To obtain a novel support with practical value for metallocene catalyst(\%η\%\|C\-5H\-5)TiCl\-3(CpTiCl\-3), poly(styrene\|co\|4\|vinylpyridine)/SiO\-2 nanoscale hybrid material(SrP/SiO\-2) was firstly produced as sup...To obtain a novel support with practical value for metallocene catalyst(\%η\%\|C\-5H\-5)TiCl\-3(CpTiCl\-3), poly(styrene\|co\|4\|vinylpyridine)/SiO\-2 nanoscale hybrid material(SrP/SiO\-2) was firstly produced as support. After pretreatment by methylaluminoxane(MAO), the hybrid materials reacted with CpTiCl\-3. The results from SAXS, SEM and TEM indicated the morphology and structure of organic/inorganic hybrid materials, and the size of inorganic particle in hybrid was nanoscale. The results from IR and XPS showed that there were two possible cationic active species in the hybrid\|supported catalyst, the polymerization results of styrene proved this possibility.展开更多
以过氧化苯甲酰(BPO)为引发剂,甲苯为溶剂,采用溶液沉淀聚合工艺合成了苯乙烯-马来酸酐共聚物,并详细考察了聚合温度、引发剂用量、单体配比及聚合时间对聚合反应的影响.结果表明在温度80℃、引发剂用量0.7%、苯乙烯与马来酸酐配比1∶1...以过氧化苯甲酰(BPO)为引发剂,甲苯为溶剂,采用溶液沉淀聚合工艺合成了苯乙烯-马来酸酐共聚物,并详细考察了聚合温度、引发剂用量、单体配比及聚合时间对聚合反应的影响.结果表明在温度80℃、引发剂用量0.7%、苯乙烯与马来酸酐配比1∶1、时间2h的条件下,聚合物收率可达96.6%.用13 C NMR、IR、GPC、元素分析对共聚物进行了表征,并采用TG测定了其热稳定性.聚合残液的HPLC、共聚物的元素分析与13 C NMR的分析结果表明,合成的苯乙烯-马来酸酐共聚物是一种交替共聚物.展开更多
文摘To obtain a novel support with practical value for metallocene catalyst(\%η\%\|C\-5H\-5)TiCl\-3(CpTiCl\-3), poly(styrene\|co\|4\|vinylpyridine)/SiO\-2 nanoscale hybrid material(SrP/SiO\-2) was firstly produced as support. After pretreatment by methylaluminoxane(MAO), the hybrid materials reacted with CpTiCl\-3. The results from SAXS, SEM and TEM indicated the morphology and structure of organic/inorganic hybrid materials, and the size of inorganic particle in hybrid was nanoscale. The results from IR and XPS showed that there were two possible cationic active species in the hybrid\|supported catalyst, the polymerization results of styrene proved this possibility.
文摘以过氧化苯甲酰(BPO)为引发剂,甲苯为溶剂,采用溶液沉淀聚合工艺合成了苯乙烯-马来酸酐共聚物,并详细考察了聚合温度、引发剂用量、单体配比及聚合时间对聚合反应的影响.结果表明在温度80℃、引发剂用量0.7%、苯乙烯与马来酸酐配比1∶1、时间2h的条件下,聚合物收率可达96.6%.用13 C NMR、IR、GPC、元素分析对共聚物进行了表征,并采用TG测定了其热稳定性.聚合残液的HPLC、共聚物的元素分析与13 C NMR的分析结果表明,合成的苯乙烯-马来酸酐共聚物是一种交替共聚物.
