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以偶氮二异丁氰(AIBN)为引发剂,二硫化二异丙基黄原酸酯(DIP)为RAFT试剂,引发活性较大的单体苯乙烯(S)和活性较小的单体N-乙烯基乙酰胺(NVA)聚合,成功合成了结构明确、分子量分布较窄(Mw/Mn=1.39)的PSb-PNVA嵌段共聚物并对嵌段共聚物的自组装行为进行了研究。利用凝胶渗透色谱、傅里叶变换红外光谱、核磁共振、纳米粒度仪和透射电镜对嵌段共聚物的分子量、结构及其在水溶液中的聚集行为进行了研究。详细考察了聚合反应温度、RAFT试剂用量、聚苯乙烯分子量等条件对嵌段共聚物的分子量及分布的影响以及嵌段共聚物结构、浓度和水含量等因素对嵌段共聚物形成的胶束的粒径的影响。
Using azobisisobutyronitrile (AIBN) as initiator and diisopropyl xanthogen disulfide (DIP) as RAFT reagent, the more reactive monomers styrene (S) and less active monomers The PSb-PNVA block copolymer with well-defined molecular structure and narrow molecular weight distribution (Mw / Mn = 1.39) was successfully synthesized by N-vinyl acetamide (NVA) polymerization and the self-assembly behavior of the block copolymer was studied. The molecular weight, structure and aggregation behavior of the block copolymer in aqueous solution were investigated by gel permeation chromatography, Fourier transform infrared spectroscopy, nuclear magnetic resonance, nanoparticle size analyzer and transmission electron microscopy. The effects of polymerization temperature, amount of RAFT reagent and molecular weight of polystyrene on the molecular weight and distribution of the block copolymer, the structure, concentration and water content of the block copolymer were investigated in detail. The effect of particle size.