Effect of accelerated thermal ageing on the thermal behaviour of the recently made parchments
Effect of accelerated thermal ageing on the thermal behaviour of the recently made parchments
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DOI：
10.1007/s10973-008-9103-2
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发表时间：
2008-11
影响因子：
4.4
通讯作者：
P. Budrugeac;L. Miu
中科院分区：
文献类型：
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作者：
P. Budrugeac;L. Miu
为了揭示羊皮纸的火灾损伤，用热分析方法(DSC；同时的TG/DTG，DSC；微型热台)测定了不同动物来源的羊皮纸在热老化过程中热行为的变化。研究表明，羊皮纸的热老化使其在静态空气中脱水过程的收缩温度、水中变性热的绝对值降低，非等温参数发生变化。在N_2和O_2流动中进行的DSC分析以及TG/DTG、DSC同步分析的结果表明，软化(熔融)过程参数和热氧化过程参数都没有因热老化而改变。热分析方法得到的结果与浸泡在水中的羊皮纸样品的显微镜观察和扫描电子显微镜(SEM)的结果相关联。这些显微技术的应用揭示了被调查的羊皮纸由于热降解而发生的形态变化。
To reveal the fire injuring of parchment, the changes in the thermal behaviour of some goat parchments, obtained from skins originating from different animals, as a result of thermal aging were determined by thermal analysis methods (DSC; simultaneous TG/DTG, DSC; micro hot table (MHT)). Thermal aging of parchments was revealed to bring about the decrease in shrinkage temperature, absolute value of enthalpy of denaturation in water and some changes in non-isothermal parameters characteristic for dehydration process in static air atmosphere. The results obtained by DSC analysis performed in N2and O2flows as well as those obtained by simultaneous TG/DTG, DSC analyses have shown that both softening (melting) process parameters and parameters of thermo-oxidative processes have not been changed by thermal ageing. The results obtained by thermal analysis methods were correlated with those obtained by microscopic investigation of parchment samples immersed in water and scanning electron microscopy (SEM). The application of these microscopic techniques has revealed the morphology changes in the investigated parchments as a result of thermal degradation.