Significantly Improving Strength and Damping Performance of Nitrile Rubber via Incorporating Sliding Graft Copolymer,Industrial & Engineering Chemistry Research

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Significantly Improving Strength and Damping Performance of Nitrile Rubber via Incorporating Sliding Graft Copolymer
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-12-03 , DOI: 10.1021/acs.iecr.8b03871
Junjun Wang ₁ , Xiuying Zhao ₁ , Wencai Wang ₁ , Xiaoyan Geng ₁ , Liqun Zhang ₁ , Baochun Guo ₂ , Toshio Nishi ₃ , Guo-Hua Hu ₄

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Aiming at high-strength damping elastomers, the pre-cross-linked sliding graft copolymer (SGC) is incorporated into a nitrile rubber (NBR). The microstructure characterizations reveal that SGC phase is dispersed in NBR matrix fairly uniformly with a distinct interphase. As SGC content increases, the loss factor of SGC/NBR blends gradually increases. The improved damping properties of SGC/NBR blends are attributed to the intrinsic high damping characteristics of SGC and the formed interfacial hydrogen bonds. In addition, the mechanical properties of SGC/NBR blends are unexpectedly improved. The tensile strength of SGC/NBR (20/100) is increased by 170%, comparing to that of neat NBR. The significantly increased tensile strength is ascribed to the increased orientation of NBR chains, because of the “pulley effect” of SGC and the successive rupture/reassociation of interfacial hydrogen bonds. The high damping and mechanical properties of SGC/NBR blends make them potential materials for use in isolation rubber bearings applications.

中文翻译：

通过掺入滑动接枝共聚物可显着提高丁腈橡胶的强度和阻尼性能

针对高强度阻尼弹性体，将预交联的滑动接枝共聚物（SGC）掺入丁腈橡胶（NBR）中。微观结构表征表明，SGC相相当均匀地分散在NBR基体中，并具有明显的相间相。随着SGC含量的增加，SGC / NBR共混物的损耗因子逐渐增加。SGC / NBR共混物阻尼性能的提高归因于SGC固有的高阻尼特性和形成的界面氢键。另外，SGC / NBR共混物的机械性能出乎意料地得到了改善。与纯NBR相比，SGC / NBR（20/100）的拉伸强度提高了170％。拉伸强度的显着提高归因于NBR链取向的增加，由于SGC的“皮带轮效应”以及界面氢键的连续断裂/重新结合。SGC / NBR共混物的高阻尼和机械性能使其成为用于隔离橡胶轴承应用的潜在材料。

更新日期：2018-12-03

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