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English to Hungarian translations [PRO] Tech/Engineering - Chemistry; Chem Sci/Eng
English term or phrase:chain endblocker
This polymerisation can be conducted in presence of hexamethyldisiloxane , which will act as a CHAIN ENDBLOCKER to give trimethylsilyloxy terminated polymers or in presence of divinyltetramethyldisiloxane to give vinyldimethylsilyloxy terminated polymers which will be used to prepare silicone elastomers.
The above polymers display a distribution of molecular weight around an average mass, depending on the amount of CHAIN ENDBLOCKER. Moreover, all these reactions are equilibrium reactions during which a certain quantity of oligomers, e.g. cyclics, is formed. The most volatiles will essentially be removed under vacuum at elevated temperatures. This explains why all silicones contain a certain amount of residual volatile oligomers.