English  |  正體中文  |  简体中文  |  Items with full text/Total items : 68069/68069 (100%)
Visitors : 23110763      Online Users : 298
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU 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://ir.lib.ncu.edu.tw/handle/987654321/49927

    Title: Characterization of Monodisperse Copolymer Submicrospheres with Branched Structures and Different Glass-Transition Temperatures Prepared by Soap-Free Emulsion Polymerization
    Authors: Liu,YY;Lo,MY;Chen,H
    Contributors: 化學工程與材料工程學系
    Date: 2011
    Issue Date: 2012-03-27 16:26:40 (UTC+8)
    Publisher: 國立中央大學
    Abstract: This study was focused on the synthesis of monodisperse poly(n-butyl methacrylate-co-methyl methacrylate) submicrospheres via soap-free emulsion polymerization and on their characterization. The glass-transition temperatures of poly(n-butyl methacrylate) and poly(methyl methacrylate) were approximately 25 and 110 degrees C, respectively. Therefore, submicrospheres with different glass-transition temperatures could be obtained through the variation of the copolymer composition. In addition, relationships between the monomer feed concentration (M(0)) and the Mark-Houwink constant (alpha) for the copolymer submicrospheres were proposed. The molecular weights of the copolymer submicrospheres decreased sharply with an increase in the weight fraction of n-butyl methacrylate. On the contrary, the particle diameter increased linearly from 277 to 335 nm with an increase in the weight fraction of n-butyl methacrylate. The a values decreased with an increase in M(0), and this indicated that the branched structures of the copolymer submicrospheres were easily obtained when M(0) was higher than 0.11 g/mL of water. Consequently, the results of this study are expected to provide useful information for the synthesis of monodisperse copolymer submicrospheres by soap-free emulsion polymerization. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 120: 2945-2953, 2011
    Appears in Collections:[化學工程與材料工程學系 ] 期刊論文

    Files in This Item:

    File Description SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明