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通过共价网络和离子网络的结合增强三元乙丙橡胶交联弹性性能

Enhancement of EPDM Crosslinked Elastic Properties by Association of Both Covalent and Ionic Networks.

作者信息

Larrue Chloé, Bounor-Legaré Véronique, Cassagnau Philippe

机构信息

Ingénierie des Matériaux Polymères, Univ-Lyon, Université Claude Bernard Lyon 1, 69622 Villeurbanne, France.

出版信息

Polymers (Basel). 2021 Sep 18;13(18):3161. doi: 10.3390/polym13183161.

DOI:10.3390/polym13183161
PMID:34578061
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8473281/
Abstract

The objective of this study was to replace elastomer crosslinking based on chemical covalent bonds by reversible systems under processing. One way is based on ionic bonds creation, which allows a physical crosslinking while keeping the process reversibility. However, due to the weak elasticity recovery of such a physical network after a long period of compression, the combination of both physical and chemical networks was studied. In that frame, an ethylene-propylene-diene terpolymer grafted with maleic anhydride (EPDM-g-MA) was crosslinked with metal salts and/or dicumyl peroxide (DCP). Thus, the influence of these two types of crosslinking networks and their combination were studied in detail in terms of compression set. The second part of this work was focused on the influence of different metallic salts (KOH, ZnAc) and the sensitivity to the water of the physical crosslinking network. Finally, the combination of ionic and covalent network allowed combining the processability and better mechanical properties in terms of recovery elasticity. KAc proved to be the best ionic candidate to avoid water degradation of the ionic network and then to preserve the elasticity recovery properties under aging.

摘要

本研究的目的是在加工过程中用可逆体系取代基于化学共价键的弹性体交联。一种方法是基于离子键的形成，它允许进行物理交联同时保持过程的可逆性。然而，由于这种物理网络在长时间压缩后的弹性恢复较弱，因此研究了物理和化学网络的组合。在此框架下，将接枝有马来酸酐的乙烯-丙烯-二烯三元共聚物（EPDM-g-MA）与金属盐和/或过氧化二异丙苯（DCP）进行交联。因此，从压缩永久变形方面详细研究了这两种交联网络及其组合的影响。这项工作的第二部分集中于不同金属盐（KOH、ZnAc）的影响以及物理交联网络对水的敏感性。最后，离子网络和共价网络的组合在恢复弹性方面实现了加工性能和更好机械性能的结合。事实证明，KAc是避免离子网络水降解从而在老化条件下保持弹性恢复性能的最佳离子候选物。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/bfa1e3b169c3/polymers-13-03161-g010a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/141ea68bfa0a/polymers-13-03161-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/9b1f18225fbf/polymers-13-03161-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/6f1ddfe375e4/polymers-13-03161-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/8bb42c944e19/polymers-13-03161-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/bbe4c3463743/polymers-13-03161-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/09f703b90af7/polymers-13-03161-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/d1004790bc52/polymers-13-03161-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/ae32e6d960fc/polymers-13-03161-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/dc983e53dee2/polymers-13-03161-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/bfa1e3b169c3/polymers-13-03161-g010a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/141ea68bfa0a/polymers-13-03161-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/9b1f18225fbf/polymers-13-03161-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/6f1ddfe375e4/polymers-13-03161-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/8bb42c944e19/polymers-13-03161-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/bbe4c3463743/polymers-13-03161-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/09f703b90af7/polymers-13-03161-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/d1004790bc52/polymers-13-03161-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/ae32e6d960fc/polymers-13-03161-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/dc983e53dee2/polymers-13-03161-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1442/8473281/bfa1e3b169c3/polymers-13-03161-g010a.jpg

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