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    • 10. 发明申请
    • POLYURETHANEUREA SEGMENTED COPOLYMERS
    • 聚氨酯分离共聚物
    • US20060276613A1
    • 2006-12-07
    • US11382832
    • 2006-05-11
    • Iskender YilgorEmel YilgorDerek KlinedinstGarth Wilkes
    • Iskender YilgorEmel YilgorDerek KlinedinstGarth Wilkes
    • C08G18/48
    • C08G18/4854C08G18/10C08G18/3228
    • Novel segmented polyurethaneurea copolymers were synthesized using a poly(ethylene-butylene)glycol based soft segment. Dynamic mechanical analysis (DMA), small angle X-ray scattering (SAXS) and atomic force microscopy (AFM) established the presence of a microphase-separated structure in which hard microdomains are dispersed throughout a soft segment matrix. Wide angle X-ray scattering (WAXS) and differential scanning calorimetry (DSC) results suggest the materials are amorphous. Samples that are made with HMDI/DY and have hard segment contents in the range of 16-23 wt % surprisingly exhibit near-linear mechanical deformation behavior in excess of 600% elongation. They also show very high levels of recoverability even though their hysteresis is also considerable. The materials are both melt processable and solution processable.
    • 使用聚(乙烯 - 丁烯)乙二醇基软链段合成新的分段聚氨酯脲共聚物。 动态力学分析(DMA),小角度X射线散射(SAXS)和原子力显微镜(AFM)建立了微相分离结构的存在,其中硬微区分散在整个软段基质中。 广角X射线散射(WAXS)和差示扫描量热法(DSC)结果表明材料是无定形的。 用HMDI / DY制成并且具有在16-23重量%范围内的硬链段含量的样品令人惊讶地表现出超过600%伸长率的近似线性的机械变形行为。 即使它们的滞后也是可观的,它们也显示出非常高水平的可恢复性。 材料均可熔融加工,溶液可加工。