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題名 | Studies on Thermodegradation of Poly (Dimethyl Sulfate QuaternizedD imethylaminoethyl Methacrylate)=聚 ﹝二甲基 (甲基丙烯酸乙基) 銨二甲基硫酸鹽﹞ 之熱分解研究 |
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作者 | 廖德章; 蕭灑真; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷期 | 19:4 1988.07[民77.07] |
頁次 | 頁225-233 |
分類號 | 460.02 |
關鍵詞 | 二甲基; 甲基丙烯酸乙基; 聚; 銨二甲基硫酸鹽; 熱分解; |
語文 | 英文(English) |
中文摘要 | 本文探討聚[二甲基(甲基丙烯酸乙基)銨二甲基硫酸鹽]在不同升溫速率及在氮氣和空氣中之熱分解性質。利用Ozawa之方法計算各種動力學參數如活化能,碰撞係數及反應級數等。此高分子聚合物在氮氧及空氣中均為二段熱解反應,且皆為一級反應。聚合體之樣品重量愈大則溫度區間也愈大,該聚合物之玻璃轉化溫度在氮氣中為56.58℃。聚合物之質譜亦顯示為二段熱解,在低溫區間主要是聚合物上之支鏈分解而高溫區間則為主鏈之斷裂。 |
英文摘要 | The thermodegradation of poly (dimethyl sulfate quaternized dimethyl amino ethyl methacrylate), [poly(DMAEM.C2H4SO4)], at different heating rates under nitrogen and air atmosphere was investigated. For calculating the kinetic parameters, such as activation energy, preexponential factor and reaction order, the Ozawa’s method was applied. Thermodgradation of such polymer occurs in two Ozawa’s method was applied. Thermodegradation of such polymer occurs in two stages both in nitrogen and air atmosphere. Larger sample weights produce a larger temperature interval (△T). The kinetic order of degradation is determined to be unity both in nitrogen and stamospheric air. The glass transition temperature (Tg) for poly (DMAEM.C2H4SO4) is found to be 56.58℃ in nitrogen. The mass spectra of such polymer also shows the two degradation sections. The polymer is mainly destroyed at the side chain at the lower temperature section, and at the mainly destroyed at the side chain at the lower temperature section, and at the main chain at the higher temperature section. |
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