Styrene emulsion polymerization using an alkyl-9-BBN, synthesized by reacting 9-BBN（9-borabicyclo-[3.3.1]-nonane） and styrene, in an aqueous sodium dodecyl sulfate（SDS） solution was studied. Ultra-high-molecular-w...Styrene emulsion polymerization using an alkyl-9-BBN, synthesized by reacting 9-BBN（9-borabicyclo-[3.3.1]-nonane） and styrene, in an aqueous sodium dodecyl sulfate（SDS） solution was studied. Ultra-high-molecular-weight（〉 1.0 × 10~7） polystyrene was synthesized using a radical initiator formed through the aerobic oxidation of this alkyl-9-BBN in a high yield（〉 80%）. The kinetics of this emulsion polymerization of styrene with the alkyl-9-BBN was investigated. We confirmed that in the initial stage of the polymerization, the initial reaction rate followed first-order kinetics. The activation energy for this emulsion polymerization of styrene was approximately 56.2 kJ/mol.展开更多
本文合成了五种新型配合茂金属催化剂,并对其进行核磁等表征,然后利用其对乙烯均聚反应进行研究,考察催化剂的活性,并对生成的聚合物进行分子量及分布、动摩擦系数、冲击强度、粒径及其分布的表征。得到的共聚物的分子量较文献报道的有...本文合成了五种新型配合茂金属催化剂,并对其进行核磁等表征,然后利用其对乙烯均聚反应进行研究,考察催化剂的活性,并对生成的聚合物进行分子量及分布、动摩擦系数、冲击强度、粒径及其分布的表征。得到的共聚物的分子量较文献报道的有明显提高。聚合活性最高可达7.8 kg PE/g催化剂·2小时,聚合物的重均分子量最高可达38.5×10^(5)。展开更多
文摘Styrene emulsion polymerization using an alkyl-9-BBN, synthesized by reacting 9-BBN（9-borabicyclo-[3.3.1]-nonane） and styrene, in an aqueous sodium dodecyl sulfate（SDS） solution was studied. Ultra-high-molecular-weight（〉 1.0 × 10~7） polystyrene was synthesized using a radical initiator formed through the aerobic oxidation of this alkyl-9-BBN in a high yield（〉 80%）. The kinetics of this emulsion polymerization of styrene with the alkyl-9-BBN was investigated. We confirmed that in the initial stage of the polymerization, the initial reaction rate followed first-order kinetics. The activation energy for this emulsion polymerization of styrene was approximately 56.2 kJ/mol.
文摘本文合成了五种新型配合茂金属催化剂,并对其进行核磁等表征,然后利用其对乙烯均聚反应进行研究,考察催化剂的活性,并对生成的聚合物进行分子量及分布、动摩擦系数、冲击强度、粒径及其分布的表征。得到的共聚物的分子量较文献报道的有明显提高。聚合活性最高可达7.8 kg PE/g催化剂·2小时,聚合物的重均分子量最高可达38.5×10^(5)。
