4,4′-二(硬脂酰胺基)二苯甲烷在乙烯基类单体中的分子组装及其结构形态研究

MOLECULAR ASSEMBLY OF 4,4′-BIS(STEAROLAMINO)DIPHENYL METHANE IN VINYL MONOMERS AND STRUCTURES BEFORE/AFTER POLYMERIZATION

4,4′-二(硬脂酰胺基)二苯甲烷(BSDM)能在乙烯基类单体中进行聚集、自组装,并可使苯乙烯、丙烯酸丁酯、甲基丙烯酸甲酯、甲基丙烯酸-2-羟基乙酯等凝胶化,形成相应的分子凝胶.凝胶/溶胶相变温度(TGS)与BSDM浓度有关,BSDM质量分数越大,凝胶体系中分子间氢键和π-π键越多,要破坏它们所需要的能量越高,TGS因而也就越高.透射电镜表明,BSDM在各种可聚合溶剂中通过分子间相互作用形成类似纤维状的聚集体结构.BSDM在可聚合溶剂聚合前后的偏光显微照片表明,BSDM在体系中的晶型结构是球晶.

4,4＇-bis（stearolamino）diphenyl methane （BSDM） can aggregate and self-assembly in vinyl monomers. As a result, the molecular gels of monomers, such as styrene, butyl acrylate, methyl methaerylate and 2-hydroxyethyl methacrylate can be formed by BSDM aggregates. The temperature of gel/sol transition （ TGs ） was related to the concentration of BSDM. Increased mass fraction of BSDM resulted in an increase of hydrogen bonds and π-π stack in the system, which need more energy to destroy. TEM pictures showed that BSDM self-assembled into long fibres by non-covalent interactions in vinyl monomers. POM pictures showed the formation of spherulites undergoing aggregation of self-assembled fibres before and after polymerization of vinyl monomers.