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F元素对热固性含氟聚氨酯微相分离结构的影响 被引量:5

Effect of Fluorine on Micro-phase Structure of Thermosetting Fluorined Polyurethane
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摘要 通过可控阳离子聚合的方法,利用自制的含氟环氧化合物(FO)与四氢呋喃(THF)反应,制备了侧链含氟聚醚多元醇(FPO),进而以FPO作为软段,二苯基甲烷二异氰酸酯(MDI)作为硬段,三乙醇胺(TEA)为交联剂合成了一系列热固性含氟聚氨酯(S-FPU)。利用FTIR、NMR测试手段确定了S-FPU结构;利用XPS测量了S-FPU的表面成分,采用SEM、AFM探究了F元素对S-FPU的体相与表面的微相分离结构的作用。结果表明,F元素的引入降低了含氟聚氨酯本体、表面微相分离结构。 Fluorinated glycol( FPO) featuring F in side chains was synthesized by FO and tetrahydrofuran( THF)via living/controlled cationic polymerization. The micro-phase structure of thermosetting fluorined polyurethane( S-FPU)was synthesized using FPO as soft segments, diphenyl methane diisocyanate( MDI) as hard segments, and triethanolamine( TEA) as chain extender. In characterization,fourier transform infrared spectrometer( FTIR) and nuclear magnetic Resonance( NMR) were used to conform the structure of S-FPU. X-ray photoelectron spectroscopy( XPS) was used to analyze the surface composition of S-FPU. FTIR,nuclear magnetic resonance instrument( SEM) and atomic force microscope( AFM) were adopted to investigate how F made the microphase separation of the bulk and surface for S-FPU. The results showed that because of the introduction of F,it reduced the micro phase separation of inside and surface of fluorined polyurethane.
出处 《广州化工》 CAS 2017年第5期19-22,共4页 GuangZhou Chemical Industry
基金 国家自然科学基金项目(NO:51173107) 上海市教委重点创新项目(NO:15ZZ076)
关键词 热固性含氟聚氨酯 微相分离结构 微观形貌 thermosetting fluorinated polyurethane microphase separation structure microstructure
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