支化聚合物复鞣填充剂的制备与应用

SYNTHESIS AND APPLICATION OF A NOVEL BRANCHED COPOLYMER LEATHER RETANNING AGENT

摘要:

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。通过正交实验考查了单体配比、引发剂用量、支化单体类型和投料方式对GM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2.5 h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。

Abstract:

Mono-glyceride trimaleate(MG) was prepared by esterification from glycerol and maleic anhydride(MA). MG was employed as allyl branching monomer to copolymerize with acrylic acid and the initiator ammonium persulfate to prepare branched copolymers(BPMGs) by the free radical water emulsion polymerization. The structure of MG and BPMG was characterized by 1H NMR. The influence of monomer ratio, the dosage of initiator, the type of branched monomer and feeding mode on double bond conversion rate of MG was investigated by orthogonal tests experiment. The result shows that, double bond of branched monomer has better conversion rate when branched monomer is MG-30, n(AA):n(MG)is 6:1, the reaction temperature 80 ℃, reaction time is 2.5 h, the mass of initiator ammonium persulfate is 6%(base on tatal mass of reaction meterials). The result of application shows that, the product has better filling quality and physical properties. TEM showed the fiber bundles processed by the branched copolymer was dispersed sufficiently.