KIM, SH HAN, YK AHN, KD KIM, YH CHANG, T 2024-01-21T22:13:07Z 2024-01-21T22:13:07Z 2021-08-31 1993-12 0025-116X https://pubs.kist.re.kr/handle/201004/145947 The ring-opening polymerization of L-lactide with stannous octoate was investigated in the presence of pentaerythritol. By this way it was possible to prepare higher molecular weight star-shaped poly(L-lactide)s compared with the linear ones obtained by stannous octoate only. The weight-average molecular weights of linear and star poly(L-lactide)s were measured by light scattering analysis from hexafluoro-2-propanol solution, and the respective Mark-Houwink equations were derived. The second virial coefficient and the intrinsic viscosity of the star polymers were lower than those of the linear ones, which confirms the star-shaped architecture. English HUTHIG & WEPF VERLAG PREPARATION OF STAR-SHAPED POLYLACTIDE WITH PENTAERYTHRITOL AND STANNOUS OCTOATE Article 10.1002/macp.1993.021941202 1 MAKROMOLEKULARE CHEMIE-MACROMOLECULAR CHEMISTRY AND PHYSICS, v.194, no.12, pp.3229 - 3236 MAKROMOLEKULARE CHEMIE-MACROMOLECULAR CHEMISTRY AND PHYSICS 194 12 3229 3236 N other A1993MK18300003 Polymer Science Polymer Science Article POLY(L-LACTIDE) COPOLYMERS POLYMERS POLYMERIZATION HOMOPOLYMERS KINETICS polylactide star-shpaed preparation