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热塑性硫化橡胶作为汽车燃料电池应用中的密封垫片的机械老化试验及密封性能

Mechanical Aging Test and Sealing Performance of Thermoplastic Vulcanizate as Sealing Gasket in Automotive Fuel Cell Applications.

作者信息

Im Hyungu, Jeoung Sunkyoung

机构信息

Material Technology R&D Division, Korea Automotive Technology Institute, Cheonan-si 31214, Republic of Korea.

出版信息

Polymers (Basel). 2023 Apr 13;15(8):1872. doi: 10.3390/polym15081872.

DOI:10.3390/polym15081872
PMID:37112019
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10145779/
Abstract

Ethylene-propylene-diene monomer (EPDM) rubber is one of the rapidly developing synthetic rubbers for use as a gasket material in proton exchange membrane (PEM) fuel cell applications. Despite its excellent elastic and sealing properties, EPDM faces challenges such as molding processability and recycling ability. To overcome these challenges, thermoplastic vulcanizate (TPV), which comprises vulcanized EPDM in polypropylene matrix, was investigated as a gasket material for PEM fuel cell applications. TPV showed better long-term stability in terms of tension and compression set behaviors under accelerated aging conditions than EPDM. Additionally, TPV exhibited significantly higher crosslinking density and surface hardness than EPDM, regardless of the test temperature and aging time. TPV and EPDM showed similar leakage rates for the entire range of test inlet pressure values, regardless of the applied temperature. Therefore, we can conclude that TPV exhibits a similar sealing capability with more stable mechanical properties compared with commercialized EPDM gaskets in terms of He leakage performance.

摘要

乙丙三元橡胶（EPDM）是一种快速发展的合成橡胶，用作质子交换膜（PEM）燃料电池应用中的垫片材料。尽管EPDM具有优异的弹性和密封性能，但它面临着诸如成型加工性和回收能力等挑战。为了克服这些挑战，研究了由聚丙烯基体中硫化EPDM组成的热塑性硫化胶（TPV）作为PEM燃料电池应用的垫片材料。在加速老化条件下，TPV在拉伸和压缩永久变形行为方面表现出比EPDM更好的长期稳定性。此外，无论测试温度和老化时间如何，TPV的交联密度和表面硬度均显著高于EPDM。无论施加的温度如何，TPV和EPDM在整个测试入口压力值范围内的泄漏率相似。因此，我们可以得出结论，就氦气泄漏性能而言，与商业化的EPDM垫片相比，TPV具有相似的密封能力，且机械性能更稳定。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/5f368d0c85a3/polymers-15-01872-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/ad512e760c2a/polymers-15-01872-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/2394d4bede51/polymers-15-01872-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/146bcb3388df/polymers-15-01872-g004a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/db9796694419/polymers-15-01872-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/d51dbfd1d8ac/polymers-15-01872-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/fb6b61a1663f/polymers-15-01872-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/5f368d0c85a3/polymers-15-01872-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/ad512e760c2a/polymers-15-01872-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/3cb761bd42b3/polymers-15-01872-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/2394d4bede51/polymers-15-01872-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/146bcb3388df/polymers-15-01872-g004a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/db9796694419/polymers-15-01872-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/d51dbfd1d8ac/polymers-15-01872-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/fb6b61a1663f/polymers-15-01872-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2041/10145779/5f368d0c85a3/polymers-15-01872-g008.jpg

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