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在氧化银（AgO）存在下氢化丙烯腈-丁二烯橡胶（HNBR）与氯丁橡胶（CR）共混物交联过程中发生的弹性体间反应及硫化产物的力学性能

Interelastomer Reactions Occurring during the Cross-Linking of Hydrogenated Acrylonitrile-Butadiene (HNBR) and Chloroprene (CR) Rubbers Blends in the Presence of Silver(I) Oxide (AgO) and Mechanical Properties of Cured Products.

作者信息

Smejda-Krzewicka Aleksandra, Mrozowski Konrad, Strzelec Krzysztof

机构信息

Institute of Polymer and Dye Technology, Lodz University of Technology, Stefanowskiego Street 16, 90-537 Lodz, Poland.

出版信息

Materials (Basel). 2023 Jun 25;16(13):4573. doi: 10.3390/ma16134573.

DOI:10.3390/ma16134573
PMID:37444887
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10342298/
Abstract

The purpose of this paper was to examine the possibility of producing new blends of hydrogenated acrylonitrile-butadiene and chloroprene rubbers (HNBR/CR) unconventionally cross-linked with silver(I) oxide (AgO), and to investigate the physicomechanical properties of the obtained materials. From the obtained results, it can be concluded that HNBR/CR composites were effectively cured with AgO, which led to interelastomer reactions, and the degree of binding of HNBR with CR was in the range of 14-59%. The rheometric and equilibrium swelling studies revealed that the cross-linking progress depended on the weight proportion of both elastomers, and the degree of cross-linking was greater with more content of chloroprene rubber in the tested blends. Interelastomer reactions occurring between HNBR and CR improved the homogeneity and miscibility of the tested compositions, which was confirmed by differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) analyses. The tensile strength and hardness of the obtained HNBR/CR/AgO vulcanizates proportionally increased with the content of CR, while the tear strength showed an inverse relationship. The obtained new, unconventional materials were characterized by significant resistance to thermo-oxidative factors, which was confirmed by the high aging factor.

摘要

本文的目的是研究用氧化银（AgO）对氢化丙烯腈-丁二烯橡胶和氯丁橡胶（HNBR/CR）进行非常规交联以制备新型共混物的可能性，并研究所得材料的物理机械性能。从所得结果可以得出结论，HNBR/CR复合材料用AgO有效硫化，这导致了弹性体间反应，并且HNBR与CR的结合程度在14%-59%范围内。流变学和平衡溶胀研究表明，交联进程取决于两种弹性体的重量比例，并且在所测试的共混物中，氯丁橡胶含量越高，交联程度越大。HNBR和CR之间发生的弹性体间反应改善了所测试组合物的均匀性和混溶性，这通过差示扫描量热法（DSC）和扫描电子显微镜（SEM）分析得到证实。所得HNBR/CR/AgO硫化胶的拉伸强度和硬度随CR含量成比例增加，而撕裂强度呈现相反关系。所得新型非常规材料具有显著的抗热氧化因素性能，这通过高老化系数得到证实。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2562/10342298/5c54df54c505/materials-16-04573-g007.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2562/10342298/0af78bb020f7/materials-16-04573-sch006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2562/10342298/c0bd48f29aca/materials-16-04573-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2562/10342298/6efb9b035c46/materials-16-04573-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2562/10342298/5c54df54c505/materials-16-04573-g007.jpg

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