浸润性可控铁电，铁磁涂层的制备及其表面浸润性的研究

介绍了一种操作简单且广泛适应于多种材料的涂层制备工艺，在制备过程中，以粒度精细，分散度好的铁电，铁磁微粉和挥发平缓，且在450℃前挥发完全的聚丙烯酸酯不干胶为原料，经过简单的涂抹工艺后得到涂层。在退火过程中控制升温速率，可得到平整的高质量涂层表面。通过控制涂层退火温度可以得到浸润性由超疏水到超亲水变化的涂层表面，扫描电镜图像显示涂层表面呈现阶层结构，表面晶粒和孔洞尺寸随退火温度升高而增大。     

聚丙烯酸钠高吸水性树脂的研究

采用反相悬浮聚合法合成聚丙烯酸钠高吸水性树脂。讨论了水油比、分散剂种类、交联剂用量、引发剂用量、反应温度、中和度及反应时间对树脂吸水率的影响，并研究了其保水率。在最佳条件下合成的聚丙烯酸钠树脂吸水率达606％，在80℃干燥4h保水率仍达83％，该吸水性树脂还可回收再利用。     

Synthesis and characterization of fluoropolymer modified polyacrylate in emulsion polymerization

A novel method to produce fluorine‐containing polyacrylate emulsion is presented. It is prepared by the copolymerization of n‐methyl methacrylate, n‐styrene, n‐butyl acrylate, and α‐methacrylic acid in the presence of swollen particles of PTFE. The structure and properties of the polymers are characterized by GPC, PSD, SEM, and XPS. The number‐average molar mass (Mn) 51,332, and the polydispersity 5.8688 are obtained. The mean diameter of latex particles is 300nm. Scanning electron microscopy reveals that particles of the emulsion are well dispersed. Meanwhile, the F_1S content of the surface on the latex membrane is 8.99%. It is shown that the method of mixing micron and nanometer‐sized particles should be made the next step of research. It is also proved that inertia polymers can be used in emulsion property modification. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 558–562, 2006     

核壳型聚丙烯酸酯复合乳液的性能研究

采用半连续种子乳液聚合法合成了"硬核软壳"核壳型复合乳液,研究了聚合工艺、乳化剂复配类型对乳液性能、乳胶粒粒径及粒径分布的影响。结果表明:种子聚合采用间歇法、核层及壳层聚合都采用预乳化工艺,乳液聚合稳定且乳胶粒粒径分布窄;乳化剂壬基酚聚氧乙烯醚-2-磺酸基琥珀酸单酯二钠盐(MS-1)分别与十二烷基硫酸钠(SDS)、十二烷基苯磺酸钠(SDBS)以及脂肪醇聚氧乙烯醚(OS)复配用于乳液聚合,当m(MS-1):m(SDS)为6:4时所合成乳液的乳胶粒粒径小且分布窄、聚合稳定性好。最后采用红外和透射电镜分别对聚合物分子链结构和乳胶粒形貌进行了表征。     

丙烯酸酯类黏合剂无皂乳液聚合

以甲基丙烯酸甲酯(MMA)为硬单体,丙烯酸丁酯(BA)为软单体,甲基丙烯酸(MAA)为功能单体,聚乙烯醇(PVA)为胶体保护剂,丙烯酸羟乙酯(HEA)为交联单体,采用无皂乳液聚合法合成了聚丙烯酸酯类黏合剂。优化的聚合工艺为:75～78℃聚合3 h,80℃保温1 h,胶体保护剂PVA 1%,交联单体HEA 3.0%,功能单体MAA 10%。合成的丙烯酸酯黏合剂含固量20%～22%,pH值稳定范围为6～14,应用性能较好。     

聚丙烯酸钠缓释作用及其在砂土中吸液性能的探讨

探讨了砂土和溶液中水量、时间、pH值、温度、肥料对聚丙烯酸钠吸液倍率的影响以及聚丙烯酸钠对肥料的缓释作用。实验表明,在砂土中,聚丙烯酸钠的吸液倍率比溶液中降低105g;吸液饱和时间比溶液中延长60min;pH值(4～10),温度(20℃～80℃)对聚丙烯酸钠吸液倍率影响不大;非电解质肥料对吸液倍率影响很小,电解质肥料对吸液倍率影响较大。经过96小时,吸收1.0%KCl和1.0%尿素溶液的聚丙烯酸钠对钾和氮素累积释放率分别不到25.0%和80.0%,说明聚丙烯酸钠对尿素和KCl均有一定的缓释作用。     

铬鞣皮纤维静电植绒技术

简要阐述了铬鞣皮纤维和纺织产品静电植绒技术的发展情况和铬鞣皮纤维静电植绒技术实例。     

Poly(vinyl acetate)/polyacrylate semi‐interpenetrating polymer networks,part 1: Synthesis and polymerization kinetics

Bulk photopolymerization was used to synthesize a series of semi‐interpenetrating polymer network (s‐IPN) based on linear poly(vinyl acetate) and crosslinked N‐butyl acrylate/1,6‐hexandiol diacrylate (HDDA) copolymer. Different formulations were used by varying the monoacrylate/diacrylate molar ratio and the linear polymer concentration. The polymerization kinetics was studied as a function of the s‐IPN composition by FTIR spectroscopy. It was observed that the reaction rate increases by increasing the linear polymer amount. This effect is much more pronounced in the reaction mixtures with a higher diacrylate concentration, playing a key role the restricted mobility of the macroradicals involved in the bimolecular termination. The maximum conversion increases regularly with linear polymer concentration in the blend and resulted to be very high, ranging from 95 to 98%. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

Preparation of high surface area CaCO3 by reacting CO2 with aqueous suspensions of Ca(OH)2: Effect of the addition of sodium polyacrylate

High surface area CaCO₃ was produced through the reaction between CO₂ and an aqueous suspension of Ca(OH)₂ with the addition of an additive, sodium polyacrylate. The surface area of CaCO₃ prepared was affected markedly by the amount of additive and the solution pH when adding the additive. The CaCO₃ with the highest surface area (87.7 ± 1.3 m²/g) was obtained under the conditions that the initial Ca(OH)₂ concentration was 2.4 wt.%, the amount of sodium polyacrylate added was 0.2 wt.%, and the solution pH at which the additive was added was in the range of 11.4-11.1. The high surface area CaCO₃ also had a high pore volume. The CaCO₃ was highly reactive toward SO₂, and a conversion of 0.95 was achieved when it was sulfated at 950 °C and 4000 ppm SO₂ in air for 1 min. Prior calcination reduced the reactivity of this high surface area CaCO₃.     

聚丙烯酸酯改性聚氨酯乳液的研究进展

综述了聚丙烯酸酯改性聚氨酯乳液的物理掺混法、嵌段共聚法、核壳共聚法、接枝共聚法和互穿聚合物网络共聚法的研究进展,并且结合实验对各种改性方法的优、缺点进行了讨论.