淡江大學機構典藏:Item 987654321/50505
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 55956/90025 (62%)
Visitors : 11521196      Online Users : 84
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/50505


    Title: The effect of ionic interaction on the miscibility and crystallization behaviors of poly(ethylene glycol)/poly(L-lactic acid) blends
    Authors: 賴偉淇;Lai, Wei-chi;Liau, Wen-bin;Yang, Ling-yueh
    Contributors: 淡江大學化學工程與材料工程學系
    Keywords: blends;miscibility;crystallization
    Date: 2008-12-01
    Issue Date: 2010-08-09 18:23:58 (UTC+8)
    Publisher: Wiley-Blackwell
    Abstract: The effect of end groups (2NH2) of poly(ethylene glycol) (PEG) on the miscibility and crystallization behaviors of binary crystalline blends of PEG/poly(L-lactic acid) (PLLA) were investigated. The results of conductivity meter and dielectric analyzer (DEA) implied the existence of ions, which could be explained by the amine groups of PEG gaining the protons from the carboxylic acid groups of PLLA. The miscibility of PEG(2NH2)/PLLA blends was the best because of the ionic interaction as compared with PEG(2OH, 1OH-1CH3, and 2CH3)/PLLA blends. Since the ionic interaction formed only at the chain ends of PEG(2NH2) and PLLA, unlike hydrogen bonds forming at various sites along the chains in the other PEG/PLLA blend systems, the folding of PLLA blended with PEG(2NH2) was affected in a different manner. Thus the fold surface free energy played an important role on the crystallization rate of PLLA for the PEG(2NH2)/PLLA blend system. PLLA had the least fold surface free energy and the fast crystallization rate in the PEG(2NH2)/PLLA blend system, among all the PEG/PLLA systems studied.
    Relation: Journal of Applied Polymer Science 110(6), pp.3616-3623
    DOI: 10.1002/app.28878
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

    Files in This Item:

    File SizeFormat
    0021-8995_110(6)p3616-3623.pdf129KbAdobe PDF243View/Open

    All items in 機構典藏 are protected by copyright, with all rights reserved.


    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback