English  |  正體中文  |  简体中文  |  Items with full text/Total items : 75533/75533 (100%)
Visitors : 27438661      Online Users : 361
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/987654321/3729

    Title: 導電高分子與聚胺基甲酸酯複合材料之研究;Chracterization of conductive polymer and polyurethane composite
    Authors: 盧藝;Yi Lu
    Contributors: 化學工程與材料工程研究所
    Keywords: 聚苯胺;聚胺基甲酸酯;導電高分子;殼核複合材料;polypyrrole;polyaniline;core-shell;conductive polymer;pu
    Date: 2002-06-21
    Issue Date: 2009-09-21 12:21:10 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 本研究主要是利用聚胺基甲酸酯摻混導電高分子聚苯胺及聚吡咯來增加導電高分子之加工性。在此我們使用4,4’-diphenylmethane diisocyanate (MDI)及poly(oxytetramethylene)glycol (PTMO)製備預聚物(prepolymer),再用N-methyldiethanolamine以及2,2-bis(hydroxymethyl)propionic acid為偶合劑,分別形成正電及負電的離子型聚胺基甲酸酯,然後利用丙酮製程(acetone process)將離子型聚胺基甲酸酯形成帶正電及負電的兩種粒子。利用光散射儀測量出負電及正電之聚胺基甲酸酯粒子的粒徑分別為231.9± 8.5nm及108.3± 3.8nm,界面電位分別為-41.5±4.3mV及61.5±5.2mV,絕對值皆大於30mV,由此可知我們經由acetone process所形成的正、負電型的聚胺基甲酸酯粒子是非常穩定的。 實驗主要分成兩個系統。第一個系統是利用負電型聚胺基甲酸酯直接摻混聚苯乙烯磺酸/聚苯胺錯化物,實驗結果發現當聚苯乙烯磺酸/聚苯胺錯化物的含量達25 %時可達到聚苯乙烯磺酸/聚苯胺錯化物的導電度,且成功提升了原本質硬、脆之聚苯胺的加工性。 第二個系統是將正電型聚胺基甲酸酯和導電高分子聚吡咯/形成一聚吡咯/正電型聚胺基甲酸酯之殼/核乳膠,實驗結果顯示出導電度隨著聚吡咯的含量而提高,由原本聚胺基甲酸酯的1.75 × 10-9 S/cm,提高到母液中吡咯含量為3%時聚合之複合材料的7.69 × 10-7 S/cm ,也使原本性質硬、脆的聚吡咯,其加工性質有效的改善。然而當母液中吡咯含量大於3%時,聚合的殼/核乳膠懸浮液並不穩定。 The purpose of this study is to form polyblends and core-shell structure of soft polyurethane and conducting polymer in order to improve the processibility of conducting polymer. The prepolymer of polyurethane was prepared by 4,4’-diphenylmethane diisocyanate(MDI) and poly(oxytetramethylene)glycol(PTMO). By using N-methyldiethanolamine and 2,2-bis(hydroxyme-thyl)propionic acid as the chain extenders, cationic and anionic polyurethane ionomers were synthesized. Acetone process was used to prepare monodisperse polyurethane ionomer in water. The particle size of anionic polyurethane obtained from light scattering is 231.9±8.5nm and cationic polyurethane is 108.3±3.8nm. Zeta potential of anionic polyurethane particle is –41.5±4.3mV, and cationic polyurethane particle is 61.5±5.2mV. The absolute values of zeta potentials are larger than 30mV, the results show that cationic and anionic polyurethane particles synthesized through acetone process are very stable. There are two systems studied in this experiment. In one system, anionic polyurethane and polyaniline polystyrensulfonic acid complex(PSS/PAni) were blended to form the composite material. The conductivity of this composite material approaches the conductivity of pure PSS/PAni complex when the content of PSS/PAni reaches 25%. In another system, conductive polypyrrole was grown on the cationic polyurethane ionomer seed by polymerization of pyrrole to form the core-shell structure. The result shows that the conductivity increases with increasing content of polypyrrole. Compared to the conductivity of polyurethane, 1.75×10-9 S/cm, the conductivity of polypyrrole/polyurethane synthesized in mother liquid containing 3wt% pyrrole monomer is 7.69×10-7 S/cm. Polypyrrole/polyurethane synthesized in mother liquid containing more than 3wt% is not stable in suspension. We have developed a feasible route for preparing the composite material of conducting polymer and polyurethane to improve the processibility.
    Appears in Collections:[化學工程與材料工程研究所] 博碩士論文

    Files in This Item:

    File 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 ©   - 隱私權政策聲明