查询词典 polymerization

Herein the latest developments of olefin aqueous polymerization which are mainly promoted by late- transition metal catalysts are reviewed including ethylene,α-olefins, cyclo-olefins and dienes polymerization, along with ROMP of cyclo-olefins and CO/olefins copolymerization.

本文综述了后过渡金属催化剂水相催化烯烃配位聚合的一些新进展，内容包括烯、α-烯烃、环烯烃、二烯烃的聚合反应和环烯烃的开环聚合反应以及CO/烯烃的共聚反应等方面。

The controlling factor of the polymerization rate is varied from the diffusion rate of monomers to the addition rate. In this case, the variation of polymerization rate is very small, and is close to first-order reaction.

控制聚合速率的主要因素则从单体的扩散速率过渡到单体的滴加速率，而聚合速率几乎不随时间变化、接近一级状态。

The invention relates to a surface chemistry modified latex which can be obtained by carrying out radical polymerization in emulsion in the presence of at least one ethylenically unsaturated monomer or at least one polymer having ethylinically unsaturated residual bonds, at least one radical polymerization, at least one single, double or triple block polymer which is soluble or dispersible in water, comprising an active group at the end thereof, capable of forming a radical, and chosen from dithioesters, xanthates, thioether-thiones and dithiocarbamates.

本发明涉及具有改良表面化学性质的胶乳，它可以通过在以下物质的存在下进行自由基乳液聚合来获得：至少一种烯属不饱和单体或至少一种含残留烯属不饱和键的聚合物，至少一种自由基聚合引发剂，至少一种水溶性和/或水可分散的单嵌段、二嵌段或三嵌段聚合物，在其端部包括选自二硫酯，硫醚-硫酮，二硫代氨基甲酸酯和黄原酸酯中的能够形成自由基的活性基团。

The morphology of virions seems to not be change after incubated with the paeonol by electron microscope. The regained infectivity of TMV recovered by dialysis from incubation with paeonol in vitro showed that the paeonol have not direct viricidal effect. The paeonol did not reduce infectivity when applied before TMV inoculation. The paeonol in low concentration can restrain the polymerization of TMV coat protein in vitro. The paeonol did not reduced infectivity of TMV-RNA in vitro. It is proposed that the paeonol inhibited TMV by binding with TMV coat protein to interfere with recognition of a host receptor essential for infection or by interfering TMV-CP polymerization in plants. The anti-TMV activity of low molecular weight chemicals extracted from Polygonum cuspidatum were determined.

丹皮酚与TMV混合，电镜下观察对粒体形态没有影响；TMV与丹皮酚混和后透析可恢复侵染力，表明丹皮酚对病毒粒体并没有直接毒害作用；预先用丹皮酚喷施叶面不影响病毒的侵染，表明丹皮酚未干扰TMV对叶片侵染位点的识别；丹皮酚在低浓度时可阻碍TMV-CP的体外聚合，对TMV-RNA并无体外抑制侵染作用，据此推测丹皮酚对TMV的抑制作用可能主要通过其与TMV-CP结合影响病毒粒体对叶片表面侵染位点的识别，或影响体内TMV粒体的脱衣壳或TMV-CP亚基的体内聚合。

This process is a gree synthesise Rite.The effects of discharge time, discharge power, concentration of MA, post- polymerization temperature and post- polymerization time on the conversion of MA and properties of PMA were studied.

考察了放电时间、放电功率、单体浓度、后聚合温度及后聚合时间等对等离子体引发聚合制备PMA的单体转化率及产物性能的影响。

The humidity resistance and the sensitivity to chemical warfare agents simulants of the tuned films were also investigated.Self-assembled LBL polyaniline films were prepared from aniline monomers by in situ polymerization and the mechanism of film formation was discussed. It was proposed that the self-assembly of polyaniline occurred through the quick absorption of aniline monomer cations or aniline monomer cation radicals on the glass surfaces by electrostatic attractions to form homogeneous polymerization centers, then increased gradually by the way of upright to the glass supports for extensity, leading to the polyaniline chain growth. The polyaniline was doped under acidic condition to absorb anionic polyelectrolyte, such as sodium polystyrene sulfonate based on the electrostatic force, or to adsorb polymer based on hydrogen-bonding interactions, for example Polyvinyl Alcohol, and then recycled to fabricate_n or_n self-assembled multilayer films.

跟踪了原位聚合的具有纳米结构的聚苯胺多层自组装膜的成膜过程，提出了该自组装膜的成膜机理：聚合反应初始阶段的苯胺阳离子或苯胺阳离子自由基通过静电作用快速吸附到带负电荷的基片表面，形成均匀的聚合中心，然后以垂直于基片的方式进行链增长生成PANI；PANI在酸性条件下经现场掺杂后带正电荷，再通过静电作用吸附带负电荷的聚电解质如聚苯乙烯磺酸钠，或通过氢键作用吸附聚合物如聚乙烯醇，这样循环LBL-SA即得到_n或_n等原位聚合聚苯胺自组装膜。

This article had carried on the transformation to the ramee retting wastewater processing project which mainly used the method of "the transformation-biological chemistry" for the polymerization iron sulfate or the polymerization aluminum chloride.

对苎麻脱胶废水处理工程进行了改造，采用了&物化－生物化&组合工艺和企业锅炉烟气对苎麻脱胶废水进行中和处理，以废治废；采用硫酸亚铁、聚合硫酸铁或聚合氯化铝为絮凝脱色剂，去除大量的非溶解性污染物。

The on-line reaction kinetics of RIM polymerization of PU/VER SINs has been monitored by using a mini-RIM machine interfaced with FTIR During the course of synthesis, the two pairs of reactants interfere with each other in PU/VERA SIN system, although they follow different polymerization mechanisms and the possibility of inter-component chemical binding may be neglected (secondary hydroxyl groups of VERA capped).

在对机械搅拌混合物料PU／VER SIN体系进行了DSC、FTIR聚合反应动力学研究的基础上，本文首次利用第一台国产微型RIM机成功地实现了RIM PU/VER SIN体系合成时的FTIR在线聚合反应动力学测量。虽然PU、VERA网络的生成遵循不同的聚合反应机理（逐步缩聚反应、自由基共聚反应），并且两网络间的化学键合作用可以忽略（VERA为封闭仲羟基的VER），但合成PU/VERA SIN时两组份的相互作用不容忽视，两网络的生成速率均低于同样温度下纯网络的生成速率。

The pilot-trial technological recipe and process character of SB polymerization was emphatically analyzed. On the base of the considering of the industrialization of normal SB later product, the constant unit volume power was mainly selected as a rule to scale up the polymerization reactor during the industrialization of SB latex as cement additive.

着重分析了水泥专用丁苯胶乳的中试工艺配方和流程特点，在结合常规丁苯聚合工业放大规律的基础上，提出了采用以相同单位体积功为主的放大准则对水泥专用丁苯胶乳的聚合过程进行了工程放大试验，着重考察了搅拌转速、搅拌桨形式和内冷构件等因素对聚合过程稳定性和成品胶乳性能的影响，并分析讨论了20m3工业聚合釜的传热可行性问题。

In this paper, graft polymerization of acrylic acid onto maize starch using ammonium persulfate-sodium bisulfate as initiator is studied. The important reaction conditions of graft polymerization are investigated.

该文研究了以过硫酸铵亚硫酸氢钠为引发剂的玉米淀粉与丙烯酸的接枝共聚反应，并对重要的反应条件进行了研究。

It seems likely that Kraft will return with a better offer.

看起来卡夫要重新考虑一个更好的出价了。

But he'd rather burn off my feelers and watch me squirm.

可他却放任那个家伙对我为所欲为！