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Synthesis and characterization of aliphatic poly(esteramide)s containing symmetrical bisamide blocks
Author(s) -
Stapert Henk R.,
Dijkstra Pieter J.,
Feijen Jan
Publication year - 1998
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19981300109
Subject(s) - polymer chemistry , adipate , copolymer , materials science , condensation polymer , polymer , recrystallization (geology) , triclinic crystal system , crystal structure , melting point , diamine , yield (engineering) , organic chemistry , chemistry , metallurgy , paleontology , composite material , biology
A series of symmetrical diols were synthesised through ring‐opening of lactones with different ring sizes by alkane diamines in moderate to good yields. Ring‐opening of the dilactones glycolide and lactide with a diamine in equimolar amounts afforded symmetrical diols in quantitative yield. Aliphatic poly(ester‐amide)s were prepared by polycondensation of N,N′‐bis(caproyl)butane diamide, dimethyl adipate and 1,4‐butanediol. The structure of the diamide was retained in the polymer. The polymers synthesized are semi‐crystalline materials that possess ordered structures in the solid phase over almost the entire copolymer range. Depending on thermal history and copolymer composition thermal analyses is in agreement with the presence of pseudo‐hexagonal crystal structures below 75°C, a fast melting recrystallization at this temperature and a triclinic structure at higher temperatures.