Effects of Thermal and Humidity Aging on the Interfacial Adhesion of Polyketone Fiber Reinforced Natural Rubber Composites

Abstract

Polyketone fiber is considered as a reinforcement of the mechanical rubber goods (MRG) such as tires, automobile hoses, and belts because of its high strength and modulus. In order to apply it to those purposes, the high adhesion of fiber/rubber interface and good sustainability to aging conditions are very important. In this study, polyketone fiber reinforced natural rubber composites were prepared and they were subjected to thermal and humidity aging, to assess the changes of the interfacial adhesion and material properties. Also, the effect of adhesive primer treatment, based on the resorcinol formaldehyde resin and latex (RFL), of polyketone fiber for high interfacial adhesion was evaluated. Morphological and property changes of the rubber composites were analyzed by using various instrumental analyses. As a result, the rubber composite was aged largely by thermal aging at high temperature rather than humidity aging condition. Interfacial adhesion of the polyketone/NR composites was improved by the primer treatment and its effect was maintained in aging conditions.

Effect of a Natural Processing Aid on the Properties of Acrylonitrile-Butadiene Rubber: Study on Soybean Oil Fatty Acid from Seed Crop

“…This behavior was caused by both the level of crosslink formation and the main chain scissions at high temperatures, which then caused a reduced elongation of the polymer. The degradation action of rubber molecules by oxygen, especially in the butadiene segment, is activated by thermal aging [ 33 ]. Thermo-oxidative aging was also characterized by an aging coefficient ( A f ), as shown in Table 7 .…”

Electron Beam Irradiation: A Method for Degradation of Composites Based on Natural Rubber and Plasticized Starch

“…All of these are very well correlated with the results obtained in mechanical tests (hardness increasing, tensile strength, and elongation decreasing with the irradiation dose increasing over 150 kGy). With the irradiation dose increasing, the surfaces of both C10 and C50 samples present cracks and micro pores [70,73]. This result suggests the decreasing of the adhesion at the interface as the irradiation dose increases, which leads to material degradation.…”

Water Absorption Kinetics in Composites Degraded by the Radiation Technique

“…After irradiation, C10 and C50 samples showed visible surface changes due to the aging induced by oxidative degradation. As the irradiation dose increased on both C10 and C50 surfaces, some cracks and micro voids could be observed [ 55 , 58 ]. These suggest, on the one hand, a decreasing of the adherence at the interface between the elastomeric matrix and filler, and on the other hand, scissions of cross-linking and grafting bonds [ 59 ].…”