Study on crystalline morphology of poly( l-lactide)-poly(ethylene glycol) diblock copolymer

Crystallization behavior, structural development and morphology evolution in a series of diblock copolymers of poly( l-lactide)- block-poly(ethylene glycol) (PLLA- b-PEG) were investigated via differential scanning calorimetry, wide-angle X-ray diffraction, polarized optical microscopy and atomic fo...

Full description

Saved in:
Bibliographic Details
Published in:Polymer (Guilford) 2004-08, Vol.45 (17), p.5969-5977
Main Authors: Sun, Jingru, Hong, Zhongkui, Yang, Lixin, Tang, Zhaohui, Chen, Xuesi, Jing, Xiabin
Format: Article
Language:English
Subjects:
Applied sciences
Crystalline morphology
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Poly( l-lactide)
Poly(ethylene glycol)
Properties and characterization
Structure, morphology and analysis
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Crystallization behavior, structural development and morphology evolution in a series of diblock copolymers of poly( l-lactide)- block-poly(ethylene glycol) (PLLA- b-PEG) were investigated via differential scanning calorimetry, wide-angle X-ray diffraction, polarized optical microscopy and atomic force microscopy. In these copolymers, both blocks are crystallizable and biocompatible. It was interesting that these PLLA- b-PEG diblock copolymers could form spherulites with banded textures, which was undercooling dependent. Single crystals with an abundance of screw dislocations were also observed via AFM. Such results indicated that these ringed spherulites and single crystals were formed during the crystallization of the PLLA blocks.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2004.06.026