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Characterization and biodegradability of poly(butylene adipate‐ co ‐succinate)/poly(butylene terephthalate) copolyester
Author(s) -
Jung Kang Hye,
Soon Park Sang
Publication year - 1999
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19990425)72:4<593::aid-app16>3.0.co;2-i
Subject(s) - copolyester , materials science , adipate , differential scanning calorimetry , polymer chemistry , polybutylene succinate , copolymer , chemical engineering , biodegradation , polyester , polymer , composite material , organic chemistry , chemistry , thermodynamics , engineering , physics
Characterization of poly(butylene adipate‐co ‐succinate) (PBAS)/poly(butylene terephthalate) (PBT) copolyesters resulting from the intermolecular ester‐exchange reaction between molten PBAS and PBT have been analyzed using 1 H‐NMR spectroscopy, differential scanning calorimetry, wide‐angle X‐ray diffraction, and total organic carbon lab analyzer. Using the assignment of proton resonance due to homogeneous and heterogeneous dyads, the average block lengths were investigated over the entire range of copolymer composition. A decrease in melting temperature was observed with the increase of a terephthalate unit in the composition. The result of X‐ray diffraction curve matches well with that of average block length and thermal property. When a rich component is crystallized, the poor component is excluded completely in a crystal formation. The biodegradability in copolyesters also depended on the terephthalate unit in the composition and average block length of the aromatic unit. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 72: 593–608, 1999