摘要
本工作以DSC研究了聚d,l-乳酸/聚ε-己内酯(PLA/PCL)、聚d,l-乳酸-聚乙二醇嵌段共聚物/聚ε-己内酯-聚乙二醇嵌段共聚物(PELA/PECL)共混体系的相容性,发现PLA/PCL体系是不相容的,随PLA含量的增大,PCL结晶度增大。而PELA/PECL共混体系中,由于PEG链段的“内增容作用”,使二组分有较好的相容性。随PELA含量的增加,PECL的熔点、结晶度降低。
The miscibility of poly(d,1-lactide)/poly(ε-caprolactone)(PLA/PCL) and poly(d,1-lactide)-co-poly (ethylene glycol)/poly (ε-caprolactone)-co-poly (ethylene glycol) (PELA/PECL) blends was investigated by means of differential scanning calorimetry (DSC) study. It was found that the PLA/ PCL blends were immiscible, the increase in crystallinity of PCL with the increase in containing amount of PLA in the blends. And the PELA/PECL blends showed a certain extent miscible with PEG as an 'internal compatibilizer' to cause a relative depression of both Tm and crystallinity of PECL in the blends.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1993年第2期70-74,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金
关键词
高聚物
生物降解
相容性
共混体系
miscibility, polyblend, poly (d,1-lactide), poly (ε-caprolactone), poly (ethylene glycol) ,block copolymer, internal compatibilizer.
