臺灣博碩士論文加值系統

　　本實驗採用濕氣硬化型PU和煤焦瀝青的優點，製成Pitch/PU摻混防水材。實驗中，改變三種不同NCO/OH比例(1.5，1.8及2.0)和四種不同 Pitch/PU 百分比 (10, 20, 30及40)，並分別添加三種不同偶合劑 (A-187, A-189 及 A-1100)，然後加入可塑劑DOP，溶劑甲苯，改善其粘度及加工性，研究在多少配比下可得到最佳物性。結果發現，在NCO/OK為1.8，Diol/Triol為15的配比，添加0．1%噁口坐烷除濕劑 (oxazolinide moisture scavenger) 所合成PU prepolymer 的情況下 ，加入瀝青和偶合劑 ，在Pitch/PU的比例為30%左右，使用偶合劑A-187為1%DOP為80%，甲苯為15%時可得到最佳物性。其後在耐水性、化學藥品、紫外線測試後，其強度、伸度保持率都能維持不錯的值，而在耐候性測試中，因長時間受到模擬的日光和雨水循環作用使得試片變得脆且硬，且表面會失去原有的光澤，但在機械性質測試中，雖然試片的伸長率因為試片變脆且硬而降低其伸長率，但其機械強度仍有不錯的值。因此將此 Pitch/PU摻混防水材塗佈於混凝土上，可完全密封其細孔，使結構不透水及空氣，亦即不受環境條件改變之影響，對於混凝土之龜裂有抑制作用，而增加其耐久性。

　　This study combined the advantages of moisture-cured PU and coal tar pitch to manufacture the water-resis-tance membrane. The experiment changed three difference NCO/OH ratio (1.5, 1.8, 2.0), three difference Diol/Triol (10, 15, 20), four difference Pitch/PU ratio (10, 20, 30, 40)and adds to three difference silane (A-187, A-189, A-1100), then adds to plasticizer (DOP) and slovent (toluene) modify their viscosity and processly. And to study the mix ratio to have the best physical propetry, The result shows found that at the NCO/OH ratio at 1.8, the Diol/Triol ratio at 15, adds to 0.1% oxazolidin moisture scavenger to synthesize the PU preppolymer, then biends coal tar pitch and adds to silane, at the Pitch/PU ratio at about 30%, adds to silane (A187), at 1%, the DOP at 80% and toluene at 15% can reach the best physical property. After the test of the watr-proof, the ultraviolet rays, the chemical medicine, their tensile strength and ultimate elongation can maintarn good number. And the test of the climate-proof, because at long time incur the effect of sunlight and rain in a cycle, the sample become brittle and stiff and their surface lose original glossy. The test of mechanical property can find to reduce the elongation of sample, because the sample become brittle and stiff. Their mechanical property can also maintain good number.
　　When th Pitch/PU wather-resistance membrane coated on the concrete surface, it can thoroughly seal the vacancy of pentrated by the water and air. So we can appropri-ate manufacture the high performance of water-resistance membrane of Pitch/PU.