ABSTRACT The reverse atom transfer radical polymerization (RATRP) of acrylonitrile (AN) was carried out in N, N-dimethylformamide (DMF) with AIBN as initiator, FeCl3•6H2O/triphenylphosphine (PPh3) and FeCl3•6H2O/pentamethyldle-thylenetrlamlne (PMDETA) as catalytic systems, respectively. Effect of reaction time and initiator concentration on polymerization rate, molecular weight and molecular weight distribution were investigated in detail. The Fourier transform infrared spectrometer (FTIR) and 1H nuclear magnetic resonance spectroscopy (1HNMR) were employed to analyze the chain end of the PAN. Gel permeation chromatography (GPC) was applied to measure the molecular weight and polydispersity index (PDI) of PAN. The polymerization demonstrated a typical pseudo first-order kinetics characteristics as evidenced by the number-average molecular weights (Mn) increasing linearly with monomer conversion; the Mn decreasing with the increasing of the initiator concentration. Meanwhile, the low PDI value (<1.2) indicated the controllability of polymerization.

中文翻译：

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反向原子转移自由基聚合合成分子量可调、低多分散指数（PDI）的PAN

摘要 以AIBN为引发剂，FeCl3•6H2O/三苯基膦(PPh3)和FeCl3•6H2O/五甲基三乙胺(PMDETA)在N,N-二甲基甲酰胺(DMF)中进行丙烯腈(AN)反向原子转移自由基聚合(RATRP)。 ）分别作为催化系统。详细研究了反应时间和引发剂浓度对聚合速率、分子量和分子量分布的影响。采用傅里叶变换红外光谱仪（FTIR）和1H核磁共振光谱仪（1HNMR）对PAN的链端进行分析。采用凝胶渗透色谱（GPC）测定PAN的分子量和多分散指数（PDI）。聚合表现出典型的准一级动力学特征，数均分子量（Mn）随单体转化率线性增加即可证明；Mn随着引发剂浓度的增加而降低。同时，较低的PDI值（<1.2）表明聚合的可控性。