聚丙烯酸酯无皂乳液的性能及其应用

Properties and application of polyacrylate soap free emulsion

针对传统聚丙烯酸酯乳液性能的不足,试验采用甲基丙烯酸甲酯(MMA)为硬单体,丙烯酸丁酯(BA)为软单体,过硫酸钾为引发剂,壬基酚聚氧乙烯醚硫酸铵(DNS-458)为反应型乳化剂,以半连续种子乳液聚合工艺制备了聚丙烯酸酯无皂乳液。探究了引发剂和反应型乳化剂用量对乳液性能的影响,并对制备的产物进行红外光谱图、粒径大小及分布以及Zeta电位的表征与分析,对整理后亚麻织物的TG、SEM、疏水性能以及应用性能进行了测试分析。结果表明,聚丙烯酸酯无皂乳液聚合的优化工艺条件为:引发剂0.7%,反应型乳化剂2.5%,反应温度80℃。制备的乳液粒径较小且分布均匀;整理后亚麻织物对水的接触角达到134.54°,与传统聚丙烯酸酯乳液整理的亚麻织物相比,疏水性能明显提高;亚麻织物的弯曲刚性下降,柔软性能有所改善,同时断裂强度有较明显的提高,可达到786N。

Aiming at the shortcomings of traditional polyacrylate emulsion,taking methyl methacrylate(MMA)as a hard monomer,butyl acrylate(BA)as a soft monomer,potassium persulfate as an initiator and nonylphenol polyoxyethylene ether ammonium sulfate(DNS-458)as a reactive emulsifier,soap-free polyacrylate emulsion by semi-continuous seed emulsion polymerization is prepared.The effects of initi­ator and reactive emulsifier concentrations on emulsion properties are inspected.The infrared spectra,diameter and its distribution of particle and zeta potential of the synthesized emulsion are investigated respectively.The TG.SEM and hydrophobic properties of finished linen fabric are tested.The optimum process of soap-free emulsion polymerization is:initiator 0.7%,reactive emulsifier 2.5%,the reaction temperature 80℃.The particle size of the prepared emulsion is small and the distribution is uniform,and the water contact angle of the linen fabric after finishing is 134.54°.Compared with the traditional polyacrylate emulsion,the hydrophobicity of the treated fabric with the prepared emulsion is improved obviously.Bending rigidity of linen fabric decreases and the softness increases.The breaking strength of linen fabrics has been improved significantly up to 786N.