功能性丙烯酸酯乳液的制备与应用研究进展

介绍了核-壳乳液聚合、乳液互穿聚合物网络、无皂乳液聚合、微乳液与细乳液聚合等方法与技术在制备功能性丙烯酸酯乳液中的应用。阐述了有机硅、有机氟、聚氨酯、环氧树脂等改性方法用于制备功能性丙烯酸乳液的研究进展。详细介绍了功能性丙烯酸乳液在功能涂料、胶黏剂、皮革涂饰剂、油墨等领域的应用现状,提出了功能性丙烯酸酯乳液的发展趋势：采用新的聚合技术、改性技术制备具有附加值高、性能优异且环境友好的水性功能性乳液是今后丙烯酸酯乳液的主要发展方向。     

Preparation and characterization of soap-free fluorine-containing acrylate latex

The soap-free fluorine-containing acrylate latices were prepared by the pre-emulsification and semicontinuous polymerization method, with perfluorooctylethyl methacrylate (PFEA) as fluorinated acrylate monomer and monophosphoric acid allyloxy nonylphenoxy poly(ethyleneoxy)₍₁₀₎ ether as reactive emulsifier. The structure and property of latex polymers were characterized by laser particle size analyzer, attenuated total reflectance spectra of infrared, X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis. The effects of polymerization conditions on the conversion and polymerization stability were discussed in detail and the optimal polymerization condition was obtained. XPS analysis indicates that the perfluoroalkyl groups have the tendency to enrich at the film–air interface. With the increasing of PFEA amount, the water absorption of the film decreases and the water contact angle of the film increases. At the same time, the thermal stability of the copolymer is greatly enhanced with the increasing of PFEA amount.     

丙烯酸酯乳胶涂料的制备及其在室内设计中的应用

基于互穿网络聚合法合成了丙烯酸酯乳胶涂料乳化剂,选用二烷基磺基琥珀酸盐、聚氧乙烯烷酚基醚、聚二甲基硅氧烷、聚氨酯类增稠剂、乙二醇、2-甲基-4-噻唑啉-3-酮、5-氯-2-甲基-4-异噻唑啉-3-酮等助剂,加入不同的颜料,完成丙烯酸酯乳胶涂料的制备,并分别对其防腐耐霉性、摩擦系数、耐磨性、抗冲击性能进行分析.结果表明:...     

脂肪胺改性漆酚涂料的制备及其性能研究

生漆广泛应用于工业和生活中，但是其致敏性、苛刻的固化成膜条件给生漆的使用带来很大的麻烦。本文利用辛胺、1,8-辛二胺，1,10-癸二胺、十二胺、十六胺对漆酚进行结构改性，采用IR、TG、SEM对产物的结构和形貌进行研究，从表干时间、硬度、耐冲击性、耐化学介质腐蚀性能、凝胶率等方面研究了改性后漆膜的性能。研究结果表明，经过脂肪胺改性后漆酚结构发生改变，几乎无致敏性并且改性漆酚膜的固化时间大大缩短，该系列脂肪胺改性漆膜耐酸碱腐蚀性也有很大提高，可应用在涂料和海洋防腐材料中。     

Preparation and full characterization of cationic latex of styrene-butyl acrylate

Cationic latexes based on styrene and butyl acrylate using cetyl trimethyl ammonium bromide (CTAB) as surfactant were carried out using both batch and semicontinuous emulsion polymerization. Monomer conversion, particle size and its distribution, ζ potential, latex surface tension were determined as function of CTAB levels. Evolutions of these properties were followed, and the results from batch compared to those from semicontinuous process. It was revealed that polymerization rate in batch process was enhanced with CTAB, and the polymerization rate was controlled by addition rate of the preemulsion in semicontinuous process. Molecular adsorption area of CTAB on latex particle surface was calculated, which showed clearly that ζ potential and surface tension in the latex were directly related with surfactant adsorption on the particle surface. The molecular surface adsorption area of CTAB on latex particle could be used to explain the evolution of latex properties such as ζ potential and latex surface tension.     

Colloidal and polymer properties difference of fluorinated acrylate latex prepared with different fluorinated monomers

Fluorinated acrylate latex was prepared by copolymerizing fluorinated monomer, butyl acrylate, and methyl methacrylate, which was initiated by potassium persulfate in the water. The resultant fluorinated latex and its film were characterized with contact angle determinator, dynamic light scattering detector, and differential scanning calorimetry, respectively. Influence of type of fluorinated monomers on colloidal and polymer properties of fluorinated acrylate latex was studied. Results show that the coagulation rate, particle size, contact angle, glass transition temperature, and chemical resistance are increased with the increase of the number of fluorine atom in the fluorinated monomer. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

Preparation and properties of dual-cure polyurethane acrylate

Dual-cure polyurethane acrylates (PUA) with different double bonds content were synthesized by using aliphatic polyisocyanate and 2-hydroxyethyl acrylate (HEA). The molecular structures were identified by Fourier transform infrared (FTIR) spectrum and nuclear magnetic resonance (NMR). Molecular weight (M_w) and glass-transition temperature (T_g) of PUA were measured by gel permeation chromatography and DSC, respectively. The pendulum hardness, pencil hardness, flexibility and abrasion resistance properties of dual-cure system were tested, the results indicated that the pendulum hardness, pencil hardness, and MEK resistance increased, but the flexibility reduced with the double bonds content increased. The mechanical properties of dual-cure system were greatly improved after the heat treatment.     

高光泽度丙烯酸酯乳液的制备及性能

以自制固体碱溶性丙烯酸酯树脂(A-30)为大分子表面活性剂、甲基丙烯酸甲酯(MMA)为硬单体、丙烯酸丁酯(BA)为软单体、丙烯酸(AA)为功能单体和N-羟甲基丙烯酰胺(NMA)为交联单体,采用半连续乳液聚合法合成了性能优良的纸张上光油用水性丙烯酸酯乳液。研究结果表明:当m(MMA)∶m(BA)=40∶56~45∶51、w(NMA)=3%(相对于总单体质量而言)以及w(A-30)=30%~50%(相对于乳液质量而言)时,乳液及其胶膜的综合性能良好,其硬度、附着力、储存稳定性、光泽度、耐磨性、耐水性及耐溶剂性俱佳,并且胶膜经有机溶剂擦拭22次后仍不掉色。     

壳层含硅的丙烯酸酯核壳乳液研究

以半连续滴加法制备壳层含γ-(甲基丙烯酰氧基 ) -丙基三甲氧基硅烷的丙烯酸酯核 -壳乳液。探讨了聚合条件对聚合反应的影响 ,并确定了最佳聚合条件。以红外光谱 (IR)、热分析仪 (TGA、DSC)、动态表面能分析仪、透射电子显微镜 (TEM)表征乳胶的性质及结构。     

Preparation and properties of UV-curable polyurethane acrylate ionomers

Ultraviolet (UV)-curable polyurethane acrylate ionomer (PUAI) prepolymers were synthesized from isophorone diisocyanate (IPDI), poly(methylene ether) glycol (PTMG), 2,2-bis(hydroxymethyl) propionic acid (DMPA), triethylamine (TEA), 2-hydroxy ethyl acrylate (HEA), and dibutyl tin dilaurate (DBT) as a catalyst. UV-curable polyurethane acrylate ionomer aqueous dispersion was formulated from the prepolymers, water (30 wt %), and 1-hydroxycyclohexylhenyl ketone (Irgacure 184) as a photoinitiator. The films of UV-cured polyurethane acrylate ionomer were formed by curing the dispersion using a medium-pressure mercury lamp (80 W/cm; λ max = 365 nm). Gel content decreased with increasing water content in the aqueous dispersion. Effects of DMPA content and molecular weight of PTMG and the degree of neutralization on the physical properties were investigated. It was found that the storage modulus increased with increasing DMPA content. Tensile modulus and strength decreased with increasing the molecular weight of PTMG from 650 to 2000. The glass transition temperature shifted to a higher temperature as the content of DMPA increased. As the degree of neutralization increased, the tensile strength and modulus decreased. However, the elongation at break increased. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 67:2153–2162, 1998     

阻燃型聚丙烯酸酯橡胶的制备和性能

用共聚法和共混法制得了2种阻燃环氧型聚丙烯酸酯橡胶 (EP -ACM ) ,研究了含磷共聚单体及添加无机阻燃剂对EP -ACM阻燃性能和力学性能的影响。结果表明 ,阻燃剂的引入虽可有效地提高胶料的阻燃性 ,但力学性能均有不同程度的下降。     

Preparation and properties of UV-curable polydimethylsiloxane urethane acrylate

A new type of a UV-curable polyurethane acrylate resin based on hydroxyterminated polydimethylsiloxane (PDMS) soft segments with molecular weight 1800 and 2,4-toluene diisocyanate (TDI)/2-hydroxyethyl methacrylate (HEMA) hard segments were synthesized. The reactivity of 2,4-TDI with the hydroxy groups of silanol and HEMA was discussed by means of IR measurements. The characteristic absorption peaks of the —NCO groups of 2,4-TDI in the para- and ortho-position should decline with increasing the reaction time. The measurements of fundamental physical properties of this type of UV-curable materials had been widely studied in addition to the effects of using various reactive diluents and some pigments. This kind of resin with good optical, electrical insulating, and adhesive properties on various matrices, could be improved in chemical properties and reduced in viscosity while promoting the coating processability by mixing with various reactive diluents. The excellent adhesive properties on glass plates can be attributed to the similar structure between the PDMS soft segments and glass which makes the application in the coating industry possible.     

丁苯胶乳水泥的制备及性能研究

针对油田中后期开发面临的固井水泥环受腐蚀、脆性破裂的问题,采用水泥石抗硫化氢腐蚀性分析、试件抗压强度实验,对胶乳改善水泥石的抗腐蚀性进行了研究,实验主要是测定不同胶乳加量下的胶乳水泥性能和水泥石的抗压强度以及相同胶乳加量下在不同温度和不同腐蚀浓度下的胶乳水泥性能和水泥石的抗压强度。实验结果表明,胶乳水泥石比普通水泥石抗腐蚀能力明显提高;随着水泥浆中胶乳加量增加,其失水量降低,水泥石的抗压强度却略有降低,抗折强度略有增高。胶乳的加入使水泥石的性能有了很大的提高,能比较好的解决油田上中深井的抗腐蚀性能。     

丙烯酸酯共聚物乳液与天然乳胶浆粘合剂在胶布鞋中底布的应用

目前,国内胶布鞋生产厂家大多使用汽油浆或乳胶浆刮中底布。使用汽油胶浆刮中底布粘合性好,但制备时间长、耗能大,橡胶和汽油成本高、易失火;使用乳胶浆刮中底布,伸长性能差,在生产中经常出现底布撕裂等质量缺陷。中底布胶浆的生产安全性、质量安全性一直是困扰胶布鞋生产厂家的问题。经过多次试验,丙烯酸酯共聚物乳液和天然乳胶共混浆作为中底布胶浆成功地在生产中得以应用。     

三元丙烯酸酯共聚物乳液研究

合成了无规共聚物———聚(甲基丙烯酸甲酯/丙烯酸乙酯/甲基丙烯酸)[P(MMA/EA/MAA)],并对其结构和性能进行了研究。考察了单体用量、引发剂用量和温度对乳液粒径的影响,结果表明,随着单体和引发剂用量的增加,乳液粒径也随之增加。     

改性丙烯酸酯乳液的研究进展

综述了近年来我国改性丙烯酸酯乳液的研究进展,重点介绍了我国有机硅改性丙烯酸酯乳液、有机氟改性丙烯酸酯乳液、环氧树脂改性丙烯酸酯乳液、纳米SiO_2改性丙烯酸酯乳液、苯乙烯改性丙烯酸酯乳液的最新研究现状,最后指出了我国改性丙烯酸酯乳液的发展方向。     

丙烯酸酯乳液改性研究现状

较详细地介绍了分别用环氧树脂、聚氨酯、有机硅和有机氟对丙烯酸酯乳液进行改性的理论依据及发展现状,并证实改性丙烯酸酯具备普通丙烯酸酯所没有的优异性能。展望了改性丙烯酸酯乳液的发展趋势,为科研工作者更加深入的研究指明了方向。     

Preparation and properties of alkoxysilane/acrylate copolymer microemulsion

A novel alkoxysilane/acrylate copolymer microemulsion was prepared by copolymerization of vinylmethyldiethoxysilane and acrylic monomers using a composite emulsifier system composing of ordinary anionic sodium dodecyl sulphate (SDS), nonionic po1yoxyethylene octylphenol ether (OP-10), and n-butanol as co-surfactant, ammonium persulfate (APS) as initiator. The effects of polymerization processes, reaction conditions and the polymer content on the copolymer microemulsion were investigated, respectively. The structure of the copolymer was characterized by FT-IR spectroscopy. FT-IR spectrum analysis of the latex film indicated that copolymerization occurred. The morphology and size of the microlatex particles had been characterized by TEM and photon correlation spectroscopy (PCS), respectively. Results showed that seeded microemulsion polymerization with a high temperature emulsification process was superior for producing stable copolymer microlatexes. With high alkoxysilane content (30 wt.%), high copolymer content (37.5 wt.%) and low emulsifiers content (5 wt.%), the nanoparticles in the range from 20 nm to 60 nm were obtained.     

新型双组分丙烯酸环氧酯胶粘剂的制备与性能研究

利用丙烯酸环氧酯及环氧树脂E-51为主体,以酸酐为固化剂研制一系列双组分胶粘剂,并对其凝胶化时间、吸水性、拉伸剪切强度、接触角、表面能等各项性能进行了研究.该系列胶粘剂吸水性较低(1.18％～1.78％)、疏水性强、剪切强度最高达30.9 MPa,综合性能良好.