PREPARATION OF STAR-SHAPED POLYLACTIDE WITH PENTAERYTHRITOL AND STANNOUS OCTOATE

被引：0
|
作者：
KIM, SH [1 ]
HAN, YK [1 ]
AHN, KD [1 ]
KIM, YH [1 ]
CHANG, T [1 ]
机构：
[1] KOREA ADV INST SCI & TECHNOL,POLYMER CHEM LAB,POB 131,SEOUL 131,SOUTH KOREA
来源：
MAKROMOLEKULARE CHEMIE-MACROMOLECULAR CHEMISTRY AND PHYSICS | 1993年 / 194卷 / 12期
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D O I：
暂无
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
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.
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页码：3229 / 3236
页数：8
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