核壳型结构苯丙乳液纸张湿强剂的合成及应用

根据苯丙乳液湿强剂中的环氧基团与纸张纤维的反应机理,合成了聚苯乙烯-甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯(PSMG)、聚苯乙烯-甲基丙烯酸丁酯-甲基丙烯酸缩水甘油酯(PSBG)纸张湿强剂,其含有的环氧基团可与纤维形成共价键结合。通过基础单体、引发剂及功能单体的用量对纸张物理性能的影响来优化聚合工艺。研究表明:TEM分析证明已成功合成具有核壳型结构的乳液粒子;以St与MBA为基础单体的苯丙乳液湿强剂对纸张各项物理性能的增强效果较优;引发剂过硫酸钾(KPS)用量为0.15g(0.22%)时纸张的各项物理性能达到最高值;功能单体甲基丙烯酸缩水甘油酯(GMA)相对于总单体的质量分数为20%时能赋予纸张较高的湿强度。

Synthesis and Application of Styrene-Acrylic Latex with Core-Shell Structure as Wet-Strength Agent

According to the reaction mechanism of epoxide groups which are in the chain of styrene-acrylic latex with paper fibers,the PSMG and PSBG were successfully prepared.And it formed covalent bond between epoxide groups and fibers.e condition of polymerization can be optimized by studying on basic monomers,emulsifiers and functional monomer,whose dosage affect the paper properties.e results showed that TEM characterization proves the formation of the emulsion particles,which were with coreshell structure.e paper properties are better with adding in styrene-acrylic latex,which are prepared with styrene (St) and butyl methacrylate (MBA) as basic monomers.When the amount of KPS was 0.15 g (about 0.22% of weight of whole monomers),the paper properties were in the maximum value.In order to obtain relative higher wet strength,the dosage of glycidyl methacrylate (GMA) was 20% based on whole monomers.