金屬氧化物對聚乙烯醇縮丁醛之劣化反應研究

Effects of Metal Oxides on the Thermal Degradation of Polyvinyl Butyral

許戎毅(Rung-Yi Shiu)

指導教授 ： 洪信國

元智大學/工程學院/化學工程與材料科學學系/碩士(2008年)

https://doi.org/10.6838/YZU.2008.00277

摘要

本研究為探討金屬氧化物，氧化銅、氧化亞銅與氧化鐵對聚乙烯醇縮丁醛(Polyvinyl Butyral，PVB)劣解反應之影響。本實驗主要利用傅立葉紅外線光譜儀(Fourier transform infrared spectrometer，FTIR)觀察官能基變化，再由二維紅外光光譜(Two-Dimensional Infrared Spectroscopy，2D IR)分析變化機制，再由熱重量分析儀(Thermogravimetric Analysis，TGA)分析劣解動力。由IR圖譜可得氧化銅與氧化亞銅會催化PVB氧化反應，氧化鐵在230 ℃下時未見有明顯催化效果，官能基劣解速率為氧化銅 > 氧化亞銅 > 氧化鐵。由TGA結果証實加入氧化銅、氧化亞銅、與氧化鐵之樣品皆加速劣解。由2D-IR得劣解官能基變化時間自先至晚順序為: C=O(遞增) > C=C(遞增) > O-H(遞減) > C-C(遞減) > C-O(遞減)。

關鍵字

聚乙烯醇縮丁醛 ； 金屬氧化物 ； 劣化反應 ； 二維紅外光光譜 ； 熱重量分析儀

並列摘要

The effects of cuprous oxides, cupric oxides, and iron oxides on the degradation of polyvinyl butyral (PVB) are studied with Fourier transform infrared spectroscopy (FTIR), Two-Dimensional Infrared Spectroscopy (2-D FTIR) and Thermogravimetric Analysis (TGA). From FTIR analyses, it is obtained that the copper oxides can accelerate the formation of carbonyl groups in PVB at 230oC, and the rates of functional groups changes of different specimens follow the order of cupric oxides > cuprous oxides > iron oxides > as-received PVB. The catalytic effects of metal oxides on the weight loss and degradation kinetics of PVB are also confirmed by TGA analyses. The order of changes of different functional groups formed in PVB during the high temperature exposure is C=O (increase) > C=C (increase) > O-H (decrease) > C-C (decrease) > C-O (decrease) according to 2-D FTIR results, which indicates that the formation of C=O groups is the earliest while the loss of C-O is the last during the degradation reaction.

並列關鍵字

PVB, copper oxides, degradation, 2-D FTIR, TGA

參考文獻

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