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中文摘要：
利用1H NMR方法，研究了高浓度的P123（PEO20PPO30PEO20）在重水溶液中的溶胶一凝胶转变过程．升高温度使得体系发生溶胶一凝胶转变，进一步升高温度，体系发生凝胶一溶胶转变．通过对不同质子基团的谱线宽度和化学位移偏移的分析，同时结合流变学频率扫描和同步辐射（SR）研究，发现质量分数为30％的P123的重水溶液在凝胶化过程中，结构经历了由立方相（cubic）一六角柱状相（hcp）-层状相（1amellar）的转变过程，其中立方相为面心立方（fcc）和六角密堆积球状相（hcps）的混合相．高温时从凝胶到溶胶的转变主要体现为P123形成富集区与水发生相分离的过程．
英文摘要：
1H NMR was used to study the sol-gel transition of triblock copolymer P123 （PEO20 PPOToPEO20, 30% ） in D2O solution by analyzing the half-height width and the chemical shift of the proton signals of the P123. The changes of gel structures for P123 （30%） was investigated with theological method and synchrotron radiation （SR）. With the increase of temperature, the transition of gel phases from fcc ＋ heps to hcp structure and finally to lamellar structure were found. Moreover, the phase separation occurred for the P123 in D2O solution at high temperature.
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