Paper Title:
Synthesis and Characterizations of PLLA/PEG Block Copolymers
  Abstract

Poly(lactic acid-co-ethylene glycol) (PLLA/PEG) copolymers were synthesized and their properties were characterized. The PLLA/PEG/PLLA triblock copolymers were synthesized by ring-opening polymerization from l-lactide (LLA) and PEG macroinitiator. Stannous octoate, Sn(Oct)2 was used as a catalyst. Effects of molecular weight of PEG (600, 2000 and 4000), LLA/OH molar ratios (95:5, 98:2) and a sequence of addition of the reactants on properties of the copolymers were investigated. The triblock copolymers were subsequently used in a production of multiblock copolymers by reacting with a chain-extending agent, hexamethylene diisocyanate (HMDI). Chemical structure and molecular weight of the copolymers were characterized by 1H-NMR, FTIR and GPC. The results showed that molecular weight of triblock copolymers varied from 4,500 to 10,200. After chain extension, multiblock copolymer with molecular weight of 16,490 was produced. Thermal properties of the copolymers were also examined by DSC.

  Info
Periodical
Advanced Materials Research (Volumes 93-94)
Edited by
S. Suttiruengwong and W. Sricharussin
Pages
198-201
DOI
10.4028/www.scientific.net/AMR.93-94.198
Citation
T. H. Nguyen, A. Petchsuk, P. Tangboriboonrat, M. Opaprakasit, A. Sharp, P. Opaprakasit, "Synthesis and Characterizations of PLLA/PEG Block Copolymers", Advanced Materials Research, Vols. 93-94, pp. 198-201, 2010
Online since
January 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Shu Xian Shi, Yu Zheng Xia, Xiao Yan Ma, Shu Ke Jiao, Xiao Yu Li
Abstract:The triblock ABA copolymers of poly (D,L-lactide)-b-poly (ethylene glycol)-b-poly (D,L-lactide) (PDLLA-PEG-PDLLA) were synthesized by bulk...
469
Authors: Qing Hong Liang, Dong Mei Yue, Xiao Yu Li
Abstract:Amphiphilic diblock copolymer was synthesized in one-step or two-step process by using of methoxy polyethylene glycol (MePEG),...
643
Authors: Yu Jiang Fan, Jie Liang, Guo Ping Chen, Tetsuya Tateishi, Zhong Wei Gu, Xing Dong Zhang
Abstract:Linear and Star-shaped PCL-b-PEG copolymers were synthesized through a two step process, including the first step to synthesize the...
725
Authors: Wei Xing Chen, Su Yan Zhang, Ai Jie Ma, Qi Guan Wang
Biomaterials
Abstract:Thiophene derivative polymer is an important kind of conductive polymers. They often have good electrochemical activity, environment...
1846
Authors: Jun Chang, Cheng Wu Li, Gang Li
Chapter 1: Polymer Composites and Applied Materials
Abstract:Using chloroacetic acid(CA) and polyethylene glycol(PEG) as raw material, polyacetic acid-polyethylene glycol-polyacetic acid(PCA-PEG-PCA)...
95