Effect of Cross-Linking Density of Powdered Rubber on Gas Barrier Property and CO<sub>2</sub> Permselectivity of NR/BR Composites

Peng-Cheng Xia; Hua-Feng Shao; Ai-Hua He

doi:10.1007/s10118-024-3238-x

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Effect of Cross-Linking Density of Powdered Rubber on Gas Barrier Property and CO₂ Permselectivity of NR/BR Composites

RESEARCH ARTICLE | Updated：2024-12-31

- Effect of Cross-Linking Density of Powdered Rubber on Gas Barrier Property and CO₂ Permselectivity of NR/BR Composites
- Effect of Cross-Linking Density of Powdered Rubber on Gas Barrier Property and CO₂ Permselectivity of NR/BR Composites
- 高分子科学（英文） 2025年43卷第1期页码：199-210
- Affiliations：
  
  Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization, Key Laboratory of Rubber-Plastics (Ministry of Education)/ Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science and Technology, Qingdao 266042, China
- Author bio：
  
  shaohf0826@msn.com (H.F.S.)
  aihuahe@iccas.ac.cn (A.H.H.)
- Funds：
  
  This work was financially supported by the National Key Research and Development Program of China (No. 2022YFB3704700(2022YFB3704702)), the National Natural Science Foundation of China (No. 52473096), Major Scientific and Technological Innovation Project of Shandong Province (No. 2021CXGC010901), and Taishan Scholar Program.
- DOI：10.1007/s10118-024-3238-x
  中图分类号：
- 收稿：2024-08-16，
  
  修回：2024-09-13，
  
  录用：2024-09-16，
  
  网络首发：2024-11-14，
  
  纸质出版：2025-01-01
- Accepted：
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Xia, P. C.; Shao, H. F.; He, A. H. Effect of cross-linking density of powdered rubber on gas barrier property and CO₂ permselectivity of NR/BR composites. Chinese J. Polym. Sci. 2025, 43, 199–210 DOI: 10.1007/s10118-024-3238-x.

Peng-Cheng Xia, Hua-Feng Shao, Ai-Hua He. Effect of Cross-Linking Density of Powdered Rubber on Gas Barrier Property and CO₂ Permselectivity of NR/BR Composites[J]. Chinese Journal of Polymer Science, 2025, 43(1): 199-210. DOI: 10.1007/s10118-024-3238-x.
Xia, P. C.; Shao, H. F.; He, A. H. Effect of cross-linking density of powdered rubber on gas barrier property and CO₂ permselectivity of NR/BR composites. Chinese J. Polym. Sci. 2025, 43, 199–210 DOI: 10.1007/s10118-024-3238-x. DOI：

Peng-Cheng Xia, Hua-Feng Shao, Ai-Hua He. Effect of Cross-Linking Density of Powdered Rubber on Gas Barrier Property and CO₂ Permselectivity of NR/BR Composites[J]. Chinese Journal of Polymer Science, 2025, 43(1): 199-210. DOI: 10.1007/s10118-024-3238-x. DOI：

摘要

The uniformly dispersed pVTPR acts as a filler in the rubber matrix and greatly extends the path of N

and O

through the composites

which gives the composites excellent gas barrier properties. As the pVTPR cross-linking density increased

the gas-barrier properties of the composites gra

dually improved.

Abstract

In this study

a novel cost-effective methodology was developed to enhance the gas barrier properties and permselectivity of unfilled natural rubber (NR)/polybutadiene rubber (BR) composites through the construction of a heterogeneous structure using pre-vulcanized powder rubber to replace traditional fillers. The matrix material is composed of a blend of NR and BR

which is widely used in tire manufacturing. By incorporating pre-vulcanized

trans

-1

4-poly(isoprene-

-butadiene) (TBIR) rubber powder (pVTPR) with different cross-linking densities and contents

significant improvements in the gas barrier properties and CO

permselectivity of the NR/BR/pVTPR composites were observed. The results indicated that compared to NR/BR/TBIR composites prepared through direct blending of NR

and TBIR

the NR/BR/pVTPR composites exhibited markedly superior gas barrier properties. Increasing the cross-linking density of pVTPR resulted in progressive enhancement of the gas barrier properties of the NR/BR/pV

TPR composite. For example

the addition of 20 phr pVTPR with a cross-linking density of 346 mol/m

resulted in a 79% improvement in the oxygen barrier property of NR/BR/pVTPR compared to NR/BR

achieving a value of 5.47×10

−14

·cm·cm

−2

·s

−1

·Pa

−1

. Similarly

the nitrogen barrier property improved by 76% compared to NR/BR

reaching 2.4×10

−14

·cm·cm

−2

·s

−1

·Pa

−1

which is 28 % higher than the conventional inner liner material brominated butyl rubber (BIIR

=3.32×10

−14

·cm·cm

−2

·s

−1

·Pa

−1

). Owing to its low cost

exceptional gas barrier properties

superior adhesion to various tire components

and co-vulcanization capabilities

the NR/BR/pVTPR composite has emerged as a promising alternative to butyl rubber in the inner liner of tires. Furthermore

by fine-tuning the cross-linking density of pVTPR

the high-gas-barrier NR/BR/pVTPR composites also demonstrated remarkable CO

permselectivity

with a CO

selectivity of 61.4 and a CO

selectivity of 26.12. This innovation provides a novel strategy for CO

capture and separation

with potential applications in future environmental and industrial processes. The multifunctional NR/BR/pVTPR composite

with its superior gas barrier properties and CO

permselectivity

is expected to contribute to the development of safer

greener

and more cost-effective transportation solutions.

关键词

Keywords

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2026-9 Contents

Effect of Cross-Linking Density of Powdered Rubber on Gas Barrier Property and CO2 Permselectivity of NR/BR Composites

Effect of Cross-Linking Density of Powdered Rubber on Gas Barrier Property and CO2 Permselectivity of NR/BR Composites

DOI：10.1007/s10118-024-3238-x

摘要

Abstract

关键词

Keywords

references

Effect of Cross-Linking Density of Powdered Rubber on Gas Barrier Property and CO₂ Permselectivity of NR/BR Composites

Effect of Cross-Linking Density of Powdered Rubber on Gas Barrier Property and CO₂ Permselectivity of NR/BR Composites