查询词典 latices

Because of addition of ACR, mobility of copolymerization resin becomes better than that of pure PVC.The synthesis of ACR latices were enlarged, and they were grafted with vinyl chloride, results indicate the copolymerization resin has better modified effect and steady properties .In addition, the main design parameters of a 1m3 autoclave were designed, it made an preparation for enlarging experiment of suspension copolymerization.

对ACR胶乳进行了放大实验，并与氯乙烯进行了接枝和共混，所得树脂改性效果良好，性能稳定，为工业化生产奠定了基础，另外，对1m~3反应釜的主要参数进行了设计，为悬浮接枝的放大实验做准备。

The TTV infection rate of gravidas and parturientes is higher than that of non-pregnant healthy women. TTV can infect newborns through latices, however, there is no vertical maternal-fetal transmission.

孕产妇TTV感染率较高，TTV可能通过乳汁感染新生儿，但母婴间不存在垂直传播关系。

Compared with the conventional emulsion polymerization system,the latices that are of monodispersed latex particles of 0.5m m in diameter,low viscosity and high storage stability are prepared by emulsifier-free emulsion polymerization.

实验结果表明，与常规乳液聚合体系相比，所获得的无皂乳液的乳胶粒大小均一，粒径在0.5m m左右，粘度低，储存稳定；共聚物呈完全无规立构，玻璃化转变温度均在25℃附近，拉伸强度明显增大，耐水性和剥离强度显著提高。

On curing, the -NCH〓OH groups of PNMA film would condense with each other to form a network of PNMA in which the PA molecular long chains were be"tightened"in bundles, or be confined in the meshes of the networks. 2. During the developing process of the low-temperature curable, non-formaldehyde PA latices, the monomers were chosen based on the organic/inorganic ratios, and the co-polymerization reactivity ratios. The effects of crosslinking monomer A and B were also compared.

从物质的有机性/无机性值，以及多元单体发生共聚的条件出发，通过比较交联单体A与B的性能，发现采用交联单体A的胶乳的性能良好，确定了一个由软、硬及交联单体A等多种单体组成的混合体系在阴/非离子组成的复合乳化体系中进行乳液聚合制备所要求的低温无甲醛PA胶乳的配方。

In this paper, the action mode of NMA in the traditional polyacrylate emulsions was studied by extracting the traditional self-curable PA latex film before curing and comparing the properties of two kinds of model latices A and B. Where model A was prepared according to the traditional self-curable PA latex and the model B was a blend of polyacrylates emulsion and an aqueous solution of poly-NMA. The total proportions of the ingredients were adjusted just the same as of model A. The influences of monomers, the dosages of crosslinking monomer A and emulsifier etc.

文中通过构造&共聚&和共混两个胶乳模型，研究了常规&自交联&PA胶乳中N-羟甲基丙烯酰胺的作用模式；分析讨论低温水性PA胶乳的聚合工艺及影响因素；通过分析胶膜的溶失率、吸水率、力学性质和Tg，及用扫描探针显微镜观察薄膜的微观表面形态和粗糙度的测试，研究水性PA胶乳的成膜性能、稳定性及基本性能；测试并分析胶乳作为涂料印花粘合剂和织物涂层剂的使用性能；通过核壳聚合技术对无甲醛胶乳产品进行性能优化。

Compared with the conventionalemulsion polymerization system in the presence of sodium dodecyl benzene sulfonate, the latices prepared by emulsifier-free emulsion polymerization have much more narrow distribution of latex particle sizes (0.2um in diameter), better resistance to electrolytes, pH, freeze-thaw, and better mechanical stability. Not only the tensile strength of the copolymers prepared by this method is obviously increased, but also the water resistance and adhesion capacity are significantly enhanced. On the other hand, the TG results indicate the copolymer has lower thermal stability than conventional copolymer.

实验结果表明，与传统乳液聚合体系相比，所获得的无皂乳液的乳胶粒子大小均一，粒径在0.20um左右；乳液具有优异的稳定性，不受酸碱度、电解质和低温冷冻的影响；附着力和粘接强度明显提高；成膜后显示较高的耐水性；但TG表明乳胶膜热稳定性有所下降。

The EnglishChinese Technical and Scientific Dictionary;the Chemical Industry Products Handbook;Dictionary of Chemistry;Biopolymer;Encyclopedia of Chemical Industry Equipment Design;Mechanical Design Handbook;Chinese Commercial Handbook of Petroleum and Chemical Industry;Guide to the Chinese Coating Industry;Yearbook of Chinese Plastics Industry (2004 );Development Report of Chinese New Materials(2004 );Powder Technology Handbook;Technical Manual of Modern Coal Industry;Applications of Synthetic Resin Latices;the Collected Safe Hygiene Regulation of Chinese Chemical Industry;Encyclopedia of Safety Technology for Dangerous Chemicals.

英汉技术科学词典》，《化工产品手册》《化学辞典》《生物高分子》，《化工设备设计全书》《机械设计手册》(第4版)，《中国石油和化工商务手册》《中国涂料工业指南》《中国塑料工业年鉴》(2004)》，《中国新材料发展报告》(2004)《粉体技术手册》《现代煤化工技术手册》《合成聚合物乳液的应用》，《中国化工安全卫生法规汇编》《危险化学品安全技术全书》。

Two kinds of cross-linked polyacrylate latices with relatively narrow distribution of particle diameters, which are abbreviated to P and P/P, were synthesized by seeded emulsion co-polymerization, respectively. Butyl acrylate and 2-ethylhexy! acrylate were used as comonomers of ACR core, styrene and methyl methacrylate were employed as comonomers of ACR shell, and 1,4-butanediol diacrylate was used as cross-linking agent.

采用丙烯酸丁酯和丙烯酸2-乙基己酯(2-EHA)为核层单体、苯乙烯和甲基丙烯酸甲酯为壳层单体、1，4-丁二醇二丙烯酸酯为交联剂，通过多步种子乳液聚合方法合成了P、P／P两种具有窄粒径分布的共聚丙烯酸酯胶乳。

GPC analysesand particle size results indicated that using PFAMA macro-CTA as the first block wasbetter than using the PBMA RAFT agent with respect to the colloidal stability and thenarrow molecular weight distribution of the F-copolymers latices.

改变合成顺序，首先在本体中合成PFAMA大分子链转移剂，然后在细乳液体系中进行BMA的聚合，凝胶渗透色谱和粒径分析表明：可以得到稳定的细乳液和分子量分布窄的含氟嵌段共聚物PFAMA-b-PBMA。

The photopolymerization led to stable latices and they were obtained with neither coagulation during synthesis nor destabilization over time. It was found that the obtained MMA homopolymers exhibited relatively narrow molecular weight distributions(PDI=1.27—1.36), which was characterized by GPC. The plots of number-average molecular weight vs. conversion and ln([M0]/) vs. time were linear respectively, indicating that the reaction was a controlled/living free radical polymerization.

结果表明，该细乳液体系非常稳定，在整个聚合过程中即没有絮凝物产生，也没有沉淀析出，获得了良好的ln([M0]/)与时间、数均分子量与转化率之间的线性动力学关系，并且在整个聚合反应过程中MMA均聚物的分子量分布比较窄，其多分散性指数较低(PDI=1.27~1.36)，具有明显的活性聚合特征。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。