Microwave-Assisted Synthesis of Star-Shaped Poly(ε-caprolactone)-block-poly(L-lactide) Copolymers and the Crystalline Morphologies

被引：8
|
作者：
Zhang, Zhonghai [1 ]
Ren, Jie [1 ,2 ]
Feng, Yue [1 ]
Li, Jianbo [1 ]
Yuan, Weizhong [1 ]
机构：
[1] Tongji Univ, Sch Mat Sci & Engn, Inst Nano & Biopolymer Mat, Shanghai 200092, Peoples R China
[2] Tongji Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Adv Civil Engn Mat, Shanghai 200092, Peoples R China
来源：
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2010年 / 48卷 / 22期
基金：
中国国家自然科学基金;
关键词：
biodegradable; block copolymers; crystallization; diblock copolymers; microwave; poly(epsilon-caprolactone); poly(L-lactide); ring-opening polymerization; star polymers; star-shaped copolymer; RING-OPENING POLYMERIZATION; ALT-GLYCOLIC ACID); POLY(L-LACTIDE)-B-POLY(ETHYLENE OXIDE) COPOLYMERS; STANNOUS OCTOATE CATALYST; EPSILON-CAPROLACTONE; BLOCK-COPOLYMERS; L-LACTIDE; SPHERULITIC GROWTH; DIFFERENT ARMS; MULTIFUNCTIONAL INITIATOR;
D O I：
10.1002/pola.24304
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A monomode microwave reactor was used for the synthesis of designed star-shaped polymers, which were based on dipentaerythritol with six crystallizable arms of poly(epsilon-caprolactone)-b-poly(L-lactide) (PCL-b-PLLA) copolymer via a two-step ring-opening polymerization (ROP). The effects of irradiation conditions on the molecular weight were studied. Microwave heating accelerated the ROP of CL and LLA, compared with the conventional heating method. The resultant hexa-armed polymers were fully characterized by means of FTIR, H-1 NMR spectrum, and GPC. The investigation of thermal properties and crystalline behaviors indicated that the crystalline behaviors of polymers were largely depended on the macromolecular architecture and the length of the block chains. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 5063-5071, 2010
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页码：5063 / 5071
页数：9
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