Effect of vinyltrimethoxy silane as a coupling agent on the mechanical and electrical properties of acrylic rubber

Abstract

w HEN there is a need for enhancing the adhesion between a polymeric material and the filler, silane coupling agents are the best choice. in order to enhance the adhesion between acrylic rubber (acm) and silica, vinyl trimethoxysilane (vtms) can be used for this purpose. acrylic rubber was prepared by emulsion polymerization. vtms was added during the polymerization process to copolymerize with acm. vtms was added in different per cent; 0, 0.25, 0.5, 1.0 and 2.0 %. the effect of adding different percentages of vtms on the mechanical, thermal and mechanical properties was monitored. mechanical properties were significantly improved due to silane incorporation to the acrylic rubber matrix. the thermal stability of acrylic rubber increased due to silane addition. electrical measurements revealed that the volume resistivity, dielectric strength and breakdown voltage were also increased.

Effect of poly (acrylamide-co-acrylic acid salt) on anti-aging properties and adhesion between acrylonitrile butadiene rubber and polyester fabric

“…The decrease in tensile strength may be attributed the decrease in crosslink density with increasing COS within the composite. The direct effect of crosslink density within a polymeric composite on its mechanical properties has been extensively discussed in previous literature, where mechanical properties such as tensile strength, elastic modulus, and hardness properties increase while elongation at break decreases with increasing crosslink density [32][33][34][35]. Similar results were obtained here, where tensile strength decreased as crosslink density of NBR composite decreased.…”

“…3C, the elastic modulus of COS 0 decreased as the aging time increased where the loss in elastic modulus of COS0 was 4.9, -9.0 and -14.6% after aging time of 1, 3 and 7 days. This could be attributed to the thermal degradation of polymer chains caused by thermal aging, which had a negative impact on crosslink density and thus on elastic modulus [33,35]. The retention in elastic modulus for NBR composites containing COS as anti-aging agent was higher than that of COS 0 composite.…”