Practical Development in Direct Adhesion Rubbers and Nickel Plated Metalsduring Curing

本文提出的金属与橡胶直接粘接技术，利用镀镍金属和含三嗪硫醇的橡胶化合物生产不粘接的橡胶-金属粘接材料，具有实际和理论价值。本研究的目的是阐明镀镍表面成分和固化体系对橡胶与金属之间粘附力的影响，以及固化过程中橡胶与金属之间的直接粘附机理。1)镀镍金属在空气暴露时氧化层厚度增加，超过20*厚，在常规固化条件下不与橡胶化合物粘附。在这种情况下，电镀表面被不产生橡胶分子与镍表面或镍反应产物之间界面键的氢氧化镍覆盖，变为无粘结表面。2)在硫化过程中加入三嗪硫醇，将NR、CR、NBR、HS-NBR、EPDM、FR、AR等常规化合物粘附在镀镍金属上。通过控制三嗪硫醇和关键促进剂的配比，可获得较好的粘结性和性能。在过氧化物固化体系中，三嗪类硫醇存在时，得到了良好的平衡。3)硫化过程中橡胶化合物与镀镍金属之间的直接粘附解释如下：在这种粘附中，橡胶化合物和镀镍金属之间的化学势的差异是在两者接触时形成的。化学势的差异导致镍离子与三嗪硫醇或梯度发生反应；镍离子从镀镍中扩散出来。这些反应导致了硫化剂与镀镍之间的界面键和增强层的形成；通过界面分析确定了键和层。这两种形成对于橡胶化合物和镀镍金属之间的直接粘附是必不可少的。4)在本研究中，制作了许多试验产品。其中一些将由爱荷华州的小公司进行工业化生产。少

The presented direct adhesion technique between metals and rubbers is practically and theoretically worth producing rubber-metal adherends without adhesive by using nickel-plated metals and rubber compounds with triazine thiols. The purpose of this study is to elucidate the effect of surface compositions of nickel plating and curing system on adhesion, and contract direct adhesion mechanism between rubbers and metals during curing.1) Nickel plated metals increased the thickness of oxide layrs in air exposure and over 20* thick, did not adhere with rubber compounds under conventional curing conditions. In these cases, the plating surface was covered with nickel hydroxide which does not produce interfacial bonds between rubber molecules and nickel surface or nickel reaction products, and changed to non-adhesive surface.2) Conventional compounds such as NR,CR,NBR,HS-NBR,EPDM,FR,AR adhered to nickel plated metals by the addition of triazine thiols during curing. The good adhesion and prope … More rties of vulcanizates was obtained by controling the ratio of triazine thiols and key accerelators. In the peroxide curing system, good balance was obtained in the presence of triazine thiols.3) Direct adhesion between rubber compounds and nickel plated metals during curing is explained as follows. In this adhesion, the difference of chemical potential between rubber compounds and nickel plated metals is formed when both come to contact. The difference of chemical potential brings about the reactions of nickel ions with triazine thiols or gradients ; nickel ions come to diffuse from nickel plating. The reactions lead to the formation of interfacial bonds and reinforcement layr at interface between vulcanizates and nickel plating ; the bonds and layr was determined from interfacial analysis. Both formation is essential for direct adhesion between rubber compounds and nickel plated metals.4) In this study, many trial products were made. Some of them will be produced industrially by small company in lwate prefecture. Less