(中南大學(xué) 冶金科學(xué)與工程學(xué)院，長(zhǎng)沙 410017)
摘 要: 采用化學(xué)氧化法制備聚間苯二胺，并采用環(huán)氧氯丙烷及三乙烯四胺等多胺為原料，制備一類新型改性聚間苯二胺。研究溶劑等不同因素對(duì)合成反應(yīng)及其硫酸根離子吸附的影響，并利用FTIR、TG及溶解性測(cè)試等進(jìn)行結(jié)構(gòu)性能表征。結(jié)果表明：與未改性聚間苯二胺相比，胺化改性后的聚間苯二胺吸附硫酸根離子的性能得到大幅提升，在本研究吸附條件下，其吸附量達(dá)到了187.5 mg/g。胺化改性可以降低改性聚間苯二胺的溶劑溶解性，在40~250 ℃范圍內(nèi)，其熱穩(wěn)定性也有所提高。對(duì)聚間苯二胺合成改性的機(jī)理進(jìn)行了初步探討。
關(guān)鍵字: 聚間苯二胺；胺化；吸附；硫酸根離子
（School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract:Poly(m-phenylenediamine) (PmPD) synthesized by chemically oxidative polymerization was modificated with epichlorohydrin and amination. The influences of various factors were investigated, including the aminating agents, solvent and reaction temperature. Meanwhile, modificated PmPD was characterized through solubility tests, FTIR and TG. The results show that the sulfate adsorption performance of modified PmPD is enhanced obviously with an absorbance of 187.5 mg/g. The aminated modification leads to a lower solubility of the polymer adsorbent in some solvents and an improved thermostability in temperature range of 40?250 ℃. The modification mechanism was then discussed preliminarily.
Key words: poly(m-phenylenediamine) (PmPD); amination; adsorption; sulfate ion
