本研究以市售之高分子聚合防水塗料為研究對象。嘗試了解該項材料用於混凝土屋頂建材之附著行為。量測兩物體界面間附著強度之方法包括拉拔、剝離、刮痕、擠壓及水泡試驗等。由於不同試驗之力學機制不同，故無統一理論模式可運用於分析其實驗數據。本研究採破壞能量模式與強度量測方式解讀塗膜材料與 混凝土間之附著強度。理論模式以Hsueh(2002)所建議者探討材料各項參數及環境溫度之影響，藉比較應變能釋放率及破裂能量大小探討附著之破壞性。試驗則採用拉拔黏附試驗，配合溫度、塗膜厚度以及基材表面條件之變化，觀察其影響性，此外亦試圖了解塗膜之耐候性。研究結果發現如下：(1)塗膜楊氏模數及塗膜厚度對其附著性影響較大。楊氏模數愈小者發生附著破壞之機會愈高，塗膜楊氏模數增加時，其附著強度亦提升。塗膜厚度愈厚愈容易發生附著性破壞。(2)塗膜受升溫降溫之溫差作用時會提升塗膜之附著強度。(3)塗膜之柏松比及塗膜寬度之影響極微。(4)實驗觀察可驗證模式各項參數變化對其附著強度所產生的影響。 This study was developed to understand the adhesion between an exterior roof water proof coating of manufactured polymer materials and the concrete substrate. The experiments on the adhesion mechanism can be conducted using pull-off, peer, scratch, indentation and blister tests. Because the mechanisms of the tests are quite different, there would be no unique theory to interpret the adhesion data. This study uses an analytical model from the failure energy theory and the pull-off strength measurements to monitor the adhesion between the coating and the concrete base. The theoretical model suggested by Hsueh (2002) can be used to discuss the influence factors and the temperature effects. One can compare the strain energy release rate with the energy of rupture to determine whether the adhesion fails or not. The tests help to show the effects of temperature, thickness of the coating and roughness of the substrate. The analysis of coating-substrate failure models and the experiments revealed that (1) the Young’s modulus of the coating material and its thickness affect interface adhesion the most. The lower the Young’s modulus was, the higher the failure probability would be. Greater coating thickness would reduce the adhesion to yield failure. (2) Raising or dropping the temperature to a limit could enlarge the adhesion strength of the coating. (3) Both the Poisson’s ratio of the coating and the coating width has minor effects on the adhesion. (4) The pull-off strength tests can be used to verify the influences of the variables suggested in the theoretical model.
