侧基为苯胺四聚体的聚丙烯酰胺的合成和表征

以异溴丁酸羟乙酯为引发剂、溴化亚铜和2,2′-联吡啶为催化剂和配体,引发丙烯酸琥珀酰胺酯(NAS)进行原子转移自由基聚合,得到的聚丙烯酸琥珀酰胺酯(PNAS)的分子量可以通过配比和转化率预测.进一步与单端氨基苯胺四聚体(TA)在50℃下反应,得到的聚合物用1H-NMR和FT-IR的测试,结果表明,当TA/NAS的摩尔比为3∶1时,PNAS上的琥珀酰胺酯可以完全被取代,从而得到侧链为苯胺四聚体的导电高分子.聚合物的结构和分子量以及分布用核磁共振氢谱、FT-IR和GPC进行表征;电化学性质用循环伏安法进行了测试.

SYNTHESIS AND CHARACTERIZATION OF POLY(TETRAANILINE ACRYLIMIDE)

Poly(N-acryloxysuccinimide)(PNAS) was synthesized by atom transfer radical polymerization(ATRP) with 2-hydroxyethyl-2-bromoisobutyrate((HEBriB)/CuBr/2,2′bipyridine)(bpy) as the initiation system.Its molecular weights can be predicted from the molar ratio of NAS/HEBriB in feed and the conversion.N-oxysuccinimide(NS) groups in PNAS are very active,and can be easily substituted by amino compounds,such as butylamine,etc.So PNAS is used as precursor in preparation of conductive polymers.The polyacrylimide containing tetraaniline(PAA-NH(PhNH)_3Ph) was successively prepared by the reaction of PNAS with amine capped tetraaniline(NH_2(PhNH)_3Ph) at 50℃ for 24 h.The substitution reaction efficiency is determined by the reaction temperature and the feed ratio of NS units to amine capped tetraaniline.When the substitution reaction was carried out at 50℃ with a molar ratio of NS/tetraaniline 1∶3,()~1H-NMR and FT-IR spectra of the product showed that the NS units in PNAS were substituted almost completely.While,only 10% NS was substituted at room temperature using the same feed ratio.The cyclic voltammetry measurements of the product showed two oxidation peaks at 0.4 and 0.62 V.This provides a new route to synthesize conductive polymers with aniline oligomers as side chains.