The diblock copolymers of methyl acrylate and perfluoroalkyl ethyl acrylate(FAEA) were synthesized by atom transfer radical polymerization (ATRP).GPC, 1H-NMR and fluorine-elementary analysis (F-EA) were used to study ...The diblock copolymers of methyl acrylate and perfluoroalkyl ethyl acrylate(FAEA) were synthesized by atom transfer radical polymerization (ATRP).GPC, 1H-NMR and fluorine-elementary analysis (F-EA) were used to study the structure of the block copolymers.To combine GPC with NMR and to combine GPC with F-EA were used to calculate the block length.It was found interestingly that the results of 1H-NMR showed a “temperature-dependent" feature.It means the relative ratios of MA block to FAEA block calculated from NMR were changed with measuring temperature.It might be caused by the formation of molecular association.Temperature and solvents can affect the degree of association.Therefore, 1H-NMR and GPC can’t be used in quantitative analysis of the fluorinated diblock copolymer.To combine GPC with F-EA is suitable for the characterization of fluorinated diblock copolymers.展开更多
以间十五烷基酚与丙烯酰氯为原料,离子液体为催化剂,三乙胺为敷酸剂,制备了间十五烷基丙烯酸苯酯(PDPA)。用FT-IR、1 H NMR、13 C NMR和质谱对产物结构进行了表征,并对合成工艺进行了优化。适宜工艺条件为:离子液体用量为间十五烷基酚...以间十五烷基酚与丙烯酰氯为原料,离子液体为催化剂,三乙胺为敷酸剂,制备了间十五烷基丙烯酸苯酯(PDPA)。用FT-IR、1 H NMR、13 C NMR和质谱对产物结构进行了表征,并对合成工艺进行了优化。适宜工艺条件为:离子液体用量为间十五烷基酚质量的2.0%,反应时间8h,反应温度50℃,n(丙烯酰氯)∶n(间十五烷基酚)=1.13∶1,产物间十五烷基丙烯酸苯酯的收率为85%。展开更多
文摘The diblock copolymers of methyl acrylate and perfluoroalkyl ethyl acrylate(FAEA) were synthesized by atom transfer radical polymerization (ATRP).GPC, 1H-NMR and fluorine-elementary analysis (F-EA) were used to study the structure of the block copolymers.To combine GPC with NMR and to combine GPC with F-EA were used to calculate the block length.It was found interestingly that the results of 1H-NMR showed a “temperature-dependent" feature.It means the relative ratios of MA block to FAEA block calculated from NMR were changed with measuring temperature.It might be caused by the formation of molecular association.Temperature and solvents can affect the degree of association.Therefore, 1H-NMR and GPC can’t be used in quantitative analysis of the fluorinated diblock copolymer.To combine GPC with F-EA is suitable for the characterization of fluorinated diblock copolymers.
文摘以间十五烷基酚与丙烯酰氯为原料,离子液体为催化剂,三乙胺为敷酸剂,制备了间十五烷基丙烯酸苯酯(PDPA)。用FT-IR、1 H NMR、13 C NMR和质谱对产物结构进行了表征,并对合成工艺进行了优化。适宜工艺条件为:离子液体用量为间十五烷基酚质量的2.0%,反应时间8h,反应温度50℃,n(丙烯酰氯)∶n(间十五烷基酚)=1.13∶1,产物间十五烷基丙烯酸苯酯的收率为85%。