Thermal and Dielectric Properties of Biodegradable Poly(Butylene Sebacate-CO-Butylene Dilinoleate)

摘要

A new biodegradable copolymers: poly(butylene sebacate-co-butylene dilinoleate) modified by different (0 - 10 wt.%) content of buthylene terephtalate were synthesized and their thermal and dielectric properties were investigated in a wide temperature range. There was find that melting temperature T_m decreases from 338 to 316K and glass temperature increases from 206.5 to 216.5K with the increase of the buthylene terephtalate content. Two dielectric relaxations: α at about 250K and β near 200K were observed in dielectric spectra; also melting process is explicitly seen there in a form of rapid increasing of dielectric constant value. Good coincidence between values of melting temperatures estimated by DSC and dielectric measurements was observed. A reason of such a behaviour is disscused with respect to degree of crystallinity changes caused by buthylene terephtalate presence in the copolymer.