聚四氢呋喃醚二醇脂肪族超支化聚氨酯的合成及表征  

Synthesis and characterization of the PTMG aliphatic hyperbranched polyurethane

作　　者：王学川[1] 伏芋桥[1] 任龙芳[1] 强涛涛[1] 任静[1] 

机构地区：[1]陕西科技大学轻化工助剂化学与技术省部共建教育部重点实验室,陕西西安710021

出　　处：《功能材料》2013年第2期289-293,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51103082);高等学校博士学科点专项科研基金资助项目(20116125120002);陕西科技大学研究生创新基金资助项目(Y0608)

摘　　要：利用聚四氢呋喃醚二醇(PTMG,Mn=2000)和异佛尔酮二异氰酸酯(IPDI)为原料,以二月桂酸二丁基锡(DBTDL)为催化剂,通过逐步聚合反应合成了—NCO封端的聚氨酯预聚体(PPU),通过单因素实验,根据反应过程中异氰酸酯基团和羟值含量的变化规律,优化出了PPU的合成条件:反应温度75℃,反应时间为1.5h,m(DBTDL)=0.007%(以IPDI和PT-MG2000的总质量计)。再通过接枝使PPU与端羟基超支化聚合物(HPAE)共聚反应制备得到一种新型超支化聚氨酯(HBPU)。经过单因素实验分析方法优化出了HBPU的合成条件为反应温度75℃,反应时间4h。分别利用FT-IR和综合热分析对PPU和HBPU的结构以及热稳定性进行了表征。The isocyanate-terminated polyurethane prepolymer （PPU） was synthesized by step-growth polymeri- zation using polytetramethylene ether glycol （PTMG, Mn=2000） with isophorone disocyanate （IPDI） as the monomers, dibutyltin dilaurate （DBTDL） as the catalyst. The appropriate reaction conditions were optimized by single factor experiments as follows. The reaction temperature was 75℃, the reaction time was 1.5h and the quantity of catalyst was equal to 0. 007% of feedstocks. And then the hyperbranched polyurethane （HBPU） was synthesized by graft copolymerization using isocyanate-terminated polyurethane prepolyrner （PPU） and hy- perbranched poly （amide-ester） polyol （HPAE） as the raw materials. The appropriate reaction conditions were optimized by single factor experiments as follows. The reaction temperature was 75℃, the reaction time was 4.5h. The molecular structure of the monomers of PPU and HBPU were characterized by FT-IR. The thermal stability of PPU and HBPU were characterized by thermogravimetry.

关 键 词：超支化聚氨酯 聚四氢呋喃醚二醇 合成 表征 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业] TQ633