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
- Chinese Journal of Polymer Science Vol. 43, Issue 1, Pages: 199-210(2025)
- 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：
- DOI：10.1007/s10118-024-3238-x
  CLC：
- Received：16 August 2024，
  
  Revised：2024-09-13，
  
  Accepted：16 September 2024，
  
  Online First：14 November 2024，
  
  Published：01 January 2025
- 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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⁰

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