当前位置：
X-MOL 学术
›
Ind. Eng. Chem. Res.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Intensification of Polymerization Processes by Reactive Extrusion
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-02-14 , DOI: 10.1021/acs.iecr.0c05078 Tian-Tian Li 1 , Lian-Fang Feng 1, 2 , Xue-Ping Gu 1, 2 , Cai-Liang Zhang 1, 2 , Pan Wang 3 , Guo-Hua Hu 3
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-02-14 , DOI: 10.1021/acs.iecr.0c05078 Tian-Tian Li 1 , Lian-Fang Feng 1, 2 , Xue-Ping Gu 1, 2 , Cai-Liang Zhang 1, 2 , Pan Wang 3 , Guo-Hua Hu 3
Affiliation
|
The unique geometry of screw extruders allows handling very viscous media; thus, they can be used as continuous reactors to conduct polymerization reactions without using any solvents. This is called reactive extrusion polymerization. It is an intensified process as it maximizes reaction rates upon maximizing the concentrations of monomers and an initiator/catalyst (if there is any). It also allows conducting polymerization reactions at higher temperatures, without having to take measures to prevent solvents from evaporating or to work under pressure. However, screw extruders are not suitable for the early stage of polymerization in which the viscosity of the polymerization system may not be high enough for the rotation of the screws to generate a steady flow. A combination of continuously stirred tank reactors and a twin-screw extruder or several in series is preferred for the polymerization process. This review shows how reactive extrusion may intensify different types of polymerization processes under the constraint of no solvents, such as free-radical polymerization, anionic polymerization, ring-opening polymerization, and polycondensation, on one hand; and how challenges are met, on the other hand.
中文翻译：
通过反应挤出强化聚合过程
螺杆挤出机的独特几何形状允许处理非常粘稠的介质；因此，它们可以用作连续反应器以进行聚合反应而无需使用任何溶剂。这称为反应挤出聚合。这是一个强化的过程，因为它在最大化单体和引发剂/催化剂（如果有）的浓度时最大化了反应速率。它还允许在更高的温度下进行聚合反应，而不必采取措施来防止溶剂蒸发或在压力下工作。但是，螺杆挤出机不适用于聚合的早期阶段，在聚合初期，聚合体系的粘度可能不足以使螺杆旋转以产生稳定的流动。连续搅拌釜式反应器和双螺杆挤出机或数个串联的组合优选用于聚合过程。这项综述一方面显示了反应性挤出如何在无溶剂的约束下增强不同类型的聚合过程，例如自由基聚合，阴离子聚合，开环聚合和缩聚反应；另一方面，如何应对挑战。
更新日期：2021-02-24
中文翻译：
通过反应挤出强化聚合过程
螺杆挤出机的独特几何形状允许处理非常粘稠的介质；因此，它们可以用作连续反应器以进行聚合反应而无需使用任何溶剂。这称为反应挤出聚合。这是一个强化的过程，因为它在最大化单体和引发剂/催化剂（如果有）的浓度时最大化了反应速率。它还允许在更高的温度下进行聚合反应，而不必采取措施来防止溶剂蒸发或在压力下工作。但是，螺杆挤出机不适用于聚合的早期阶段，在聚合初期，聚合体系的粘度可能不足以使螺杆旋转以产生稳定的流动。连续搅拌釜式反应器和双螺杆挤出机或数个串联的组合优选用于聚合过程。这项综述一方面显示了反应性挤出如何在无溶剂的约束下增强不同类型的聚合过程，例如自由基聚合，阴离子聚合，开环聚合和缩聚反应；另一方面，如何应对挑战。
京公网安备 11010802027423号