Hiroaki Tetsuka, Y. Doi, H. Abe
Mar 17, 2006
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0
Influential Citations
27
Citations
Journal
Macromolecules
Abstract
Novel aliphatic poly(ester−amide)s with a periodic sequential structure consisting of ester and amide groups were synthesized by two-step polycondensation reactions using adipate, butane-1,4-diamine, and linear diols with different chain lengths, ranging from 3 to 6 methylene groups. Effects of the monomeric structure and sequential length of ester units on the thermal properties and crystalline structure of the obtained periodic copolymers were determined by means of differential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD). On the basis of DSC measurements, the melting temperatures of the periodic copolymers were higher than those of homopolyesters consisting of the same ester units and tended to increase with an increase in amide content. The copolymers from adipate, butane-1,4-diol, and butane-1,4-diamine had especially high thermal stability compared with the poly(tetramethylene adipate) homopolyester, and the melting temperatures detected were above 200 °C. The X-ray diffractio...