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Thermogravimetric Determination of Synthetic Polymers in Recycled Pulp Systems and Deposits

机译:热重法测定回收纸浆系统和沉积物中的合成聚合物

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摘要

It is well known that synthetic polymers are often a major component of stickies deposits which reduce paper machine runnability and the quality of the paper produced. In this paper, we propose a new thermogravimetric technique for the determination of synthetic polymers in pulp, paper, process water and deposits. The technique is based on the observation that thepyrolysis in nitrogen of the major synthetic polymers such as ethylenevinyl acetate, polyvinyl acetate andstyrene butadiene rubber takes place at higher temperatures than those of natural polymers in wood fibres. A case study at a mill is used to demonstrate the applicability of the method for identifying the origin of the stickies problem.
机译:众所周知,合成聚合物通常是粘性沉积物的主要成分,这会降低造纸机的运行性能和所生产纸张的质量。在本文中,我们提出了一种新的热重技术,用于测定纸浆,纸张,工艺用水和沉积物中的合成聚合物。该技术基于以下观察结果:主要合成聚合物(例如,乙烯乙酸乙烯酯,聚乙酸乙烯酯和丁苯橡胶)在氮中的热解温度高于木纤维中天然聚合物的温度。通过在工厂的案例研究来证明该方法可用于确定胶粘剂问题的来源。

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