通过氧化锌-氨基酸网络形成的羧化丙烯腈-丁二烯橡胶交联的新途径,Journal of Applied Polymer Science

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通过氧化锌-氨基酸网络形成的羧化丙烯腈-丁二烯橡胶交联的新途径
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-10-02 , DOI: 10.1002/app.49996
Mithun Das ₁ , Sanjay Pal ₁ , Kinsuk Naskar ₁

Affiliation

在此，我们提出一种策略，该策略可导致基于羧化丙烯腈-丁二烯橡胶（XNBR）的高性能弹性体材料的形成。已经为XNBR设计了独特的交联路线，该路线不涉及典型的交联剂，例如硫。在这项研究中，已经研究了两性离子化合物作为离子型弹性体的二次交联剂的显示原因。天然存在的赖氨酸（Ly）和色氨酸（Trp）氨基酸是两性离子化合物，已在此处进行了研究。该方法导致形成交联的离子弹性体，该弹性体具有由氧化锌（ZnO）和氨基酸形成的双离子网络结构。与传统的交联体系相比，通过ZnO和不同氨基酸化合物交联的XNBR表现出优异的物理性能。傅立叶变换红外光谱，透射电子显微镜和溶胀研究分析证实了交联过程后XNBR中存在羧酸锌和两性离子网络。动态力学分析，差示扫描量热法和振动盘流变仪分析表明，双交联XNBR中存在各种热弛豫和跃迁。ZnO和氨基酸交联的XNBR橡胶具有2.5 phr的Ly和5 phr的Trp的最高抗张强度分别为42.4和39.7 MPa，这大大高于先前报道的离子交联弹性体的值。透射电子显微镜和溶胀研究分析证实了交联过程后XNBR中存在羧酸锌和两性离子网络。动态力学分析，差示扫描量热法和振动盘流变仪分析表明，双交联XNBR中存在各种热弛豫和转变。ZnO和氨基酸交联的XNBR橡胶具有2.5 phr的Ly和5 phr的Trp的最高抗张强度分别为42.4和39.7 MPa，这大大高于先前报道的离子交联弹性体的值。透射电子显微镜和溶胀研究分析证实了交联过程后XNBR中存在羧酸锌和两性离子网络。动态力学分析，差示扫描量热法和振动盘流变仪分析表明，双交联XNBR中存在各种热弛豫和跃迁。ZnO和氨基酸交联的XNBR橡胶具有2.5 phr的Ly和5 phr的Trp的最高抗张强度分别为42.4和39.7 MPa，这大大高于先前报道的离子交联弹性体的值。振动盘流变仪分析和振动分析表明双交联XNBR中存在各种热弛豫和转变。ZnO和氨基酸交联的XNBR橡胶具有2.5 phr的Ly和5 phr的Trp的最高抗张强度分别为42.4和39.7 MPa，这大大高于先前报道的离子交联弹性体的值。振荡圆盘流变仪分析表明双交联XNBR中存在各种热弛豫和转变。ZnO和氨基酸交联的XNBR橡胶具有2.5 phr的Ly和5 phr的Trp的最高抗张强度分别为42.4和39.7 MPa，这大大高于先前报道的离子交联弹性体的值。

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A new route of cross‐linking of carboxylated acrylonitrile‐butadiene rubber via zinc oxide‐amino acid network formation

Herein, we present a strategy that leads to the formation of a high‐performance elastomeric material based on the carboxylated acrylonitrile‐butadiene rubber (XNBR). A unique cross‐linking route for XNBR has been designed, which does not involve typical cross‐linking agents such as sulfur. In this study, the show cause‐effect of zwitterionic compounds as the secondary cross‐linking agent for ionic elastomer has been investigated. Naturally occurring lysine (Ly) and tryptophan (Trp) amino acid are the zwitterionic compounds, which have been explored here. This approach results in the formation of a cross‐linked ionic elastomer that houses a dual ionic network structure formed by zinc oxide (ZnO) and amino acid. XNBR cross‐linked by ZnO and different amino acid compounds exhibit superior physical properties as compared to the conventional cross‐linking system. Fourier transform infrared spectroscopy, transmission electron microscope, and swelling study analyzes confirm the existence of zinc‐carboxylate and zwitterionic network in XNBR after the cross‐linking process. The dynamic mechanical analysis, differential scanning calorimetry, and oscillating disk rheometer analyzes show various thermal relaxations and transitions present in the dual cross‐linked XNBR. The ZnO and amino acid cross‐linked XNBR rubber with 2.5 phr of Ly and 5 phr of Trp show the highest tensile strength of 42.4 and 39.7 MPa, respectively, which is mostly higher than the previously reported values for ionic cross‐linked elastomers.

更新日期：2020-12-10

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