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Investigation of the physico-chemical structure of oxycellulose after storage for two years and determined by derivatograph

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Abstract

The effect of ageing for a period of two years upon chemically pre-oxidized and irradiated cellulose was investigated. Changes in the chemical structure and energy excitation of atomic groups of oxycellulose skeleton were evaluated from the qualitative and quantitative points of view. The numerical interpretation and complex comparison of the quantities (activation energy, energy quantity EW, values of the thermal effect (areas of DTA peaks) and weight losses) of four degradation phases of pyrolysis were employed, when applying the oxidation pyrolysis method with derivatograph.

Zusammenfassung

Die Wirkung einer zweijährigen Alterung von chemisch voroxydierter und bestrahlter Zellulose wurde untersucht. Veränderungen der chemischen Struktur und die energetische Anregung von Atomgruppen des Oxyzellulosegerüsts wurden unter qualitativen und quantitativen Gesichtspunkten studiert. Eine numerische Interpretation und ein komplexer Vergleich der Größen (Aktivierungsenergie, EnergiemengeEW, Werte der thermischen Effekte — DTA-Peakflächen, Gewichtsverluste) von 4 pyrolytischen Abbauphasen wurden vorgenommen, wobei für die oxydative Pyrolyse ein Derivatograph verwendet wurde.

Резюме

Для исследования влы яния двухлетнего пер иода старения целлюлозы, п редварительно химически окисленно й и затем облученной, б ыл использован метод ок ислительного пироли за с дериватографом. Про ведена качественная и количественная оцен ка изменений химичес кой структуры и энергий в озбуждения атомных г руппировок оксицеллюлозы. Для че тырех стадий пиролиза приведена к оличественная интер претация и дано сопоставление т аких параметров, как энергия активации, ко личество энергииEW, ве личины термических эффекто в (площади ДТАпихов) и потери веса.

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Authors and Affiliations

  1. State Textile Research Institute, Radiation Technology Centre, 664 71, Veverská Bítýška, Czechoslovakia

    J. Blaha, P. Černý & I. Blažiček

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  1. J. Blaha
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  2. P. Černý
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  3. I. Blažiček
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Blaha, J., Černý, P. & Blažiček, I. Investigation of the physico-chemical structure of oxycellulose after storage for two years and determined by derivatograph. Journal of Thermal Analysis 30, 1013–1026 (1985). https://doi.org/10.1007/BF02108532

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  • DOI: https://doi.org/10.1007/BF02108532

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