ABSTRACT

The objective of this study is to improve the adhesion between SMC and EPDM Rubber without the application of a solvent-based adhesive. The influence of the addition of different percentages of phenolic resin, as an adhesion promoter, in the SMC, has been studied. The SMC was prepared in a conventional continuous SMC machine. The EPDM rubber was over-injected on the SMC part, and then vulcanized. The chemical bonding between both materials was produced during the rubber vulcanization step. The SMC-EPDM bond quality was characterized in different ways: 1) mechanically, determining the adhesion strength, 2) optically, comparing the surfaces of the SMC and the rubber after separating them, and 3) chemically, analyzing by DSC the heat of reaction of mixtures of rubber with the different resins used. It has been concluded 1) that SMC-EPDM adhesion is achieved with polyester resins but not with vinyl ester resins, 2) that the addition of phenolic resin promotes the chemical adhesion between SMC and EPDM rubber and 3) that the chemical bonding between both materials occurs because of the double bonds of residual maleic units of the polyester, which are more abundant when phenolic resin is added.

摘要

本研究的目的是在不使用溶剂型粘合剂的情况下提高 SMC 和 EPDM 橡胶之间的粘合力。研究了在 SMC 中添加不同百分比的酚醛树脂作为粘合促进剂的影响。SMC 在传统的连续 SMC 机器中制备。将三元乙丙橡胶过度注射到SMC零件上，然后进行硫化。两种材料之间的化学键是在橡胶硫化步骤中产生的。SMC-EPDM 粘合质量以不同方式表征：1) 机械上，确定粘合强度，2) 光学上，比较 ​​SMC 和橡胶分离后的表面，3) 化学上，通过 DSC 分析反应热橡胶与不同树脂的混合物。