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emulsion
    The molecule structure of the emulsifier, especially the oleophylic group, has an important effect on emulsion properties, and the hydrophilic group is also influential. So it is necessary to choose the specific emulsifier for different epoxy resin.
    乳化剂的结构对环氧树脂乳状液的性能影响很大,尤其是亲油基团对环氧树脂的乳化影响最大,当亲油基与被乳化的环氧树脂组分完全相同时乳化效果较好,同时亲水基对环氧树脂的乳化也有影响,对于不同类型的环氧树脂要具体选择合适的乳化剂
    1. Ultrasonically initiated miniemulsion polymerization of styrene in the presence of Fe_3O_4 nanoparticles was successfully employed to prepare polystyrene (PS) /Fe_3O_4 magnetic emulsion and nanocomposite.
    整个过程分为两步:稳定剂辅助下Fe_3O_4在单体中的分散和Fe_3O_4存在下超声辐照引发的细乳液聚合。 研究了稳定剂类型和浓度、乳化剂浓度、助乳化剂浓度、超声功率、Fe_3O_4用量等因素对聚合反应速率,单体转化率及凝胶量的影响。
    1. Emulsion polymerization of MMA (styrene) using waterborne polyurethane dispersion as seeds or emulsifier.
    1.以水性聚氨酯为种子或乳化剂的MMA(St)乳液聚合研究
    It was found that theoptimum conditions for high conversion emulsion polymerizationunder 600C were: composite emulsifier 8.5%, the anionic/nonioncemulsifier quality ratio 1:2, redox initiator 0.2%, (I-f SOi/S~O8 ) molarratio 0.66. The copolymer structure was studied with lnfra-RedSpectrometry and DDV-III-EA Rheovibron Viscoelastorneter.
    应用正交设计和均匀设计实验方法得出:当乳化剂用量为8.5%,阴离子/非离子乳化剂质量比为1:2,引发剂用量为0.2%,还原剂/氧化剂摩尔比为0.66时,采用间歇法聚合工艺得到了高转化率的性能良好的乳液,采用红外光谱和动态力学粘弹谱对乳液共聚物进行了表征。
    The emulsion polymerization of octamethylcyclotetrasiloxane (D4) was studied when under basic conditions and using cationic emulsifiers (1231, 1227) and nonionic emulsifiers (OP-10, TX-10 etc.) as complex emulsify systems.
    论文首先研究了八甲基环四硅氧烷在碱性条件下,以1227、1231阳离子乳化剂和OP-10、TX-10等非离子乳化剂混配作乳化体系的乳液聚合。
    The results showed that under following conditions we can achieve the stable organic silicone polymer emulsions, that is, the emulsion polymerization was reacted under 75癈-80^C, pH 11-12, 6-7 hours and the whole emulsifiers 20%-25% according to the monomer weight.
    实验结果表明,当乳化剂总用量为单体重的20%-25%,反应温度在75℃-80℃,反应pH值为11-12,反应时间6-7小时的条件下可以得到稳定的有机硅聚合物乳液。
    Polyacrylate modified water-borne polyurethane emulsion with hardness of H and water resistance for 24h can be prepared by studying its influence factors on condition that PA/PU ratio is 50 : 50~60 : 40,and polyacrylate includes emulsifying agent of 2.0% and its Tg is 40℃.
    通过对影响丙烯酸改性水性聚氨酯乳液及其涂膜性能的多因素的研究得出:乳化剂含量为2.0%左右,Tg为40℃的聚丙烯酸酯与水性聚氨酯乳液以50:50~60:40机械共混得到的乳液其涂膜的耐水性能到24小时,而且涂膜的硬度达到H。
    The optimum making condition of dimethylsilicone emulsions are that the time of emulsificationis 3.0h, the amount of emulsifier is 10:2.0, the temperature of emulsification is 70C and the optimum making conditions of aminosilicone emulsion are that the time of emulsification is 3.0hr, the amount of emulsifier is 12% weight, the temperature of emulsification is 50C.
    二甲基硅油乳液的最佳制备条件为:乳化时间3.0h,乳化剂含量10:2.0,乳化温度70℃; 氨基硅油乳液的最佳制备条件为:乳化时间3.0h,乳化剂含量12%重量,乳化温度50℃;
    Polymeric surfactant CMC-A9, which has high molecular weight and excellent surface activity, was used together with SDS in ultrasonically irradiated emulsion polymerization of styrene.
    本文采用高分子量和高表面活性的高分子表面活性剂CMC-A9作乳化剂,和十二烷基硫酸钠(SDS)配合使用,通过超声辐照乳液聚合制备了聚苯乙烯纳米胶乳。
    (2) The reaction factors optimized by orthogonal tests are: the emulsion polymerization temperature is 60 ℃, the reaction time is 3 hours, the amount of emulsifier is 8wt%, the hydrophile lipophile balance (HLB) value of emulsifier is 15, the stirring speed is 4000r/min, the dropping speed is 1.1g/min.
    用正交实验确定的最佳聚合反应工艺参数为:水解温度60℃,水解聚合时间3h,乳化剂用量8wt%,复合乳化剂HLB值为15; 搅拌速度为4000r/min,滴加速度为1.1g/min。
    The thesis was focused on the effect of reactive condition on emulsifier-free emulsion polymerization and on the effect of properties of reactive surfactant on emulsion polymerization and properties of emulsion.
    本文以MMA/BA和反应性乳化剂(AGES,AMPS,V5127及R109)为研究对象,研究它们的聚合特性。 首先研究和探讨了聚合条件对无皂乳液聚合的影响,然后对反应性乳化剂的性质对乳液聚合及乳液性质的影响进行了研究。
    We could obtain stable emulsifier-free emulsion when the content of reactive surfactants was from 3% to 8%.
    当反应性乳化剂含量为单体总量的3%~8%时,均可制备性能稳定的无皂乳液。
    The results shows that Span80 and Tween80 is the suitable surfactant, and the stable inverse emulsion can be obtained only when the surfactant is kept more than 8%(wt), volume fraction of water phase to oil phase is less than 0.1 and the NVP momoner is not more than 1.5g.
    结果是:以Span80/tween80为复配乳化剂乳化剂浓度大于8%,水相体积分数小于0.1,单体用量小于1.5g时可以制得稳定的乳液体系;
    The emulsion surface tension tests showed that for a relatively stable emulsion based on liquid paraffin, Span85&Tween60 and sodium alginate solution, the optimal HLB, the content of surfactants were 12.3, 70-110% respectively, and the proper emulsification time was about 60min.
    对乳液表面张力的测试结果表明,制备均一稳定的石蜡/Span85&Tween60/海藻酸钠乳液,最佳的HLB值为12.3,乳化剂含量以70-110%为宜,乳化时间应控制在60min左右。
    Monodisperse polystyrene (PS) particles are synthesized by emulsion polymerization and dispersion polymerization, the influence of doses of emulsifier and monomer, polarity of solvent is discussed.
    应用乳液聚合和分散聚合法合成了单分散聚苯乙烯(PS)微球,分析了乳化剂用量、单体用量或溶剂极性对乳液聚合或分散聚合的影响;
    ②Tests indicate adhesion,rigidity and water resistance of emulsion are better,when the proportion of soft/hard monomer was changed from 1/1 to 1/1.25.③Composite emulsifiers of SDBS and OP-10 have the result of dual stabilization.
    ② 实验表明:软硬单体比例在1/1至1/1.25之间时胶膜附着力、硬度、耐水性较好。 ③ 选用了十二烷基苯磺酸钠(SDBS)和壬基酚聚氧乙烯醚(OP-10)复合乳化剂
    Organosilicon modified acrylic composite emulsion with core-shell structure was prepared by seeded emulsion polymerization. MMA,BA,AA, D4, YDH-570 and YDH-151 were used as the main raw materials, and proper emulsifier, initiator and other assistants were selected.
    以甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、丙烯酸(AA)、八四基环四硅氧烷(D4)、γ-甲基丙烯酰氧丙基三甲氧基硅烷(YDH-570)及乙烯基三乙氧基硅烷(YDH-151)为主要原料,配合适当的乳化剂、引发剂和其它助剂,用种子乳液聚合的方法制备了具有核壳结构的有机硅改性丙烯酸酯乳液(简称硅丙乳液)。
    The soap-free emulsion polymerization owned much advantages such as clearness of the particle and excellent monodispersity, and was widely used in the field of optics, physic, biology and chemical engineering etc.
    无皂乳液聚合即聚合反应过程中无乳化剂或仅含少量乳化剂的乳液聚合,由于其具有颗粒表面洁净,粒子大小均匀,单分散性好的优点,无皂乳液已被广泛应用于光学、医学、生物学、电子、化工等许多领域。
    The polysiloxane emulsion of D_4 and Vi-D4 was prepared using sodium dodecyl benzene sulfonate as an emulsifier and sulfuric acid as a catalyst.
    以十二烷基苯磺酸钠为乳化剂、硫酸为催化剂,进行D4与Vi-D4阳离子开环共聚,得到了聚硅氧烷乳液。
    VC-HEMA copolymer and VC-IBVE-HEMA terpolymer was synthesized by emulsion polymerization, using K_2S_2O_8 (KPS) as initiator and sodium dodecyl sulfonate (SDS) as emulsifier.
    以十二烷基硫酸钠(SDS)为乳化剂,过硫酸钾(KPS)为引发剂,进行VC-HEMA、VC-IBVE-HIEMA乳液共聚。
 

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