聚氨酯/丙烯酸酯复合乳液的制备方法及性能研究进展

介绍了近年来国内外聚氨酯/丙烯酸酯复合乳液制备方法：物理共混、种子乳液聚合法、原位聚合法等;评述了聚氨酯的结构、聚丙烯酸酯、引发剂以及制备方法等因素对复合乳液性能的影响;对目前常用的无机纳米粒子和交联等对聚氨酯/丙烯酸酯复合乳液改性方法进行了讨论;展望了该领域的发展趋势。     

浅谈聚氯乙烯的改性研究与应用

介绍了PVC的三种改性研究。物理改性分为弹性体改性PVC和刚性粒子改性PVC;化学改性分为共聚改性、交联改性、接枝改性、氯化改性;原位聚合改性有两种,无机纳米粒子与聚合物基体的原位聚合、核壳结构的有机粒子-无机粒子和聚合物基体原位聚合。并依照市场前景对聚氯乙烯未来的应用做出合理的展望。     

无机-有机纳米复合乳液的原位聚合及其应用

综述了原位乳液聚合法制备无机．有机纳米复合乳液的技术现状及其形成机理，并运用此技术合成了舍无机纳米粒子的压敏胶用无机-有机纳米复合乳液，分析了纳米粒子在制备过程中的分散性能，从纳米粒子引入方式、乳化剂用量、纳米粒子加入量3方面对压敏胶性能进行考查。     

改性纳米SiO_2/聚氨酯复合乳液的研究

通过原位聚合或直接共混合成了由吐温-80改性的纳米SiO2与聚氨酯的复合乳液,并用粒度分析、UV-Vis和DSC等技术进行了表征.结果表明:原位聚合法制得的复合乳液涂膜的性能提升比直接共混明显,加入适量通过吐温-80改性的SiO2纳米粒子可以使制备的水性聚氨酯分散体粒径分布均匀,稳定性好,而且能够同时增加涂膜的拉伸强度、断裂伸长率以及耐候性.     

原位聚合法制备无机纳米粒子/聚合物复合材料的研究进展

介绍了无机纳米粒子/聚合物复合材料的制备方法与原位聚合法制备工艺。重点介绍了原位聚合法制备蒙脱土、纳米SiO2、纳米TiO2和纳米CaCO3等纳米复合材料的研究进展。     

自由基聚合表面改性纳米粒子的研究进展

自由基聚合是工业生产高分子产品的重要技术,也是制备聚合物/无机纳米复合材料时对纳米粒子表面改性的重要手段。综述了自由基聚合表面改性纳米粒子的研究进展。分别对普通自由基聚合和活性聚合表面改性纳米粒子机理和分类进行了归纳和总结。     

聚氯乙烯树脂耐热和增韧改性研究进展

综述了聚氯乙烯（PVC）树脂耐热改性和增韧改性的研究进展。PVC耐热改性方法主要有添加热稳定剂、交联、共混、共聚、氯化及无机纳米粒子改性;增韧改性的主要方法包括弹性体、纳米粒子、聚合物/无机纳米复合材料、纳米级微纤增韧以及原位聚合的方法。最后,提出了PVC耐热和增韧改性的发展方向。     

纳米Si02改性丙烯酸酯乳液的工艺研究

采用水溶性环氧树脂对纳米SiO2进行化学改性，有效改善了纳米SiO2的表面性能。通过原位聚合法和共混法制备纳米SiO2／聚丙烯酸酯复合乳液，发现纳米SiO2的加入明显改善了涂膜的硬度、附着力、拉伸强度和耐候性，原位聚合法制备的复合乳液综合性能优于共混法。     

纳米SiO2改性丙烯酸酯乳液的工艺研究

采用水溶性环氧树脂对纳米S iO2进行化学改性,有效改善了纳米S iO2的表面性能。通过原位聚合法和共混法制备纳米S iO2/聚丙烯酸酯复合乳液,发现纳米S iO2的加入明显改善了涂膜的硬度、附着力、拉伸强度和耐候性,原位聚合法制备的复合乳液综合性能优于共混法。     

无机纳米粒子改性环氧树脂研究进展

综述了采用无机纳米粒子改性环氧树脂的国内外研究进展,改性方法包括原位聚合法、溶液共混法、溶胶-凝胶法、层间插入法等。     

Study on ultrasonic induced encapsulating emulsion polymerization in the presence of nanoparticles

In this paper, the ultrasonic induced encapsulating emulsion polymerization technique was used to prepare polymer/inorganic nanoparticle composites. The main affecting factors in ultrasonic induced encapsulating emulsion polymerization were studied systematically. The experimental results suggested that the pH value, the type of monomers, the type, content, and surface properties of nanoparticles, the type and concentration of surfactant have great influence on the ultrasonic induced encapsulating emulsion polymerization and the obtained latex stability. If selecting cationic emulsifier (such as cetyl trimethylammonium bromide), low water soluble monomer (such as n‐butyl acrylate and styrene), and hydrophobic nano silica, the inorganic nanoparticles could be encapsulated by polymers through ultrasonic irradiation successfully under alkalescent condition, forming a novel polymer/inorganic nanoparticles composite. The mechanism of ultrasonic induced encapsulating emulsion polymerization and the composite latex stabilization are proposed. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 1130–1139, 2001     

聚氨酯-丙烯酸酯复合乳液的研究进展

文中介绍了聚氨酯-丙烯酸酯复合乳液的制备方法,其中包括物理共混,交联共混,互穿网络乳液聚合,核一壳乳液聚合及乳液共聚法。同时从交联改性,有机硅改性,氟改性,纳米改性,环氧树脂改性等5个方面对改性聚氨酯-丙烯酸酯复合乳液的研究进展进行了综述。     

水性涂料用有机无机复合乳液的研究进展

有机无机复合乳液兼具有机物和无机物的优点,因其优异的性能在"环境友好型"的水性涂料领域得到广泛应用。复合乳液已经成为乳液方面的研究热点。论文从静电力吸附、范德华力作用、表面化学键合作用分析了有机无机复合乳液的合成机理;介绍了溶胶—凝胶法、原位分散聚合法等四种各有利弊的制备方法;并特别对其在水性涂料上的应用做了介绍和展望。     

导电聚苯胺／无机复合材料的研究进展

结合导电聚苯胺／无机复合材料的研究进展,综述了聚苯胺与金属、氧化物、碳、无机盐等复合材料的合成方法、特性及应用;同时也概括了原位聚合法、溶胶-凝胶法、电化学聚合法、共混法和自组装法的优缺点。概述了聚苯胺／无机复合材料的发展方向和应用前景。     

Synthesis and characterization of nanosilica/polyacrylate composite latex

The nanosilica/polyacrylate organic–inorganic composite latex was synthesized by in‐situ emulsion polymerization of methyl methacrylate (MMA) and butyl acrylate (BA) in the presence of silica nanoparticles, which were modified by silane coupling agent. The surface properties and dispersibility of silica nanoparticles modification, chemical structure, Zeta potential, diameter distribution of the composite latex prepared, surface roughness, and thermal stability of the hybrid film formed by the composite latex were investigated by fourier transform infrared spectrometer (FTIR), transmission electron microscopy (TEM), Zeta meter, ZetaPlus apparatus (dynamic light scattering method), atomic force microscopy (AFM), and thermogravimetric analysis (TGA), respectively. After modification with silane coupling agent, silane was grafted onto the surface of silica nanoparticles to form the organic layers, which was able to efficiently prevent the silica nanoparticles from aggregating to individually homogeneous disperse in the in‐situ emulsion polymerization system and improve the compatibility of silica nanoparticles with the acrylate monomers. The nanosilica/polyacrylate organic–inorganic composite latex prepared had the properties of silica nanoparticles and pure polyacrylate latex but was not simply a combination. Strong chemical bonding tethered the silica and acrylate chains to form the core/shell structural composite latex. Consequently, the hybrid film formed by nanosilica/polyacrylate composite latex exhibited a smooth surface and better thermal properties than the pure polyacrylate film. POLYM. COMPOS. 27:282–288, 2006. © 2006 Society of Plastics Engineers     

聚苯胺导电复合膜研究进展

将力学性能好的基质与聚苯胺相复合制备聚苯胺导电复合膜是对聚苯胺改性的重要方法之一。介绍了聚苯胺导电复合膜的主要制备方法,包括机械共混法、溶液共混法、电化学合成法、现场乳液聚合法、现场原位聚合法和现场吸附聚合法。综述了聚苯胺导电复合膜在防静电材料、电磁屏蔽材料、敏感元器件、电致变色材料、可充电电池、分子级电路等方面的应用。     

Polymerization of MMA at the surface of inorganic submicron particles

Inorganic submicron particles, such as TiO₂, were modified with titanate coupling agents. The structure and stability of some titanates, both in solution and at the particle surface, were investigated by various methods. The modified titanium dioxide was dispersed in a solution of sodium dodecylsulphate (SDS) in water. The surfactant adsorbs at the now hydrophobic particle surface, thus creating a micellelike structure with an inorganic particle in the centre. In this system an emulsion polymerization of methyl methacrylate was carried out. Product formed at the particle surface is either physically bound by entanglement or chemically bound by covalent bonding to the titanates. In this way a core-shell morphology is obtained with an inorganic core and a polymer shell. The effects of several reaction parameters on the kinetics of the polymerization were studied. The encapsulated TiO₂ particles may offer interesting prospects in those applications where good coupling between polymer matrix and inorganic particles is necessary, such as latex paints and polymer composite materials.     

Preparation of epoxy resin/acrylic composite latexes by miniemulsion polymerization method

Epoxy resin/acrylic composite latexes were prepared by miniemulsion polymerization. Epoxy resins have a functional epoxy group in them and excellent characteristics, such as heat resistance and good adhesion. Acrylic latexes have weather and water resistance. Combining the epoxy resin and the acrylic latex was an attempt to actualize these advantages. The miniemulsion polymerization method was effective in obtaining the composite latex. A less than 500‐nm droplet size for the monomer preemulsion was necessary to obtain the latex in a stable manner. Dimethylaminoethylmethacrylate and methacrylic acid as the reactive functional monomer with an epoxy group were introduced to the latexes. The effect of the polymerization method of these functional groups on the properties of latexes and their films was investigated. The latex prepared by the two‐stage polymerization method had good polymerization stability, storage stability, and solvent resistance. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 128–133, 2001     

有机-无机杂化复合材料膜内层叠制备新方法

叙述了有机-无机杂化复合材料溶胶-凝胶法、原位聚合法、共混法等制备方法。介绍了基于膜内层叠原理的有机-无机杂化复合材料制备新方法,该方法可以避免无机基团分布不均匀、无机基团难可控取向的缺点,将在有机-无机复合材料制备中发挥重要的作用。     

羧基丁苯胶乳的研究与应用进展

介绍了羧基丁苯胶乳的分类以及相关的合成方法,着重介绍了羧基丁苯胶乳的乳液聚合方法,以及国内外的相关研究进展;并对羧基丁苯胶乳的改性进行了相关慨述,简要介绍了羧基丁笨胶乳的应用。