Ceric ion homogeneous redox systems for polymerization of vinyl monomers 硝酸铈铵均相氧化还原体系引发烯类单体聚合
Homogeneous precipitation method was used to prepare nanometer-sized MgO, its characterization and catalytic properties were studied by XRD, IR, UV, TPD and viscosity measurement methods. Researches have shown that activated nanometer-sized MgO had high catalytic property for polymerization of bismaleimide. 采用均匀沉淀法制备了纳米粒子MgO,并以XRD、IR、UV及粘度测定等方法对纳米MgO及其催化性能进行了研究,发现纳米MgO对双马来酰亚胺的聚合具有很高的催化活性。
Progress in Synthesis of Homogeneous Chromium Catalysts and Their Application in Olefin Polymerization 均相铬系催化剂的合成与催化α-烯烃聚合的进展
This paper describes the application of supercritical fluid technology in enzymatic reaction, heterogeneous catalytic reaction, organometallic reaction, homogeneous catalytic reaction, macromolecular polymerization, supercritical water reaction. 综合评述了超临界流体技术在酶催化反应、多相催化反应、金属有机反应、均相催化反应、高分子聚合反应、超临界水化学反应中的应用。
HOMOGENEOUS METALLOCENE CATALYST FOR POLYMERIZATION ⅱ. Study on Ethylene/ 1-hexene and Ethylene/ propylene Copolymerization 均相金属茂催化剂烯烃聚合的研究&Ⅱ.乙烯-己烯、乙烯-丙烯共聚的研究
Late-Transition Metal-Fe(ⅱ) Catalysts for Ethylene Homogeneous Polymerization 后过渡金属铁系聚烯烃催化剂的乙烯均相聚合研究
In this paper, the new progress in homogeneous catalyst is reviewed. It includes homogeneous catalyst oxidation, olefin polymerization homogeneous catalyst, hydrogenation homogeneous catalyst, heterogenization of homogeneous catalyst and homogeneous catalysis mechanism. 综述了国内外均相催化的最新进展,包括均相催化氧化、烯烃聚合均相催化、加氢均相催化、均相催化多相化新进展及均相催化机理等。
Progress in research on active centers of homogeneous catalysts for olefin polymerization(ⅱ) 均相烯烃聚合催化剂活性中心的研究进展(Ⅱ)
One-component and two-component homogeneous/ heterogeneous polymerization systems share both "living" characteristics and certain controllability. 而均相和非均相气相的一组分和两组分聚合体系以其活性特征和可控性倍受关注;
Ceric ion homogeneous redox systems for polymerization of vinyl monomers and effect of HMPA on polymerization. 硝酸铈铵(CAN)均相氧化还原引发烯类单体聚合和六甲基膦酰三胺(HMPA)对聚合的影响。
Unmodified titania is too hydrophilic to stabilize initial droplets, which induces homogeneous nucleation and the formation of solid spheres. The stabilization effect of titania works step by step during polymerization. 未改性二氧化钛由于过度亲水不利于稳定初始液滴,在聚合过程中会发生液滴的瓦解,只能通过水相成核得到聚苯乙烯实心微球,二氧化钛的稳定作用是在聚合过程中逐步实现的。
A few influencing factors of homogeneous polymerization, such as pH and the process of GDA addition, are studied to solute those defects. 为了克服这些缺点,本文对均相反应中的一些影响因素如:pH值和GDA加入方式等进行了研究。
The results shows that the modifier PVA system makes the reaction system more homogeneous and the cross-linking of resorcinol is better to high polymerization of urea-formaldehyde prepolymer, as would achieve the better coating. 结果表明系统改性剂聚乙烯醇使得反应体系的乳化更为均一,更利于对芯材的包覆。间苯二酚交联剂的加入有利于脲醛预聚体的高聚反应,从而实现对芯材的更好包覆。
Zinc oxide particles were prepared by homogeneous precipitation method and modified with different methods. On the basis of above process, ZnO/ polymer composite particles were prepared by in-situ polymerization and soapless emulsion polymerization. 采用均匀沉淀化学法制备了氧化锌微粒,并用不同的方法进行了改性研究,在此基础上分别采用原位聚合和无皂乳液聚合制备了氧化锌/聚合物复合微粒材料。