苯硫化橡胶的化学降解，成功制备出一系列具有不同分子参数的液体丁苯橡胶。通

过调控催化剂用量、组分配比等反应条件，系统考察了该催化体系对非炭黑填充硫化丁苯橡胶、炭黑填充硫化丁苯橡胶及废旧轮胎胎面胶的降解行为，建立了其对所得液体丁苯橡胶收率与分子量的影响规律。研究结果表明，Cp

ZrCl

/LiAlH

催化剂用量与丁苯硫化胶降解效率呈正相关：催化剂用量越高，丁苯硫化胶降解效率越高，所得液体丁苯橡胶收率也越高(最高可接近100%)，同时产物分子量越低(可低至1.74×10

g/mol)。对降解产物的微观结构表征结果显示，其结构与原料丁苯橡胶基本类似，仅伴随少量饱和序列结构的生成。

Abstract

A simple and efficient synergistic catalytic system consisting of Cp

ZrCl

/LiAlH

was developed for the chemical degradation of styrene-butadiene rubber (SBR) vulcanizate

yielding liquid styrene-butadiene rubber with various molecular parameters as the final recycled product. By tuning the reaction conditions

including the catalyst loading and molar ratio of the components

the degradation behavior of the catalytic system toward unfilled SBR

carbon-black-filled SBR

and waste tire tread rubber was systematically investigated. The degradation efficiency of SBR vulcanizates was positively correlated with the concentration of the Cp

ZrCl

/LiAlH

catalyst: higher catalyst concentrations resulted in enhanced degradation efficiency and improved yield of liquid styrene-butadiene rubber (up to nearly 100%)

accompanied by a lower molecular weight of the product (as low as 1.74×10

g/mol). Microstructural characterization of the degraded products indicated that their structure was generally consistent with that of pristine SBR

with only a small amount of newly formed saturated sequences.

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