马来酸单酰胺－甲基丙烯酸酯－丙烯酸共聚物复鞣加脂剂的制备与性能

Preparation and Properties of Maleic acid monoamide--Methyl acrylate--Acrylic acid Copolymer as Retanning Fatliquor Agent

摘要:

以N-单马来酸十八烷基酰胺（NSA-18）和甲基丙烯酸十八烷基酯（MAO）为亲油单体、丙烯酸（AA）为亲水单体、过硫酸铵（APS)为引发剂，采用活泼单体滴加法制备了两亲结构共聚物（PNMA）复鞣加脂剂。通过傅里叶变换红外光谱（FT-IR）和示差扫描量热分析（DSC）对PNMA的结构进行了表征。通过单因素实验考察了影响PNMA制备的各项因素。实验结果表明，当n（NSA-18）:n（MAO）=3:2、n（亲油单体）:n（亲水单体）=1:3.5、w（APS）=4.5%(基于单体总量）、反应温度为88℃、活泼单体滴加时间为2h时合成的PNMA复鞣加脂剂具有较好的填充性能和一定的柔软、防水性能，质量分数为1%的水乳液的透光率为42.7%（400nm,25℃），复鞣加脂后革样增厚率为29.6%，静态吸水率为43.6%。

Abstract:

Retanning fatliquor agent amphiphilic copolymer(PNMA)was synthesized from hydrophobic monomers N-octadecyl maleic amide(NSA-18) and octadecyl methacrylate(MAO), hydrophilic monomer acrylic acid (AA), with ammonium persulfate(APS) as initiator by free radical water emulsion copolymerization during which active monomer was added dropwise.The structure of PNMA was characterized by means of FT-IR and DSC. Effect of reaction conditions on properties of PNMA were investigated by single factor experiments. under optimal conditions: mole ratio of NSA-18 to MAO3:2, mole ratio of hydrophobic monomer to hydrophilic monomers 1:3.5, mass fraction of ammonium persulfate 4.5%(base on total mass of monomer), reaction temperature 88℃, dropping time of active monomer 2h, the retanning fatliquor agent showed good thickening rate,softness and `waterproofness. Light transmittance of 1% (mass fraction) PNMA aqueous emulsion obtained was 42.7%, the thickening rate was 29.6%, and static water absorption was appropriately 43.6%.