端羟基超支化聚合物的合成及对铬鞣革复鞣性能的影响

Synthesis of Hydroxyl-terminated Hyperbranched Polymer and Its Influences to Retannage Properties of Chrome Tanned Leather

以二乙醇胺（DEA）和丙烯酸甲酯（MA）为原料，通过Michael加成反应制得AB2型单体；由“一步法”使单体与核（三羟甲基丙烷，TMP），在对甲苯磺酸（P—TSA）催化下，通过酯交换反应制得一种端羟基超支化聚（胺-酯）（HPAE）。经单因素实验筛选出了HPAE的最优合成条件：反应温度120℃、ω（P-TSA）=2％（相对于单体与核的总质量）、反应时间4～5h。用IR、GPC等手段对聚合物的分子结构进行了表征，并将HPAE应用于绵羊皮蓝湿革的复鞣。结果表明，HPAE—Ⅰ（第一代端羟基超支化聚合物）对皮样漂白作用明显，白度值增幅为19．8％；HPAE-Ⅲ（第三代端羟基超支化聚合物）可以显著提高铬鞣革撕裂强度，增幅为23．3％，抗张强度增幅为11．3％。

The divergent synthesis of a series of hyperbranched poly （amine-ester） based on trimethylolpropane（ as a core molecule） and methyl 3-（ N, N-diethylolamino）propionate （as a AB2 monomer） synthesized via Michael addition of methyl acrylate and diethanolamine, proceeded in onestep procedure in the melt using P - TSA as catalyst. The appropriate reaction conditions were optimized ：catalyst dosage 2% （based on total mass of monomer and core）, reaction time 4 -5 h and temperature 120 ℃. The polymer was characterized by IR and GPC. It was applied to retan wet blue leather of sheepskin. The results indicate that： HPAE-Ⅰ （ the first generation of polymer） has good bleaching effect on the sample,increasing the white degree by 19. 8% ;HPAE-Ⅲ （the third generation of polymer） can improve the tearing resistance of chrome tanned leather obviously （increased by 23.3% ）,and had some help to tensile strength（increased by 11.3% ） at the same time.