为探究影响超细铜粉分散性的影响因素,以超细铜粉的粒径为指标,应用正交设计法,探究粉体制备工艺中常用的4种处理方式对超细铜粉粒径的影响。结果表明,当采用5%PVP,3%NaH_2PO_2,20%乙醇混合溶液,80℃水浴条件下,1 k W超声处理1 h后,可...为探究影响超细铜粉分散性的影响因素,以超细铜粉的粒径为指标,应用正交设计法,探究粉体制备工艺中常用的4种处理方式对超细铜粉粒径的影响。结果表明,当采用5%PVP,3%NaH_2PO_2,20%乙醇混合溶液,80℃水浴条件下,1 k W超声处理1 h后,可得到分散性较好,平均粒径为0.43μm,基本为球形的超细铜粉。展开更多
The semi-continuous seeded emulsion eopolymerization of vinyl acetate and butyl acrylate was carried out with hydroxyethyl cellulose as a colloid stabilizer. The morphology of the latex particle and the relationship b...The semi-continuous seeded emulsion eopolymerization of vinyl acetate and butyl acrylate was carried out with hydroxyethyl cellulose as a colloid stabilizer. The morphology of the latex particle and the relationship between the reaction time and the average particle diameter and/or the conversion ratio during the polymerization were invstiguted. The experimental results shaw that the morphology of the latex particle possesses the stable sterie construction. In the seeded polymerizution, the average particle diameter of latex decreased while the conversion ratio increased. At the second term of the emulsion copolymerization （the growth stage of particle size）, the latex particle average diameter increased with copolymerization continuously, but the instantaneous conversation ratio was not large, so it was very necessaO to properly prolong the time during the holding temperature stage.展开更多
文摘为探究影响超细铜粉分散性的影响因素,以超细铜粉的粒径为指标,应用正交设计法,探究粉体制备工艺中常用的4种处理方式对超细铜粉粒径的影响。结果表明,当采用5%PVP,3%NaH_2PO_2,20%乙醇混合溶液,80℃水浴条件下,1 k W超声处理1 h后,可得到分散性较好,平均粒径为0.43μm,基本为球形的超细铜粉。
文摘The semi-continuous seeded emulsion eopolymerization of vinyl acetate and butyl acrylate was carried out with hydroxyethyl cellulose as a colloid stabilizer. The morphology of the latex particle and the relationship between the reaction time and the average particle diameter and/or the conversion ratio during the polymerization were invstiguted. The experimental results shaw that the morphology of the latex particle possesses the stable sterie construction. In the seeded polymerizution, the average particle diameter of latex decreased while the conversion ratio increased. At the second term of the emulsion copolymerization （the growth stage of particle size）, the latex particle average diameter increased with copolymerization continuously, but the instantaneous conversation ratio was not large, so it was very necessaO to properly prolong the time during the holding temperature stage.
