摘要
以—NCO封端聚氨酯(PPU)和端羟基超支化聚合物(HPAE)为原料,在二月桂酸二丁基锡(DBTDL)的催化作用下,通过接枝共聚反应合成了一种新型超支化聚氨酯(HBPU)皮革涂饰剂。通过单因素试验分析方法优化出了HBPU合成条件:反应温度80℃,w(DBTDL)=0.5%(以IPDI和PEG2000的总质量计),反应时间为4.5h。利用FTIR、13C-NMR等方法,对原料和HBPU的分子结构进行了表征。通过综合热分析测试了HBPU的热分解温度Tg为263.2℃,分析了HBPU的耐溶剂性并探讨了其在皮革涂饰中的应用性能。
The hyperbranched polyurethane was synthesized by graft copolymerization using isocyanate - terminated polyurethane prepolymer （PPU） with hyperbranched poly（ amide -ester） polyol （HPAE） as the raw materials, and dib utyltin dilaurate （DBTDL） as the catalyst. The appropriate reaction conditions were optimized by single factor experiment for the PPU： the reaction temperature was 80℃, the quantity of catalyst is equal to 0. 5 % of feedstocks, and the reaction time is 4. 5 h. The molecular structure of the raw materials and HBPU were characterized and analyzed by FTIR, ^13C - NMR. and the thermal properties of HBPU was characterized and analyzed by TGA. Thermal decomposition temperature is 262. 2℃. The solvent resistance of HBPU were analyzed and its application in leather finishing was discussed.
出处
《中国皮革》
CAS
北大核心
2010年第3期27-31,共5页
China Leather
基金
国家自然基金项目(20676075)
博士点基金项目(20060708002)
陕西科技大学研究生创新基金的资助
关键词
超支化聚氨酯
涂饰剂
合成
表征
hyperbranched polyurethane
finishing agents
synthesis
characterization
