首页> 外文期刊>Annali di Chimica: Journal of Analytical and Environmental Chemistry >DETERMINATION OF ENVIRONMENTAL PERSISTENCE AND THERMOGRAVIMETRIC ANALYSIS OF PAPER ARTIFICIALLY AGED BY PHOTOIRRADIATION
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DETERMINATION OF ENVIRONMENTAL PERSISTENCE AND THERMOGRAVIMETRIC ANALYSIS OF PAPER ARTIFICIALLY AGED BY PHOTOIRRADIATION

机译:光辐射人工老化纸的环境持久性测定和热重分析

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摘要

Fabriano paper was aged by irradiation with ultraviolet light (lambda =310) in a veterometer for 300 hours.At fixed time intervals,samples of the paper under test were analysed by titanium dioxide photosensor to determine electrochemically the "environmental persistence" index,by a suitable conductimeter method,to determine the specific conductivity variation and by thermogravimetry to determine the moisture content,the onset temperature of the cellulose degradation process and the value of the activation energy of the same process.The behaviour of these different types of indicators displayed approximately monotonous trends as a function of time.
机译:Fabriano纸在紫外线计中用紫外线(lambda = 310)照射300小时进行老化。在固定的时间间隔内,用二氧化钛光电传感器分析被测纸的样品,以电化学方式测定“环境持久性”指数,合适的电导仪方法,确定比电导率变化,并通过热重法确定水分含量,纤维素降解过程的起始温度和同一过程的活化能值。这些不同类型的指标的表现近似单调趋势随时间变化。

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