摘要
研究了4,4′-偶氮二[4-氰基戊酰(对-二甲基氨基)苯胺](ACPDA)过/氧化二苯甲酰(BPO)氧化还原引发体系在N,N-二甲基甲酰胺(DMF)中引发苯乙烯(St)的聚合及其动力学行为。考察了聚合反应温度、单体浓度、ACPDA浓度和BPO浓度对聚合物分子量和聚合反应速率的影响,测定了反应级数和聚合反应的活化能。实验结果表明:在一定范围内,聚合反应速率随单体浓度、ACPDA浓度、BPO浓度的增加和反应温度的升高而加快;聚合物分子量随单体浓度的增大而增大,随ACPDA浓度、BPO浓度的增大和反应温度的升高而降低。该体系具有氧化还原引发体系的特点,其聚合速率方程为Rp=K[St]1.52[ACPDA]0.56[BPO]0.49,聚合反应的表观活化能Ea=35.43 kJ/mo。
The kinetics of styrene （ St ） polymerization initiated by 4,4＇ - azobis - （4 - cyanopentanoyl （ p - dimethylamino ） anilide） （ACPDA） / dibenzoyl peroxide （BPO） redox system was studied in N , N - dimethyl formamide. The effects of concentrations of the monomer, ACPDA, BPO and the temperature on the polymerization rate were studied. The reaction order and the activation energy were determined. The results indicated that the polymerization rate increases with increasing the concentrations of monomer, ACPDA, BPO as well as the reaction temperature. The system possesses the characteristics of a redox initiation system. The equation of the polymerization rate is Rp = K[ BPO ]^ 0.49[ ACPDA ]^ 0.56[ St ] ^1.52 with an apparent activation energy of 35.43 k J/tool for St Polymerization.
出处
《辽宁化工》
CAS
2008年第10期660-663,672,共5页
Liaoning Chemical Industry
基金
辽宁省科学技术基金资助项目(20061020)
