Morphology Development in Relation to the Ternary Phase Diagram of Biodegradable PDLLA/PCL/PEO Blends

被引：14

作者：

Buddhiranon, Sasiwimon ^{[1
]}

Kim, Namil ^{[1
]}

Kyu, Thein ^{[1
]}

机构：

[1] Univ Akron, Dept Polymer Engn, Akron, OH 44325 USA

来源：

MACROMOLECULAR CHEMISTRY AND PHYSICS | 2011年 / 212卷 / 13期

关键词：

biodegradable polymer blends; miscibility; phase diagrams; poly(epsilon-caprolactone); poly(D; L-lactic acid); POLY(ETHYLENE OXIDE) BLENDS; POLYMER BLENDS; PHYSICAL-PROPERTIES; SINGLE-CRYSTALS; POLY(EPSILON-CAPROLACTONE); COMPATIBILIZATION; POLYESTERS; GROWTH;

D O I：

10.1002/macp.201100042

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理];

摘要：

The morphology phase diagram of biodegradable polymer blends of PDLLA, PCL, and PEO is presented and discussed. The phase diagram of PCL/high-molecular-weight PDLLA mixtures reveals an hour-glass phase diagram. Upon lowering the molecular weight of PDLLA, a combined LCST/UCST develops that is intersected by the melting transition curve of PCL. The observed liquid/liquid phase separation and crystal/isotropic phase transition are compared with the theoretical liquidus/solidus curves obtained by solving the combined Flory-Huggins and phase-field free energies self-consistently. A similar study is extended to the binary phase diagrams of PEO/PDLLA and PCL/PEO. Of particular interest is that the prism-type phase diagram of the ternary blends provides a complete description of the overall phase behavior.

引用

页码：1379 / 1391

页数：13

共 22 条

[1]

CRYSTALLIZATION BEHAVIOR OF POLY(ETHYLENE OXIDE) FROM POLY(3-HYDROXYBUTYRATE) POLY(ETHYLENE OXIDE) BLENDS - PHASE STRUCTURING, MORPHOLOGY AND THERMAL-BEHAVIOR [J].