查询词典 polymerizing

In the polymerizing water soluble monomers were reaction system , polymerized by using potassium persulfate as initiator, cyclo-hexane as the continuous phase , N,N ′- methylenebisacylamide as the cross-linking agent, and CMC, Span-80,Wool Fat as the disperser.

反相悬浮聚合法因具有反应易于控制、产物呈小颗粒状、后处理容易等优点[4 ] ，是近年来丙烯酸、丙烯酰胺等水溶性单体聚合时较多采用的方法之一。

The invention provides a method for homopolymerizing conjugated dialkene or co-polymerizing conjugated dialkene and monovinyl aromatic hydrocarbon. The method comprises the following steps: the conjugated dialkene is homopolymerized or the conjugated dialkene and the monvinyl aromatic hydrocarbon are co-polymerized randomly. The method is characterized in that at least one alkali metal alkoxide compound expressed by the formula is used as a structure regulator; in the formula, R is linear chain or branched chain alkylidene radical having 1 to 10 carbon atoms; M is alkali metal selected from Li, Na, K, Rb and Cs.

本发明提供了一种使共轭二烯烃均聚或者使共轭二烯烃与单乙烯基芳烃共聚的方法，包括在阴离子聚合条件下使共轭二烯烃进行均聚或者使共轭二烯烃与单乙烯基芳烃进行无规共聚，其特征在于采用至少一种式所示的碱金属醇盐化合物作为结构调节剂，其中R为具有1-10碳原子的直链或支链亚烷基；以及M为选自Li、Na、K、Rb和Cs的碱金属。

The results show that the foamable MAA/MAN copolymers were prepared at 40-60℃ by polymerizing the mixture of 50phr MAA, 50phr MAN, 1-5phr magnesium oxide, 2-8phr butanol and tert-butanol, 0.2-0.3 phr dibenzoyl peroxide and tert-butyl perbenzoate and 0.1-0.2phr DMF. Then the resulting copolymers were expanded at 200-220℃ for 2-3h, subsequently treated at 160℃ for 5-6h, generating PMI foams with excellent mechanical properties and heat-resistance.

研究结果表明：将50份MAA、50份MAN、1~5份氧化镁、2~8份正丁醇、叔丁醇的混合物、0.2~0.3份过氧化二苯甲酰和过氧化苯甲酸叔丁酯和0.1~0.2份的甲酰胺，混合均匀后在40~60℃聚合为可发泡的MAA/MAN共聚物，该共聚物在200~220℃下发泡2~3h，在160℃下热处理5~6h，制得PMI泡沫塑料，其力学性能和耐热性能优异。

Abstract］ Objective To Treating the nano-SiO2 particle by silicon coupling reagent, functionalize the SiO2 by making double bond on its surface. Polymerizing on the surface of nano-SiO2 surface by the method called emulsion polymerization, the nano-SiO2 is covered by polymer to get the PMMA-KH-570-nano-SiO2 complex material. Test the surface structure of the surface of nano-SiO2 by FTIR, and test sort of its mechanical performances.Comparing the treated nano-SiO2 which is directly dispended in the PMMA emulsion with the SiO2 without any treatment, we are trying to find an effective method which can not only increase the dispersion of SiO2, but also improve the mechanical performance of the artificial teeth.

目的 通过硅烷偶联剂KH-570处理SiO2纳米粒子，向其表面引入双键使其功能化，采用乳液聚合的方法在SiO2纳米粒子表面进行接枝聚合，实现高分子对SiO2纳米粒子的表面包覆处理，制得PMMA－KH-570－SiO2纳米复合材料，采用FTIR对SiO2纳米粒子表面结构进行了表征研究，并且测定了它的多种机械性能，与表面处理过的SiO2纳米粒子直接分散至PMMA乳液中制得的复合材料、未添加任何增强物质的空白组进行比较，探索一种能够提高SiO2在基体中的分散性，为义齿复合材料的研究和开发提供理论依据和参考。

The process comprises polymerizing olefins in the presence of a supported indenoindolyl catalyst system and an organoboron or organoaluminum-treated solid.

该方法包括在茚并吲哚基载体催化剂体系和无机硼或无机铝处理的固体存在下聚合烯烃。

In addition, the invention further relates to a catalyzer combination used for polymerizing a conjugated dialkene monomer and the anions of an optional mono-vinyl aromatic hydrocarbon into a polydiene polymer having high and medium vinyl content. The catalyzer combination comprises an organolithium compound used as an anionic polymerization initiator, at least an alkali metal alkoxide compound expressed by the formula as a structure regulator.

此外，本发明还涉及一种用于将共轭二烯烃单体和任选的单乙烯基芳烃阴离子聚合成具有中高乙烯基含量的聚二烯聚合物的催化剂组合物，其包含作为阴离子聚合引发剂的有机锂化合物，和作为结构调节剂的至少一种式所示的碱金属醇盐化合物。

Secondly, according to the construction and characteristic of the N-isopropylacrylamide and the temperature-sensitivity of PNIPA hydrogel, Pdualistic hydrogel was synthesized by microwave low temperature plasma. The effects of the factors on the swelling characteristic of P dualistic hydrogel, such as treatment time and power of plasma, concentrations of crosslinking agent and total monomers, proportion of AMPS, polymerizing temperature etc, was discussed in detail. The three dimensions structure , thermostability , reversional volume , swelling/deswelling kinetics, temperature-sensitivity and pH-sensitivity of the hydrogel were also investigated. The optimal synthesizing technics of P dualistic hydrogel initiated by microwave low temperature plasma was confirmed.

在此基础上，结合NIPA的结构特征和PNIPA的温敏性，用微波低温等离子体引发聚合了P二元智能凝胶，详细探讨了微波低温等离子体处理功率、处理时间、总单体浓度、AMPS单体浓度、交联剂浓度及聚合反应溫度等因素对P二元凝胶溶胀性能的影响；并对其三维交联结构、热稳定性、失水-吸水动力学、温度敏感性、pH敏感性、体积复原性等进行了研究；确定了适合微波低温等离子体引发聚合P二元智能凝胶的最佳工艺。

The particular preparation procedure is as follows: preparing a carbon nanotube with carboxyl by acidulating the carbon nanotube; Preparing the carboxylic carbon nanotube/nylon 66 composite material by polymerizing the carboxylic carbon nanotube and the raw material (such as polybasic acid and polybasic amine) which is used for preparing the nylon 66 through in situ polymerization.

具体步骤为：通过对碳纳米管进行酸化，制备携带羧基的碳纳米管。通过原位聚合法将羧基化碳纳米管与制备尼龙66的原料进行聚合，制备羧基化碳纳米管/尼龙66复合材料。

The main reactions in the polymerizing process was proposed and the structure of copolymer was suggested.

研究提出并证实了聚合过程中的一些主要反应，并由此推断了共聚产物的结构表达式。

Free-radicals may be removed from a polymerizing system by a variety of mechanisms.

聚合体系中的自由基可以通过各种历程清除。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。