我国最大的甲基丙烯酸酯一体化项目落户上海化工区

为提高我国甲基丙烯酸酯生产技术水平，满足相关产业发展的需要，近日，国家发改委核准了德固赛特种化学（上海）有限公司甲基丙烯酸酯一体化项目。     

德固赛上海甲基丙烯酸酯一体化项目获批

2007年4月2日，上海有关方面传出信息，国家发改委日前核准了项目投资总额约为20亿元的德固赛特种化学（上海）有限公司甲基丙烯酸酯一体化项目。此举意味着我国最大甲基丙烯酸酯一体化项目落户上海化工区。     

含端甲基丙烯酸酯基聚硅氧烷光固化复合涂膜的性能研究

将端甲基丙烯酸酯基聚硅氧烷与环氧甲基丙烯酸酯混和经紫外光固化制得复合光固化涂膜,考察了端甲基丙烯酸酯基聚硅氧烷对复合固化膜的热性能、表面能、光泽和横截面微观形貌的影响。研究结果表明:随着端甲基丙烯酸酯基聚硅氧烷含量的增加,复合固化膜的热分解温度提高,玻璃化转变温度略微降低,表面能明显下降,光泽提高,端甲基丙烯酸酯基聚硅氧烷与环氧甲基丙烯酸酯部分相容。     

研发动态

含端甲基丙烯酸酯基聚硅氧烷的光固化涂膜 中科院广州化学研究所的唐春怡等人将含端甲基丙烯酸酯基聚硅氧烷与自制的环氧甲基丙烯酸酯混合,经紫外光固化制成涂膜。考察了含端甲基丙烯酸酯基聚硅氧烷对涂膜热性能、表面能、光泽和横截面微观形貌的影响。     

含氟甲基丙烯酸酯树脂掺杂SiO2复合涂层的制备及其性能

以甲基丙烯酸甲酯(MMA)、甲基丙烯酸十八酯(SMA)、甲基丙烯酸-β-羟乙酯(HEMA)、2-(全氟辛基)乙基甲基丙烯酸酯(FMA)为单体,采用自由基溶液聚合方法合成了含氟甲基丙烯酸酯树脂。将无机纳米二氧化硅(SiO2)粒子掺杂到该树脂中,通过交联固化得到含氟甲基丙烯酸酯树脂/SiO2复合液。利用傅里叶变换红外光谱(FT-IR)、X射线光电子能谱(XPS)与场发射扫描电子显微镜(FESEM)对涂层结构进行了表征。以不锈钢板为底材,讨论了二氧化硅粒子加入量和复合液浓度对复合涂层表面润湿性的影响。结果表明,当二氧化硅占含氟甲基丙烯酸酯树脂质量的20%,所制含氟甲基丙烯酸酯树脂/SiO2复合液的浓度为5%时,在不锈钢基材上制备的复合涂层对水的静态接触角达到126.7°,对煤油的静态接触角为26.8°。     

高韧性丙烯酸酯胶粘剂的研制

通过自由基聚合将甲基丙烯酸酯和氯丁橡胶进行接枝共聚，形成高韧性聚合物，加入补强填料，使丙烯酸酯胶粘剂达到高强度、高韧性，该胶粘剂综合性能优异，其拉伸强度为14HMPa,扯断伸长率为231％     

苯乙烯-丁二烯-苯乙烯-甲基丙烯酸酯嵌段共聚物的合成与表征

用正丁基锂为引发剂,环已烷和四氢呋喃为混合溶剂,以苯乙烯、丁二烯、甲基丙烯酸酯为单体,按阴离子顺序加料方法合成了聚苯乙烯-丁二烯-苯乙烯-甲基丙烯酸酯嵌段共聚物,共聚物经GPC、IR、DSC、TEM等测试方法表征。结果表明,在30 ℃左右、1,1-二苯基乙烯(DPE)戴帽和LiCl配合的条件下,合成了窄分布(MWD<1.3)聚苯乙烯-丁二烯-苯乙烯-甲基丙烯酸酯嵌段共聚物,成功地在SBS中引入了一小段极性链段。     

信息

发改委核准德固赛甲基丙烯酸酯一体化项目国家发改委近日核准了项目总投资约20亿元的德固赛特种化学(上海)有限公司甲基丙烯酸酯一体化项目。此举意味着我国最大甲基丙烯酸酯一体化项目落户上海化工区。发改委表示,该项目是我国最大的甲基丙烯酸酯一体化项目,其建设有利于拓展甲基丙烯酸酯的高端产品市场,促进精细化工和新材料等行业的发展;虽然对国内现有MMA生产企业会产生一定竞争压力,但可促使现有企业加快技术进步、规模化生产、新产品开发的步伐,长远看有利于行业健康发展。中科合臣开发新型聚醚上海中科合臣股份有限公司开发的植物…     

混炼型聚氨酯的新进展

该文介绍了具有优异的机械性能和可制成汽车部件的极低渗透性和透气性的混炼型聚氨酯和可用于湿食品加工的混炼型聚氨酯。三官能甲基丙烯酸酯与二官能甲基丙烯酸酯并用，在用量较高时，可得到性能极好的高硬度聚氨酯胶料，扩展了混炼型聚氨酯的应用范围。     

聚丙烯酸酯乳液的制备及其性能测定

聚丙烯酸酯乳液是一大类容易制备、性能优良、应用广泛且符合环保要求的聚合物乳液。近年来,随着对环保及能源的重视．水性涂料已成为涂料发展的重要方向。乳液涂料是水性涂料中最重要的一种．因对环境友好而逐渐代替溶剂涂料。目前应用最多的是甲基丙烯酸酯类共聚物、醋酸乙烯／甲基丙烯酸酯类共聚物、苯乙烯／甲基丙烯酸酯类共聚物乳液刚．其中．甲基丙烯酸酯类共聚物具有粘结力强、优越的弹性、耐水耐碱性、耐磨性和耐低温性等优点。     

棉纤维溶液的制备及其衍生物的反应活性

本文研究了棉纤维素在惰性有机溶剂 ( DMAC)中的溶解性及其与甲基丙烯酰氯反应后产物的共聚、自聚活性 ,并对产物的结构进行了表征     

Controlled radical polymerization of N,N-dimethylaminoethyl methacrylate using triazolinyl as counter radical

Summary The role of the triazolinyl radical as additive for controlled radical polymerisation is investigated for N,N-dimethylaminoethyl methacrylate (DMAEMA) as polar monomer. A linear increase of the molecular weight with conversion and first-order kinetics are observed proving the controlled behaviour of the polymerization. The end-functionalisation of the obtained polymers was proven by both GPC und UV-spectroscopy. Furthermore, various amphiphilic block copolymers were obtained by chain extension with styrene, methyl methacrylate and ethyl methacrylate. In all cases monomodal GPC curves were obtained indicating an almost quantitative reinitiation.     

化学沉淀法合成甲基丙烯酸锌纳米晶粉体

以甲基丙烯酸、氢氧化钠、氯化锌、氨水等为主要原料,采用化学沉淀法在室温下合成了晶粒尺寸只有几十纳米的甲基丙烯酸锌粉体(ZMA);以FTIR,XRD,NMR,TEM等分析方法对粉体进行了表征,确认了产物的结构及其所属晶系;将合成产物与美国产SR-634甲基丙烯酸锌进行了性能比较,合成产物的平均粒径为40.6 nm,接近于后者的31.4 nm;讨论了氯化锌溶液的滴加速率、ZMA浓度、搅拌速率等因素对合成的甲基丙烯酸锌粉体粒径的影响;得到最优化实验条件为:氯化锌溶液的滴加速率0.5 mL/m in,ZMA浓度4.2 mol/L,搅拌速率100 r/m in,在此条件下,甲基丙烯酸锌收率达80.4%。     

Synthesis of methacrylate copolymers and their effects as pour point depressants for lubricant oil

In this study, polymethacrylate polymers were synthesized by free‐radical polymerization for use as pour point depressants in lubricant oil, and their low‐temperature properties were investigated. Four methacrylate monomers were synthesized by the esterification of methyl methacrylate (MMA) with four kinds of fatty alcohols. The purification step was performed to prepare the pure monomers. Two polymerization experiments were carried out with four kinds of methacrylate monomers obtained previously and MMA. Copolymers, which were made from one kind of monomer and MMA, and terpolymers, which were made from two kinds of monomers and MMA, were prepared. The molecular structures of the synthesized methacrylate monomers and polymethacrylate polymers were verified by ¹H‐NMR, and the molecular weight data were obtained by gel permeation chromatography. The pour points of the base oils containing 0.1 wt % polymethacrylate polymers were measured according to ASTM D 97‐93. The pour points of most base oils containing each polymer decreased compared to that of the pure base oil. Particularly, poly(dodecyl methacrylate‐co‐hexadecyl methacrylate‐co‐methyl methacrylate), made of dodecyl methacrylate, hexadecyl methacrylate, and MMA at a molar ratio of 3.5 : 3.5 : 3, showed the best low‐temperature properties. This terpolymer dropped the pour point of the base oil by as much as 23°C, and its yield was 93.5%. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

Measurement of the unperturbed dimensions of stereoregular poly(methyl methacrylate)

The results of measurements of unperturbed dimensions for a series of stereoregular poly(methyl methacrylates) are reported. The measurements were made by a recently developed method involving a gel permeation chromatograph coupled with an on-line low angle laser light scattering photometer. Measurements were performed in a thermodynamically good solvent, tetrahydrofuran at 25°C. The unperturbed dimensions were obtained by means of viscosity plots. Comparison of the results obtained by this method with those currently available in the literature, as well as with values predicted by statistical calculations, show good agreement. It was determined that a measurable difference occurs in the Mark-Houwink relationship between isotactic and syndiotactic poly(methyl methacrylate); isotactic poly(methyl methacrylate) is 30% more extended than syndiotactic poly(methyl methacrylate) in its unperturbed state; and isotactic poly(methyl methacrylate) exhibits a smaller degree of polymer solvent interaction than the syndiotactic form.     

Synthesis of pure (Co) polymers via supported cobalt (II)-catalyzed controlled/“living” radical polymerization

Cross-linked polyacrylic resin supported-cobalt (II) catalyst was successfully employed in controlled/“living” radical polymerization of various monomers including n-butyl acrylate (BA), ethyl methacrylate (EMA) and styrene (St). Well-defined polymers with predetermined molecular weight and relatively narrow molecular weight distribution were synthesized. After polymerization, the supported cobalt (II) catalyst was easily and effectively removed from the polymerization system by simple centrifugation and very pure polymer products were obtained (Co residue <0.1 ppm). Using the obtained polymers as macroinitiators, polymerization of methyl methacrylate (MMA) and fluorinated methacrylate ether 2-[(perfluorononenyl)oxyl] ethyl methacrylate (FNEMA) were performed, respectively. Well-defined and pure diblock copolymers PBA-b-PMMA, PS-b-PMMA and PS-b-PFNEMA were synthesized.     

Synthesis and properties of dimethacrylates—Derivatives of maleic and fumaric acids

In this work, the synthesis as well as the mechanical and thermal properties of dimethacrylate copolymers are investigated. These copolymers were obtained from glycidyl methacrylate, maleic and/or fumaric acid adducts, methyl methacrylate, and/or styrene. The addition reaction of glycidyl methacrylate as well as maleic and fumaric acids was carried out in the presence of basic catalyst. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

The copolymerization of 2-vinylfuran with methyl methacrylate andn-butyl acrylate

Summary 2-Vinylfuran (2VF) was copolymerized with methyl methacrylate and n-butyl acrylate according to an experimental design scheme. The results were analyzed with a nonlinear error-in-variables method. The values obtained for the reactivity ratios using this approach were much different than reactivity ratios obtained from conventional copolymerization experiments. The r₁ and r₂ values obtained in the present case indicate that 2VF has approximately the same reactivity as methyl methacrylate, but is much more reactive than n-butyl acrylate.     

甲基丙烯酸2-羟乙酯的合成研究

以四甲基氢氧化铵为催化剂 ,由甲基丙烯酸甲酯和乙二醇合成了甲基丙烯酸 2 -羟乙酯。通过正交实验获得了最佳反应条件为 :反应温度 75℃ ,反应时间 4h,酯醇摩尔比 1∶ 2 .0 ,催化剂的用量为 2 .0 ml,产品收率为 91.4%。     

交联聚乙酸乙烯酯胶乳的合成

分别以二乙烯基苯、双甲基丙烯酸乙二醇酯和甲基丙烯酸烯丙基酯（ＡＭＡ）为交联剂，十二烷基硫酸钠（ＳＬＳ）为乳化剂，过硫酸铵为引发剂，合成了交联聚乙酸乙烯酯（ＰＶＡｃ）胶乳。结果表明，ＡＭＡ是乙酸乙烯酯乳液聚合最理想的交联剂，其用量为单体量的２％时，交联度可达到８５％以上。所用ＳＬＳ的浓度为１１．６ｍｍｏｌ／Ｌ时，合成了交联度为８７．４％、粒径为８４．５ｎｍ的交联ＰＶＡｃ胶乳。