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The Study of Conductive Polymer Sound-absorption Film Material

Author: ZhaoZongHuang
Tutor: ZhangKaiCheng；ZhangZhiYong
School: Wuhan Polytechnic University
Course: Applied Chemistry
Keywords: polyaniline polypyrrole copper phthalocyanine emulsion polymerization graphite powder sound absorption coefficien
CLC: TB383.2
Type: Master's thesis
Year: 2011
Downloads: 114
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Abstract


S ound-abs orbing mate rial that now were avaliablied，incl udingpolyme r s ound- absor bing material，were wit h narr ow wave band，toothi ck and heavy．Thes edisadvanta ges seriously limited the use of them．In or der to impr ove the sound-a bsorption pr oper ties of the mate rial，polyanil ine，polypyr rol e，copper phthal ocyanine we re madefi rstly，thenmixed thes e polym ers with graphite、epoxy resin、polyam ide resin、met hylpyr rolidone as desi gened ratio in ball mill，at last，coated theseslur ry on differernt car riers and a kind of conducting so und-abs orbingfilm material were made，this film had exc ell ent sou nd-abs orbingproper ties，especi ally atlow wave band，then thefil m was thin and li ght．Thi cknes s gauge，di gital avo meter，SEM and intellige ntacoustic testerwere ado pted to tes t the thi ckness，conducti vity，morphol ogy andsound-a bsorbing proper ties of the material．Thefact or s whi ch aff ectedthe sound -abso rption proper ties were als o disc ussed．The concl usio n wereas follow ing：1．When n （APS）：n （An）：n （DBSA） was 1.6：1：1，and polymeri zationtime was 20 hours，polyanil ine with a conductivity of 0. 2 5 s/cm could begot．2．when n （APS）：n （An）：n （DBSA） was 1：1：2，the polymerizationtem perat ure was 0℃，polypyr rol e with a conductivity of 0. 2 2 s/cm couldbe got．3．It woul d be better to add the cataly ze r s when the reactant s mel tedin uni for m and tem perat ure as cended to reactio n tempe rat ure，on thiscondition，a kind of ei ght carboxyl copper pht hal ocyanine with aelec trical conducti vit y value of 10-3 S/ cm wa s made，the elec trical conductivi ty value was 10 6 times of non - substit ution copperphthal ocyanine．4．When the ratio of conductive polym ers and graphi te was 2：4，material thi ckness was about 300μm，rotate d speed of the ball mill was252 r/m in，ball milling time was 4h and cavit y on it s back was 8.5cm，thefilm wi th bes t sound-abs orbing proper ties could be got，The averagesound absor ption coefficient bet we en 4000H z and 125H z exceeded 0. 5，maximum abs orption coefficient sreached 0. 95，which fille d the gap ofpoor sound- absor bing per for manc e at low fre quency．

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