Preparation and characterization of PLLA/P(CL-b-LLA) blends by an in situ ring-opening polymerization
作者： Aihua He , Charles C. Han , Guisheng Yang
DOI: 10.1016/J.POLYMER.2004.08.076
关键词: Copolymer 、 Polymer blend 、 Polymer chemistry 、 Polymerization 、 In situ 、 Lactide 、 Ring-opening polymerization 、 Proton NMR 、 Solution polymerization 、 Materials science
摘要: Abstract This paper describes a new reactive blending approach to improve the compatibility of poly( l -lactide) (PLLA) and poly(ɛ-caprolacton) (PCL). For this purpose, ring-opening polymerization -lactide (LLA) was carried out in presence PCL-OH (OH groups on one end). The P(CL-b-LLA) block copolymers were situ formed during polymerization, as result, PLLA/P(CL-b-LLA) blends obtained. characterization GPC 1H NMR verified synthesis blends. Furthermore, 13C spectroscopy showed that no transesterification reaction occurred significant extent LLA process. compatibilizes phase separated structure PCL domains PLLA matrix. size matrix became much smaller than solution blended sample. average sizes are controllable level sub-micron scale.
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