What are the types of plastolytics according to their mechanism of action?

27/01/2024
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(1) Acceptance-type plasticizer
Mainly phenylthiophenol, pentachlorothiophenol, etc., they are low-temperature plasticizer. In low-temperature plasticizing, can make the chain of rubber molecules free radical stabilization and the generation of shorter molecules. These compounds itself is a free radical acceptor, can be reacted with free radicals, so that free radicals produce chain suspension.
(2) Initiating plasticizer
Benzoyl peroxide, azodiisobutyric acid, etc. are high-temperature plasticizers. Its role is mainly to decompose the extremely unstable free radicals at high temperature, prompting the rubber to generate free radicals. The free radicals are generated in rubber molecules, which leads to the oxidization chain reaction process, resulting in the breakage of rubber molecular chain. Due to the presence of free radicals in the rubber, the rubber will According to the automatic oxidation chain reaction process further reaction, until the final decomposition of the relative molecular mass of small compounds.
(3)Mixed plasticizer
Mixed-type plastolytic agent is also called chain transfer-type plastolytic agent. There are mainly accelerator M, accelerator DM and 2,2-diphenylformamide diphenyl disulfide. This kind of plasticizer Not only can play the role of free radical receiver in low-temperature plasticizing, but also can decompose free radicals in high-temperature plasticizing, triggering the oxidation chain reaction of rubber molecules.