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M. Cypryk, B. Delczyk

New gradient siloxane copolymers (in English)

Polimery 2006, No 7-8, 499



Summary

Anionic ring opening polymerisation of cyclotrisiloxanes allows to synthesise well-defined polysiloxanes. Experimental evidence for the selectivity of polymerisation and for the possibility of controlling the structure and functional group distribution in polysiloxanes obtaining by this method is provided. Siloxane copolymers of controlled gradient distribution of units along the chain may be obtained in this way. Kinetic studies of copolymerisation in combination with computer simulation make possible designing a copolymer structure. Thermal and dynamic mechanical studies confirm that properties of gradient copolysiloxanes are different from those of block copolymers of the same molecular weight and cumulative composition.


Key words: cyclotrisiloxanes, anionic ring opening polymerization, kinetics, gradient copolysiloxanes


e-mail: mcypryk@cbmm.lodz.pl


M. Cypryk, B. Delczyk

New gradient siloxane copolymers (in English)