Impact of Composite Preservation System on the Vulcanization Performance of Natural Rubber Latex

Li-Guang Zhao; Yi-Qun Liu; Min-Min Chen; Jian-Wei Li; Tuo Dai; Shao-Xiang Ye; Wei-Qiang Liu; Tao Zhao; Hong-Xing Gui; Zhen-Xiang Xin

doi:10.1007/s10118-025-3374-y

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Impact of Composite Preservation System on the Vulcanization Performance of Natural Rubber Latex

RESEARCH ARTICLE | Updated：2025-08-25

- Impact of Composite Preservation System on the Vulcanization Performance of Natural Rubber Latex
- Chinese Journal of Polymer Science Vol. 43, Issue 9, Pages: 1638-1650(2025)
- Affiliations：
  
  a.College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266061, China
  b.Hainan Natural Rubber Technology Innovation Center, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
  c.Sanya Institute of Quality and Technology Supervision of Hainan Province, Sanya 572099, China
- Author bio：
  
  guihongxing@263.net (H.X.G.)
  xzx@qust.edu.cn (Z.X.X.)
- Funds：
- DOI：10.1007/s10118-025-3374-y
  CLC：
- Received：16 February 2025，
  
  Revised：24 April 2025，
  
  Accepted：02 May 2025，
  
  Published Online：18 June 2025，
  
  Published：05 September 2025
- Accepted：
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Zhao, L. G.; Liu, Y. Q.; Chen, M. M.; Li, J. W.; Dai, T.; Ye, S. X.; Liu, W. Q.; Zhao, T.; Gui, H. X.; Xin, Z. X. Impact of composite preservation system on the vulcanization performance of natural rubber latex. Chinese J. Polym. Sci. 2025, 43, 1638–1650

Li-Guang Zhao, Yi-Qun Liu, Min-Min Chen, et al. Impact of Composite Preservation System on the Vulcanization Performance of Natural Rubber Latex[J]. Chinese journal of polymer science, 2025, 43(9): 1638-1650.
Zhao, L. G.; Liu, Y. Q.; Chen, M. M.; Li, J. W.; Dai, T.; Ye, S. X.; Liu, W. Q.; Zhao, T.; Gui, H. X.; Xin, Z. X. Impact of composite preservation system on the vulcanization performance of natural rubber latex. Chinese J. Polym. Sci. 2025, 43, 1638–1650 DOI： 10.1007/s10118-025-3374-y.

Li-Guang Zhao, Yi-Qun Liu, Min-Min Chen, et al. Impact of Composite Preservation System on the Vulcanization Performance of Natural Rubber Latex[J]. Chinese journal of polymer science, 2025, 43(9): 1638-1650. DOI： 10.1007/s10118-025-3374-y.

摘要

The thioacetamide derivative composite preservation system significantly enhances the vulcanization efficiency and mechanical properties of NR latex. Compared to 2-imidazolidinethione and 3-hydroxypyridine

it demonstrates superior performance in promoting crosslinking density and mechanical strength

suggesting that the thioamide and pyridine groups work synergistically to facilitate the vulcanization of NR.

Abstract

The thioacetamide derivative (TD)-composite preservation system (TDCPS) exhibits superior preservation effects on natural rubber latex (NRL) and significantly enhances its vulcanization efficiency and mechanical properties. This study primarily investigated the principal chemical groups and mechanism of action of TDCPS in promoting NRL vulcanization through a comparative analysis. The results indicated that the key functional groups (thioamide and pyridine) in TDCPS synergistically accelerated crosslinking

reducing the vulcanization time by 41.18% compared to the high-ammonia (HA) preservation system. At an optimal TDCPS dosage of 5 mmol·L

–1

vulcanized films achieved a tensile strength of 34.18 MPa

with a sulfur content of 1.5 phr further improving the strength by 42.26%. TD outperformed the conventional accelerators 2-imidazolidinet

hione (ETU) and 3-hydroxypyridine (3-Hp) in promoting the crosslinking density and mechanical performance while eliminating ammonia-related environmental risks. This eco-friendly system demonstrates the industrial potential for sustainable rubber production.

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