支化聚合物皮革复鞣填充剂的制备及应用

以甘油(Gly)和马来酸酐(MA)为原料合成马来酸甘油酯(MG),作为多官能度烯类支化单体与丙烯酸(AA)单体,通过自由基共聚法制备水性支化聚合物皮革复鞣填充剂(BPMG)。通过1HNMR对支化单体和聚合物的结构进行了表征。通过正交实验考察了单体配比、引发剂用量、支化单体类型和投料方式对MG双键转化率的影响。结果表明,MG-30为支化单体,n(AA)∶n(MG)=6∶1,w(过硫酸铵)=6%时,以单体滴加的方式,聚合温度85℃,聚合时间2.5h的条件下,具有较高的双键转化率。应用结果显示支化聚合物可以提供皮革较好的填充性能和力学性能。SEM结果表明,支化聚合物对皮革纤维具有明显的分散作用。

Synthesis and Application for a Novel Branched Copolymer Leather Retanning Agent

Mono-glyceride trimaleate(MG) was prepared by the esterification from glycerol and maleic anhydride(MA).MG was used as an allyl branching monomer to copolymerize with acrylic acid and the initiator ammonium persulfate to prepare the branched copolymers(BPMGs) by the free radical water-solution polymerization.The structure of MG and BPMG was characterized by 1HNMR.The influence of monomer ratio,the dosage of initiator,the type of branched monomer and the feeding mode on the double bond conversion of MG was investigated by the orthogonal test experiment.The result shows that,the double bond of the branched monomer has a better conversion when the branched monomer is MG-30,n(AA):n(MG) is 6:1,the reaction temperature 85 ℃,reaction time 2.5 h,the mass of initiator ammonium persulfate is 6%(base on the tatal mass of reaction meterials).The result of application shows that,the product has a better filling quality and physical properties.SEM showed the fiber bundles processed by the branched copolymer was dispersed sufficiently.