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合成了以酯键和醚键相连的苯和联苯作为刚棒B嵌段,以聚合度为7,12和17的聚环氧乙烷为A嵌段及辛基或十六烷基为C嵌段的ABC型三嵌段线团-刚棒-线团分子.通过核磁共振氢谱和基质辅助激光解吸电离时间飞行质谱(MALDI-TOF MS)对其结构进行了表征,利用偏光显微镜(POM)、示差扫描量热法(DSC)和小角X射线散射实验(SAXS)对其本体状态下的自组装行为进行了研究.结果表明,聚环氧乙烷聚合度为7、烷基链分别为辛基和十六烷基的化合物1a和2a在固相和液晶态分别自组装成倾斜柱状结构和矩形柱状结构,而具有长聚环氧乙烷链的化合物2b、2c和1c在固相都自组装成倾斜柱状结构.发现聚环氧乙烷链和烷基链的长度显著地影响线团-刚棒-线团分子体系的自组装行为.通过改变线团-刚棒-线团分子体系中柔性链长度的策略,可以精确地调控刚柔三嵌段共聚物的聚集体结构.
Synthesis of the ester bond and ether link benzene and biphenyl as a rigid B block to the degree of polymerization of 7,12 and 17 for the polyethylene oxide block A and octyl or cetyl C The ABC-type triblock-rod-rod-coil molecules were characterized by 1H-NMR and matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) ), Differential scanning calorimetry (DSC) and small-angle X-ray scattering (SAXS) were used to investigate the self-assembly behaviors of the self-assembly in bulk state. The results showed that the degree of polymerization of polyethylene oxide was 7, Octyl and hexadecyl compounds 1a and 2a self-assemble into a skewed columnar structure and a rectangular columnar structure respectively in the solid phase and the liquid crystal state, while compounds 2b, 2c and 1c having long polyethylene oxide chains were both solid-phase Self-assembled into a tilted columnar structure .It was found that the length of the polyethylene oxide chain and the alkyl chain significantly affect the self-assembly behavior of the wire-rod-rod-wire system. By changing the wire-rod- Flexible chain length of the strategy, you can accurately control rigid and soft triblock copolymer aggregate structure.