Preparation and Characterization of Universal Cold-Resistant Reactive Chlorinated Acrylic Rubber and Study of Its Vulcanization Characteristics

Abstract

Ethyl acrylate and butyl acrylate were used as monomers, vinyl monochloride acetate was used as the crosslinker in vulcanization reactions and sodium dodecyl sulfate was used as the emulsifier to prepare a general-purpose acrylic rubber. The synthetic products were characterized by infrared spectroscopy, nuclear magnetic resonance spectroscopy, gel permeation chromatography, differential scanning calorimetry, and other methods. Then, the raw rubber, carbon black, vulcanizing agent, and so forth were mixed and then vulcanized, and the performance of the product was tested. The results showed that the synthesized acrylic rubber contained low levels of ash and volatile matter. The structure of the acrylic rubber was consistent with its design, and the glass transition temperature was –28.1°C. A study showed that the product vulcanized quickly. When the dosage of butyl acrylate was increased, the tensile strength decreased, and the elongation at break increased. The working temperature was reduced by adding plasticizer. With increasing plasticizer (RS-735) content, the elongation at break increased, and the tensile strength decreased. When the RS-735 level reached 10 phr, the brittleness temperature of the product decreased to –28°C. This product is resistant to oil and high temperatures, and it can be used widely in environments from –28 to 180°C.