摘要
介绍一种新型的四功能引发剂LuperoxJWEB50,利用它引发苯乙烯自由基本体聚合。引发剂效率随引发剂浓度降低和聚合温度的增加而增加,当温度增加到～145℃时,引发剂效率在不同的引发剂浓度下几乎相同,约0.78～0.8。实验表明,在温度范围125～145℃时,采用该四功能引发剂引发的苯乙烯本体聚合的凝胶效应并不明显。并介绍一种单体转化率的测定方法,建立了考虑渗透和热引发的动力学模型来模拟聚合进程。模拟结果表明,即使单体转化率很高,此模型也能令人满意地预测聚合反应的进展。
The article introduces a new tetrafu nctional initiator Luperox JWEB50a nd uses it to initiate bulk free radic al polymerization of styrene.Through examination of t he polymerization rate,it is found t hat the monomer conversion can' t reach 100%when the initiator concentration is low or the polymerization temperature is relatively hi gh.The initiator efficiency f i is higher at a diluter concentration of the initiator and increases with the increase of reaction temperature.When the temperature increases to a certa in point,～145℃,the initiator efficiency becomes almost the same at different initiator con centrations,about 0.78～0.8.Experiments find that the gel effect of styrene polymerization is not signi ficant at the temperature range of 125～145℃with this initiator.Moreove r,the article introduces an effective examination method of mon omer conversion.A kinetic model is a lso established to simulate the poly merization process.Simulation results show the monomer can be conversed at a high conversion and the model can also satisfactoril y predict the progress of polymerization.
出处
《化工生产与技术》
CAS
2002年第4期1-6,共6页
Chemical Production and Technology
