Lee, SH Kim, SH Han, YK Kim, YH 2024-01-21T12:33:31Z 2024-01-21T12:33:31Z 2021-09-05 2001-04-01 0887-624X https://pubs.kist.re.kr/handle/201004/140535 Three kinds of OH-terminated polylactides were synthesized by the ring opening polymerization of lactide, with an alcohol such as dodecanol, glycerol, or pentaerythritol, in the presence of stannous octoate. Moreover, Cl-, NH2-, and COOH-terminated polylactides were synthesized from OH-terminated polylactides. The end groups of the polylactides were identified by H-1 NMR and C-13 NMR. According to thermal analysis, the cold crystallization temperatures of Cl-, NH2-, and COOH-terminated polylactides were higher than those of OH-terminated polylactides. The thermal stability of OH-terminated polylactides was poor, whereas NH2- and Cl-terminated polylactides were more resistant to thermal degradation. In a hydrolysis degradation test, the mass and molecular weight loss of COOH-terminated polylactides were high, whereas those of Cl- and NH2-terminated polylactides were much lower. These end-group effects were increased with an increasing number of chain arms. (C) 2001 John Wiley & Sons, Inc. English JOHN WILEY & SONS INC IN-VITRO DEGRADATION STANNOUS OCTOATE POLYMERIZATION POLY(D,L-LACTIDE) HYDROLYSIS POLYMERS LACTIDE VIVO ACID Synthesis and degradation of end-group-functionalized polylactide Article 10.1002/1099-0518(20010401)39:7<973::AID-POLA1073>3.0.CO;2-8 1 JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.39, no.7, pp.973 - 985 JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 39 7 973 985 scie scopus 000167402000003 2-s2.0-0035312687 Polymer Science Polymer Science Article IN-VITRO DEGRADATION STANNOUS OCTOATE POLYMERIZATION POLY(D,L-LACTIDE) HYDROLYSIS POLYMERS LACTIDE VIVO ACID lactide polylactide functionalized polylactide end group degradation