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M. Paturej, M. El Fray

Syntheses of new poly(ester-carbonate-urethane)s based on trimethylene carbonate (TMC)

and polyester polyol derived from dimerized fatty acid (in English)

Polimery 2009, No 9, 611


DOI: dx.doi.org/10.14314/polimery.2009.611

Summary

A series of poly(ester-carbonate-urethane)s containing different weight ratios of respective fragments were synthesized by coupling of dihydroxyl compounds with diisocyanates. First, poly(trimethylene carbonate) diol (PTMCD) was prepared via ring opening polymerization of trimethylene carbonate (TMC) using 1,4-butanediol as an initiator and stannous 2-ethylhexanoate as a catalyst. PTMCD was further reacted in the melt with polyester polyol (dimer diol derived from dimerized fatty acid, DD) in the presence of hexamethylene diisocyanate (HDI) as a coupling agent. The structure and physical properties of PTMCD and final copolymer were characterized by ATR FT-IR and DSC measurements. Thermal analysis indicated that temperature transitions were dependent on the copolymer composition. The hydrolytic degradation (pH=9.0) profiles of selected copolymers were also dependent on the polymer composition: higher weight loss was observed for polymers containing higher amount of carbonate units. At high concentration of DD (70 wt. %) the polymers showing high elasticity (330%) were produced.


Key words: copoly(ester-carbonate-urethane)s, poly(trimethylene carbonate), chemical structure, thermal properties


e-mail: mirfray@zut.edu.pl


M. Paturej, M. El Fray

Syntheses of new poly(ester-carbonate-urethane)s based on trimethylene carbonate (TMC) and polyester polyol derived from dimerized fatty acid (in English)