查询词典 polymerization

By the testing means of electron-spectroscopy for chemical analysis , thermogravimetric analysis , differential scanning calorimetry , transmission electronmicroscopy , the results have shown that the emulsion polymerization in situ in the presence of nano-particle of calcium carbonate can happen smoothly and successfully and the surface of nano-particle of calcium carbonate have been capsulated by polymer of acrylates, which prevent from the agglomerating of nano-particles of calcium carbonate. Because the copolymer of acrylate has good compatibility with some plastics such as PVC, ABS, AS and so on, so the dispersion of nano-scale calcium carbonate as nanometer size in these plastics can be reached more easily and the effects of nanometer can happen.

通过X射线光电子能谱、热失重分析、动态扫描量热分析、透射电子显微镜等手段，证实在纳米碳酸钙原生粒子存在下，可以进行丙烯酸酯类的原位乳液聚合，乳液聚合顺利，纳米碳酸钙表面被丙烯酸酯类聚合物所包覆，使纳米碳酸钙粒子间的团聚不易发生，同时由于丙烯酸酯类聚合物与PVC、ABS、AS等极性聚合物具有较好的相容性，从而使纳米碳酸钙在聚合物基体中能达到纳米状态分散，从而发挥纳米效应。

All the results indicate that interfacial polymerization between isocyanate and amine to form polyurea wall material is a quick, effective way for capsulation of wax.

实验结果表明由异氰酸酯与胺反应形成聚脲囊壁材料是一种快速、有效的包裹石蜡的方法。

The cationic complexes of transition metals serve as catalytically active species for olefin polymerization. Their structures and properties directly influence the resulting polymers in terms of microstructure and function.

阳离子型金属有机化合物是催化烯烃聚合反应的活性物种，其结构与性质直接影响所得聚合物的微观结构和性能，具有重要的研究价值。

Grafting polymerization of acrylic acid onto flax initiated by ceric salt has been studied.

研究了利用铈盐引发丙烯腈与亚麻接枝共聚反应。

The high oil-absorbing resin made of crosslinked copolymer of wood fibre and cetyl methacrylate was prepared by suspension polymerization method.

采用悬浮聚合法合成了木浆纤维素交联聚合复合高吸油性材料，测定了所制备的复合高吸油性材料吸油性能指标。

Application of organic acid catalysis to the polymerization of pyrroles and pentafluorobenzaldehydes, with the xylene as reaction medium instead of expensive collidine used in the conventional methodology, resulted in a relatively high yield of TPFPPH〓.

本研究利用有机酸如氯乙酸催化吡咯和五氟化苯甲醛聚合，并以二甲苯替代传统方法所用的昂贵溶剂2，4，6-三甲基吡啶，获得了产率较高的TPFPPH〓。

This polyurethane prepolymer was used to copolymerize with vinyl monomer to synthesize the polyurethane-acrylate hybrid emulsion through free-radical emulsion polymerization.

用红外光谱仪、差示量热扫描仪，热重分析、马尔文粒度分析等测试手段，对合成产物进行了结构和性能表征。

The invention uses the method of the fusion and direct polymerization to prepare the carboxyl-terminated lactic acid prepolymer and then copolymerize with the aliphatic polycarbonate; then the reaction is done in the twin-screw extruder to screw out the extension chain and the good polylactic acid copolymer is made.

本发明采用熔融直接缩聚的方法制备出羧基封端的乳酸预聚物，接着再与脂肪族聚碳酸酯二元醇进行共聚，然后再在双螺杆挤出机中进行反应挤出扩链，制备性能良好的聚乳酸共聚物。

In spite of this, the preparation of thiol-end functionalized PMMA was achieved by introducing a short block of polystyrene after the RAFT polymerization of MMA.Third, RAFT technique was applied to design and synthesize some well-defined poymers. Five monomers, lauryl methacrylate,(N,N-dimethylamino)ethyl methacrylate, poly methyl ether methacrylate, 4-(4\'-cyanobiphenyl-4-yloxy) butyl methacrylate and 2-ethyl methacrylate were chosen to RAFT homopolymerization or copolymerizations mediated by cumyl dithiobenzoate.

RAFT方法在具有特定结构聚合物的设计与合成上的应用，在机理研究的基础上，本论文选择五种不同结构的甲基丙烯酸酯类单体：lauryl methacrylate，(N，N-dimethylamino)ethyl methacrylate，polymethyl ether methacrylate，4-(4'-cyanobiphenyl-4-yloxy)butyl methacrylate和2-ethyl methacrylate，用CDB调控RAFT聚合的方法设计合成了一些特定结构的聚合物，详细而深入地研究了它们的均聚、共聚动力学，发现了双硫酯并非在聚合反应初期就全部转化，而是随着反应进行逐步消耗，这与理想的活性聚合体系有很大差别。

The polymerization of 4,4'-biphenyldicarbonitrilecatalyzed by cuprous chloride was studied.

此外，也研究了以锌和几种不同Lewis酸为催化剂时苯甲腈的聚合反应。

The objective is to subjugate and discourage the people, because that allows the elite to continue to rule unopposed.

其目的是压制和打击人民的积极性，因为这可以让实权派继续统治不会沦为反对派。

GOD,this is the second time you vanquished me!

天啊，这是第二次你打败了我！