數位影像於高分子材料玻璃轉換溫度之量測

Measurement of Glass Transition Temperature of Polymer Materials Based on Digital Images

鄭朝立(Chao-Li Zheng)

指導教授 ： 徐烱勛

國立虎尾科技大學/工程學院/機械與機電工程研究所/碩士(2014年)

摘要

高分子材料已廣泛應用於軟性顯示器、生醫、太陽能等領域，與其他材料相比，高分子材料最大不同在於其性質會隨著溫度變化而有轉移的現象，而其中更以玻璃轉換溫度最為重要。當高分材料之溫度達到玻璃轉換溫度時，高分子材料之機械、尺寸、光學與熱力學等性質皆會產生顯著之變化，因此發展量測高分子材料的玻璃轉換溫度確為一重要之工作。
本文利用於數位影像之灰度變化，用於量測高分子材料之玻璃轉換溫度，首先利用一投影機分別投射長條形與網格狀之數位影像於高分子材料上，並記錄數位影像灰度與溫度變化之關係已獲得玻璃轉換溫度，並將所得之結果與動態量測法所得之結果進行比較。

關鍵字

高分子材料 ； 玻璃轉換溫度 ； 數位影像

並列摘要

Polymer materials have been widely used in flexible displays, biomedicine, solar energy, etc.. As compared with other materials, one of their most different is that polymer materials have transition phenomena as their temperature increases. Among the transition temperatures of polymer materials, glass transition temperature (Tg) is the most important one. When temperature of polymer materials increase up to its Tg, all of its exhibiting properties including mechanical, dimensional, optics, and thermodynamics properties dramatically change. As a result, it is an important issue to develop an experimental technique to measure their Tg.
The study aims to measure Tg based on the gray level variation of digital images. A projector was first utilized to respectively project parallel and grid styles images onto the polymer materials. The relation between variation of gray level of digital image and temperature was recorded to extract Tg. Finally, the measurement results were compared with those obtained by dynamic mechanical analyzer (DMA)

並列關鍵字

Polymer materials ； Glass transition temperature ； Digital images

參考文獻

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