Ahn, BD Kim, SH Kim, YH Yang, JS 2024-01-21T11:14:42Z 2024-01-21T11:14:42Z 2021-09-05 2001-12-09 0021-8995 https://pubs.kist.re.kr/handle/201004/139917 Biodegradable homopolyesters such as poly(butylene succinate) (PBSU) and poly(butylene adipate) (PBAD) and copolyesters such as poly(butylene succinate-co-butylene adipate) (PBSA) were synthesized, respectively, from succinic acid (SA) and adipic acid (AA) with 1,4-butanediol through a two-step process of esterification and deglycolization. The polyester compositions and physical properties of both homopolyesters and copolyesters were investigated by H-1- and C-13-NMR, DSC, GPC, WAY-D, and optical polarizing microscopy. The melting point (T-m) of these copolyesters decreased gradually as the contents of butylene adipate increased and the glass-transition temperature (T-g) of these copolyesters decreased linearly as the contents of the adipoyl unit increased. PBSA copolyesters showed two types of XRD patterns of PBSU and PBAD homopolyesters. Furthermore, the biodegradation and hydrolytic degradation of the high molecular weight PBSU homopolyester, PBAD homopolyester, and PBSA copolyesters were investigated in the composting soil and NH4Cl aqueous solutions at a pH level of 10.6. (C) 2001 John Wiley & Sons, Inc. English JOHN WILEY & SONS INC MULTIPLE MELTING ENDOTHERMS ALIPHATIC POLYESTERS STANNOUS OCTOATE MORPHOLOGY POLYMERS COPOLYESTERS DEGRADATION POLYESTERIFICATION TEREPHTHALATE POLYETHYLENE Synthesis and characterization of the biodegradable copolymers from succinic acid and adipic acid with 1,4-butanediol Article 1 JOURNAL OF APPLIED POLYMER SCIENCE, v.82, no.11, pp.2808 - 2826 JOURNAL OF APPLIED POLYMER SCIENCE 82 11 2808 2826 scie scopus 000171616000024 2-s2.0-0035834840 Polymer Science Polymer Science Article MULTIPLE MELTING ENDOTHERMS ALIPHATIC POLYESTERS STANNOUS OCTOATE MORPHOLOGY POLYMERS COPOLYESTERS DEGRADATION POLYESTERIFICATION TEREPHTHALATE POLYETHYLENE biodegradable aliphatic polyester poly(butylene succinate-co-butylene adipate) gel permeation chromatography differential scanning calorimetry crystallinity biodegradation