以磺酸改性的SBA-15(SO_3H-SBA-15)为催化剂,丙烯酸与莰烯为原料加成反应制备丙烯酸异冰片酯(IBOA)。在转速600 r/min下消除外扩散的影响,并采集反应动力学数据。将SO3H-SBA-15催化莰烯异构化副反应生成的α-松油烯、柠檬烯、葑烯归类...以磺酸改性的SBA-15(SO_3H-SBA-15)为催化剂,丙烯酸与莰烯为原料加成反应制备丙烯酸异冰片酯(IBOA)。在转速600 r/min下消除外扩散的影响,并采集反应动力学数据。将SO3H-SBA-15催化莰烯异构化副反应生成的α-松油烯、柠檬烯、葑烯归类为异构烯烃,与丙烯酸加成生成的相应丙烯酸酯归类为丙烯酸异构酯,采用拟一级动力学模型进行数据回归,得到丙烯酸与莰烯加成酯化、烯烃异构以及异构烯烃酯化反应的反应热分别为-9.41、-31.32和-13.39 k J/mol,动力学拟合结果与实验数据吻合良好,并且通过统计检验,表明动力学模型是可靠的。展开更多
A Aeries of hydroxylic hyperbranched polymers were derived from 2,2-bis(methylol) propionic acid and tris(methylol) propane reacted with acrylic acid to various extents. The obtained acrylated hyperbranched polymers a...A Aeries of hydroxylic hyperbranched polymers were derived from 2,2-bis(methylol) propionic acid and tris(methylol) propane reacted with acrylic acid to various extents. The obtained acrylated hyperbranched polymers alone or with a monofunctional diluent, isobornylene acrylate(IBOA) were further cured by UV radiation. The cured films based on the modified polymers alone all demonstrated poor mechanical properties due to their high network densities and low moving ability of polymer chains. For the composite systems, the cured films demonstrated improved mechanical properties due to the low network densities and high chain moving ability. With more IBOA included in the systems, acrylate groups can react to a higher extent during the curing process.展开更多
文摘以磺酸改性的SBA-15(SO_3H-SBA-15)为催化剂,丙烯酸与莰烯为原料加成反应制备丙烯酸异冰片酯(IBOA)。在转速600 r/min下消除外扩散的影响,并采集反应动力学数据。将SO3H-SBA-15催化莰烯异构化副反应生成的α-松油烯、柠檬烯、葑烯归类为异构烯烃,与丙烯酸加成生成的相应丙烯酸酯归类为丙烯酸异构酯,采用拟一级动力学模型进行数据回归,得到丙烯酸与莰烯加成酯化、烯烃异构以及异构烯烃酯化反应的反应热分别为-9.41、-31.32和-13.39 k J/mol,动力学拟合结果与实验数据吻合良好,并且通过统计检验,表明动力学模型是可靠的。
基金Supported by the National Natural Science Foundation of China(No.2 0 2 0 4 0 0 5 ,5 0 2 330 30 ) and Basic Research Fund ofTsinghua University(No.JC2 0 0 2 0 30 )
文摘A Aeries of hydroxylic hyperbranched polymers were derived from 2,2-bis(methylol) propionic acid and tris(methylol) propane reacted with acrylic acid to various extents. The obtained acrylated hyperbranched polymers alone or with a monofunctional diluent, isobornylene acrylate(IBOA) were further cured by UV radiation. The cured films based on the modified polymers alone all demonstrated poor mechanical properties due to their high network densities and low moving ability of polymer chains. For the composite systems, the cured films demonstrated improved mechanical properties due to the low network densities and high chain moving ability. With more IBOA included in the systems, acrylate groups can react to a higher extent during the curing process.
