- 學位論文
紫外光硬化反應型奈米二氧化矽與含矽烷PU複合材料製備及性質探討
Preparation and Characterization of UV-curable Polysiloxane-containing PU Composites with Reactive Nano-Silica
摘要
本論文研究有機/無機奈米複合聚胺酯材料：二氧化矽奈米顆粒表面經甲基丙烯酸環氧丙酯改質後摻合含矽氧烷紫外光硬化型PU薄膜，探討二氧化矽奈米顆粒改質後的薄膜性質差異。以聚二甲基矽氧烷(KF-6001, Polydimethyl- siloxane, PDMS, 1800 g/mol)為雙醇基，先和過量之IPDI進行反應，形成末端-NCO官能基之PU預聚合物(PDMS-NCO)，接著再與2-HEMA反應，形成末端具雙鍵之UV-PU。最後在與改質後奈米二氧化矽進行紫外光架橋反應成模。 在硬度方面(Shore-A)，未添加奈米二氧化矽聚胺酯薄膜硬度為76 ( kg/m2)，而隨著奈米二氧化矽加入，上升至86 ( kg/m2)；鉛筆硬度也從6B等級上升至5B等級。在接觸角方面，因為奈米二氧化矽表面帶有-OH基，所以接觸角從112°下降至108°。另外在透溼度方面，隨著奈米二氧化矽添加有效從275.05g/(m2．day)下降至38.2 g/(m2．day)，證實具有良好的密封性；而且密著度測試可達5B等級 。
並列摘要
In this article, two series organic -inorganic nano composites were invetigated and compared with each other. Hybridization of UV-curable Polysiloxane-containg PU composite with surface modified nano-silica particles via glycidyl methacrylate (GMA). A PDMS-containing PU oligomer that is obtained from NCO-terminated PU prepolymer with 2-hydroxyethyl methacrylate. The physical properties (such as gel content, water-uptake, enthanol-uprtake, ect.), the thermal properties (thermalgravimentric analysis and dynamic mechanical analysis), the UV/vis spectra transmittance, and scanning electron microscope (SEM) of the orangic-inorangic nanocomposites were evaluated in this article.