Comparative Study on the Transport Characteristics and Electrolyte Resistance of Brominated Butyl Rubber‐ and Natural Rubber‐Based Rubber Films Using the Mass Uptake Measurement

IF 3.6 4区工程技术 Q2 ENGINEERING, CHEMICAL

Polymer Engineering and Science Pub Date : 2025-06-20 DOI:10.1002/pen.70025

Zhenxing Liu, Min Zhang, Xiaolin Zhao, Song Gao, Guangyong Liu

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引用次数: 1

Abstract

ABSTRACT This study evaluates brominated butyl rubber (BIIR) and natural rubber (NR) as sealing materials for lithium‐ion batteries by investigating their electrolyte resistance. BIIR, synthesized through bromination of butyl rubber (IIR), demonstrates enhanced chemical stability and aging resistance due to its polar CBr bonds and dense molecular architecture. NR, composed primarily of cis‐1,4‐polyisoprene, offers superior elasticity and processability. Vulcanized samples of BIIR and NR are immersed in pure and mixed solutions of ethylene carbonate (EC), diethyl carbonate (DEC), and ethyl methyl carbonate (EMC) at 45°C, 60°C, and 80°C, respectively. Swelling behavior and transport properties are analyzed by calculating diffusion ( D ), solubility ( S ), and permeability ( P ) coefficients. Results reveal that BIIR exhibits 42%–58% lower swelling ratios than NR under high‐temperature (80°C) and polar electrolyte (EC‐rich) conditions due to its compact molecular structure. NR displays selective adsorption behavior, with transient mass increases of 15%–20% during initial solvent exposure. Temperature elevation accelerates transport rates, reducing equilibrium swelling time by 65%–72% for BIIR compared to NR. These findings establish BIIR as a promising candidate for high‐temperature battery sealing applications, while the cost‐effectiveness and resilience of NR, on the other hand, remain advantageous under moderate conditions.

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用质量摄取法比较溴化丁基橡胶与天然橡胶基橡胶薄膜的传输特性和耐电解质性能

摘要：本研究通过考察溴化丁基橡胶（BIIR）和天然橡胶（NR）作为锂离子电池密封材料的耐电解质性能来评价它们的性能。BIIR是通过丁基橡胶（IIR）的溴化合成的，由于其极性的C - Br键和致密的分子结构，具有增强的化学稳定性和耐老化性。NR主要由顺式1,4聚异戊二烯组成，具有优异的弹性和加工性。将BIIR和NR的硫化样品分别浸泡在纯碳酸乙烯酯（EC）、碳酸二乙酯（DEC）和碳酸甲酯（EMC）的混合溶液中，温度分别为45℃、60℃和80℃。通过计算扩散(D)、溶解度(S)和渗透率(P)系数来分析溶胀行为和输运性质。结果表明，由于BIIR分子结构紧凑，在高温（80℃）和极性电解质（富EC）条件下，其溶胀率比NR低42%-58%。NR表现出选择性吸附行为，在初始溶剂暴露过程中，瞬时质量增加15%-20%。与NR相比，温度升高加速了传输速率，BIIR的平衡膨胀时间减少了65%-72%。这些研究结果表明，BIIR是高温电池密封应用的有希望的候选者，而另一方面，NR的成本效益和弹性在中等条件下仍然具有优势。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polymer Engineering and Science 工程技术-高分子科学

CiteScore

5.40

自引率

18.80%

发文量

329

审稿时长

3.7 months

期刊介绍： For more than 30 years, Polymer Engineering & Science has been one of the most highly regarded journals in the field, serving as a forum for authors of treatises on the cutting edge of polymer science and technology. The importance of PE&S is underscored by the frequent rate at which its articles are cited, especially by other publications - literally thousand of times a year. Engineers, researchers, technicians, and academicians worldwide are looking to PE&S for the valuable information they need. There are special issues compiled by distinguished guest editors. These contain proceedings of symposia on such diverse topics as polyblends, mechanics of plastics and polymer welding.

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Diethyl carbonate
105-58-8

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Ethyl Methyl Carbonate
623-53-0

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Ethylene carbonate
96-49-1

￥19.00-￥12500.00

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