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首页> 外文期刊>Materials Chemistry and Physics >Poly(N-methylaniline) microsphere formation and control of the average diameter by simple chemical polymerization
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Poly(N-methylaniline) microsphere formation and control of the average diameter by simple chemical polymerization

机译：聚（N-甲基苯胺）微球的形成和通过简单的化学聚合反应控制平均直径

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Microspheres of conducting poly(N-mefhylaniline) (PNMA) were successfully synthesized in aqueous solutions through chemical polymerization using only N-mefhylaniline as monomer, acid and oxidant without any templates. The microspheres were obtained only from acid solutions containing highly lyophilic anions such as ClO_4~-, BF_4~- and adipate ions. Several oxidants were employed and (N_H4)_2S_2O_8 was found to be the most appropriate for the microsphere formation. The average diameter of the microspheres with smooth surfaces was 0.38 μm when 25 mM N-methylaniline was oxidized with 25 mM (NH_4)_2S_2O_8 in 25 mM adipic acid solution at 25 ℃. Although the average diameter was barely influenced by the acid concentration of the polymerizing solution, it could be controlled by three parameters: monomer concentration, reaction time and temperature. It was found further that the acid concentration is critical for the formation of the microspheres with smooth surfaces. The smooth surfaces were observed only when the acid concentration was less than 50 mM.
机译：仅使用N-甲基苯胺作为单体，酸和氧化剂而没有任何模板，通过化学聚合成功地在水溶液中成功合成了导电聚（N-甲基苯胺）（PNMA）微球。仅从包含高度亲液性阴离子如ClO 4-，BF 4-和己二酸根离子的酸性溶液中获得微球。使用了几种氧化剂，发现（N_H4）_2S_2O_8最适合形成微球。当25 mM N-甲基苯胺在25 mM己二酸溶液中于25℃下用25 mM（NH_4）_2S_2O_8氧化时，具有光滑表面的微球的平均直径为0.38μm。尽管平均直径几乎不受聚合溶液中酸浓度的影响，但可以通过三个参数控制该直径：单体浓度，反应时间和温度。进一步发现，酸浓度对于形成具有光滑表面的微球至关重要。仅当酸浓度小于50 mM时才观察到光滑的表面。

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