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Original: Terminator Polymerizer Molecular Weight Regulator Chain Transfer Agent Nucleating Agent Formulation Analysis
Polymer products production has a process is polymerization process, but plastics are difficult to polymerize themselves, need to add certain additives or additives to polymerize, such substances can be collectively referred to as polymerizers, such as molecular weight regulators, chain transfer agents and nucleating agents; The opposite effect is called a polymerizer, such as a terminator and a polymerizer
First, a brief description of polymerization inhibitors
Polymer inhibitor is an industrial additive used to prevent the polymerization reaction of compounds, the polymer inhibitor molecules react with chain free radicals to form non-free radicals or lowly reactive radicals that cannot be triggered, thereby terminating the polymerization, the polymerization inhibitor can prevent the polymerization, there will be an induction period in the polymerization process, the length of the conduction period is proportional to the content of the polymerization inhibitor, and after the polymerization inhibitor is consumed, the induction period is over
Second, the terminator overview
Terminator is a reagent used in the polymer chemical chain polymerization process, it can terminate the polymerization reaction, and continue in the chain polymerization reaction These substances can react with free radicals and proliferative radicals, making them inactive, thereby terminating the chain growth, stopping the polymerization reaction that continues, and obtaining polymer products
Third, the screening of terminators
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Fourth, the terminator polymerizer molecular weight regulator chain transfer agent nucleant formula analysis
Nucleating agent is to change the crystallization behavior of the resin, accelerate the crystallization speed, improve the crystallization density, promote refinement to shorten the molding cycle, improve the transparency, gloss, tensile strength, tensile strength, rigidity, impact resistance, creep resistance, etc.
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