良好的抗流掛與流平性對於塗漆之塗佈扮演關鍵性的角色。抗流掛與流平性質的相關應用以及分析技術於先前已經具有廣泛的文獻報導，然而於烘烤與升溫過程中塗料流變性質的變化對於抗流掛與流平性質的影響則鮮少被深入探討。本研究結合常溫與升溫兩種不同的流變量測方式，針對五種不同二異氰酸酯結構之尿素分子的樹脂溶液，於固定尿素比例下，探討原始溶液、添加硬化劑的清漆、以及添加鈦白粉後的白漆樣品、其相應的抗流掛與流平性質。首先透過常溫三階段應力測試與振幅掃描，探討不同抗流掛樹脂樣品的搖變行為。研究結果顯示，樹脂溶液本身的流變與搖變性質與實際塗料之噴塗性質有很高的關連性，尤其是抗流掛的能力。然而常溫之流變量測無法同時解析抗流掛與流平性質，因此後續實驗透過溫度與時間掃描，成功建立原始溶液、清漆、與白漆樣品抗流掛與流平性質辨析的依據。本研究所提出的流變分析技術可以廣泛使用在相關的材料系統，達到樣品快篩與提升工業產品開發效率的目的。

Sagging-controlled agent (SCA) plays a key role in assuring the performance and quality of painting materials. Although there had been some reports on the analysis schemes for anti-sagging and leveling evaluation, few or no studies were devoted to exploring the effects of altered rheological properties during baking after the spraying of a paint. In this research, resin solutions made of urea molecules synthesized by five different diisocyanate isomers with benzyl amine in polyester solution medium are considered as the model SCAs. These resin solutions, along with two of their counterpart model paint systems which selectively add hardner or titanium dioxide, are investigated using time- and temperature-sweep rheological characterizations. The goal is to mimic the baking procedure of real paints while monitoring their anti-sagging and leveling behaviors. The results indicate that, in contrast with the three-step stress experiment carried out at ambient temperature that has proven effective for discriminating the anti-sagging but not leveling performance of the model SCAs, the temporal and non-isothermal rheological characterizations noted above show promising ability to discriminate anti-sagging and leveling properties at one time, and the results for the model SCAs are in excellent agreement with those of their counterpart paint systems. The strategy and analysis schemes proposed herein are expected to greatly facilitate the early identification of potential resin samples and urea molecule designs that would serve as excellent SCAs.

目錄
謝辭 i
摘要 ii
Abstract iiii
圖目錄 viii
第1章 緒論 1
第2章 實驗部分 5
2-1 實驗藥品與配置 5
2-2 流變實驗 6
2-2-1 儀器設備 6
2-2-2 預剪切處理 (pre-shearing) 7
2-2-3 實際噴塗測試 8
2-2-4 振幅掃描 (amplitude sweep) 9
2-2-5 三階段應力實驗 (3-step tests) 9
2-2-6 溫度掃描 (temperature sweep) 10
2-2-7 時間掃描 (time sweep) 10
第3章 結果與討論 11
3-1 實際噴塗測試 11
3-1-1 噴塗抗流掛情形 11
3-1-2 噴塗流平性情形 12
3-2 五種不同樹脂樣品之抗流掛與流平性質分析 14
3-2-1 振幅掃描 14
3-2-2 三階段應力測試 17
3-2-3 溫度掃描 18
3-3 非等溫條件下硬化劑交聯反應對抗流掛與流平性質影響之分析….. 27
3-3-1 溫度時間掃描 27
3-4 非等溫條件下白漆交聯反應對抗流掛與流平性質影響之分析 31
3-4-1 溫度時間掃描 32
第4章 結論 36
參考文獻 38
附錄A 42
A-1 不同頻率 (a) 0.1 Hz (b) 40 Hz 下 TDI、IPDI 與聚脂樹脂清漆樣品硬化劑交聯反應之溫度時間掃描圖譜 42
附錄B 45
B-1 不同頻率 (a) 0.1 Hz (b) 40 Hz 下 MDI 與 IPDI 白漆樣品硬化劑交聯反應之溫度時間掃描圖譜 45

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