中文摘要：

以聚乙烯醇（PVA）、苯乙烯（St）、丙烯酸丁酯（BA）、丙烯酰胺（AM）为基础单体,甲基丙烯酸羟丙酯（HPMA）为功能单体,甲基丙烯酰氧乙基三甲基氯化铵（DMC）为阳离子功能单体,2,3-环氧丙基三甲基氯化铵（GTMAC）为阳离子醚化剂,采用无皂乳液聚合法合成了阳离子醚化改性聚乙烯醇干强剂乳液;通过透射电镜（TEM）和扫描电镜（SEM）分别对干强剂乳液颗粒形态和纸张纤维形态进行表征和检测。结果表明,当HPMA用量为1.5%（对单体总质量而言,下同）时,干强剂乳液Zeta电位最大,体系较稳定;当GTMAC用量为1.5%时,纸张抗张强度的增幅为24.7%,耐折度的增幅为157%;当HPMA用量为1.5%～2.0%时,纸张的抗张强度和耐折度均较高。

英文摘要：

With poly （ vinyl alcohol） （ PVA）, styrene （ St）, ethyl acrylate （ BA）, and acrylamide （ AM ） as main monomers, hydroxy propyl methacrylate （HPMA） as functional monomer, methacroylcholine chloride （DMC） as cationic-functional monomer, and glycidyl-trimethyl- ammonium chloride （GTMAC） as cationic etherifying agent, the dry strength additive was prepared by semi-continuous emulsifier-free emulsion polymerization technique. The morphology of the emulsion particles and the treated paper were characterized by transmission elec- tron microscopy and scanning electron microscopy. The result indicated that the Zeta potential of the emulsion has maximum and the disper- sion system would be more stable when the dosage of DMC was 1.5% on the whole monomers. When the amount of GTMAC was 1.5% , the increase of dry strength was 24.7% and folding endurance was 36 times. When the amount of HPMA was 1.5% - 2.0% on the whole mono- mers, the paper possessed higher dry tensile strength and folding endurance.