甲基丙烯酸甲酯

A new type of difunctional initiator (benzyl dibromide, ethyl dibromoacetate) was proposed in this paper and used to synthesize poly based triblock copolymers such as PSt-PBA-PSt, PMMA-PBA-PMMA.

本论文提出一种新型ATRP双官能团引发剂(如α，α-二溴化苄、α，α-二溴乙酸乙酯)，并用聚合反应速度法、GPC法、核磁分析法进行双官能度的验证，并通过两步聚合合成以聚丙烯酸酯为中间嵌段、苯乙烯或甲基丙烯酸甲酯为两端嵌段的ABA型三嵌段共聚物。

Saturated small molecules such as glycerine, triethanolamine, saturated water-soluble macromolecules including corn starch and polyvinyl alcohol, and vinyl monomer are employed as modifiers for polymeric material surface.

本文首次利用Ce3+的紫外光敏特性，将其作为光催化引发剂，引发饱和小分子如单糖、多元醇，水溶性大分子如淀粉、聚乙烯醇，乙烯类单体如丙烯酸、丙烯酰胺、甲基丙烯酸甲酯等在聚合物基材表面的改性。

Based on the actual project, the author of this paper studies the influence of different admixture on the grouting material, the admixture is made up of water-reducing agent ZQG 、grouting mixture SM-1、SM-2、modifier MMA or AR,and determines the basic mix proportion through experiments; Discusses the construction technology of the grouting materials and examines the quality of grouting material through drop-weight deflectometer;The main results are as follow

本文来源：发表网专业发表文章，论文检测等综合性服务，发表文章请到发表网！发表QQ： 185230016本文以工程应用为目标，研究了减水剂ZQG、压浆掺合料SM-1、SM-2、改性剂甲基丙烯酸甲酯共聚物乳液和丙烯酸树脂等不同外加剂对压浆材料性能的影响，并研究确定了压浆料的配合比；对压浆施工技术进行了讨论，并通过落锤式弯沉仪对压浆质量进行检测。主要研究结果如下

Then, the multidentate amine immobilized on silica gel was used as ligand for CuCl in ATRA of CCl_4 with MMA and methyl trichloroacetate with St repeatly. The conversion and purity of the product were determined through the gas chromatography and ~1H NMR respectively. Finally, the multidentate amine immobilized on silica gel was used as ligand for CuCl in ATRP of St initiated by TCPP and MMA initiated by MMTCB. The number average molecular weights of the polymers were determined through GPC.

此多齿胺改性硅胶配体被分别多次重复用于四氯化碳与甲基丙烯酸甲酯，三氯乙酸甲酯与苯乙烯的ATRA反应中，通过气相色谱测定了原料的转化率随时间的变化，且通过核磁~1H NMR测定了产物的纯度，我们还进一步将此种多齿胺改性硅胶配体用于TCPP引发St的ATRP和MMTCB引发MMA的ATRP反应中，通过GPC测定所得聚合物的分子量。

Reactor Construction: Multitube reactor systems for chemical industry ( all technical heat transfer fluids,particularly mkoltensalt 50 years experience) for production of:phthalic anhydride,maleic anhydride,acrolein,methyl methacrylate,methanol,ethylene oxide and other endothermic and exothermic catalytic gasphase processes.

反应器制造部：列管反应器系统，用于化学工业(所有工业用热交换流体，特别是熔盐传热)中生产苯酐，顺酐，丙烯醛，丙烯酸，甲基丙烯酸甲酯，甲醇，环氧乙烷及其他放热与吸热气相催化生产工艺。

Reactor Construction: Multitube reactor systems for chemical industry ( all technical heat transfer fluids,particularly mkoltensalt 50 years experience) for production of:phthalic anhydride,maleic anhydride,acrolein,methyl methacrylate,methanol,ethylene oxide and other endothermic and exothermic catalytic

简介： 反应器制造部：列管反应器系统，用于化学工业（所有工业用热交换流体，特别是熔盐传热）中生产苯酐，顺酐，丙烯醛，丙烯酸，甲基丙烯酸甲酯，甲醇，环氧乙烷及其他放热与吸热气相催化生产工艺。

Nano-calcium carbonate/polymer composite particles were prepared by soapless emulsion polymerization of methylmethacrylate and Butyl acrylate on the surface of nano-CaCO3 in nano-CaCO3 aqueous suspension.

经甲基丙烯酸甲酯和丙烯酸丁酯双单体聚合包及的纳米碳酸钙形成了核壳结构增韧复合微粒。

The tetrabasic graft copolymer was prepared on chloroprene rubber initiated by benzoyl peroxide,with styrene,methyl methacrylate and acrylic acidas graft monomers by tetrabasic graft copolymerization.

以苯乙烯、甲基丙烯酸甲酯、丙烯酸为接枝单体，以过氧化二苯甲酰为引发剂，在氯丁橡胶上进行接枝共聚，制备出CR/St/MMA/AA四元接枝共聚物。

The poly macromer was copolymerized with butyl acrylate i n benzene to form the graft copolymer.

研究了聚甲基丙烯酸甲酯大单体与丙烯酸丁酯在苯中的共聚。

In the terpolymerization of polyoxyethylene macromer , methyl methacrylate and butyl acrylate the polymerization rate and the effects of various factors on grafting efficiency and molecular weight of the terpolymers were studied.

研究了聚氧乙烯大单体与甲基丙烯酸甲酯及丙烯酸丁酯的三元共聚中大小单体的聚合速率和引发剂用量、大单体分子量及投料比对接枝效率及共聚物分子量的影响。

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。