中文摘要：

为研究聚氯乙烯（polyvinyl chloride，PVC）类与生物质类医疗废物的混合热解特性，利用差热热重分析仪，在氮气气氛下，对输液管（tube for transfusion，TFT；含PVC）和纱布（含纤维素）样品在不同质量配比下进行了混合热解实验，深入研究二者混合热解的行为与规律．结果表明：输液管的存在会显著加速纱布的热解，失重峰温降低40℃以上；纱布对输液管的热解存在轻微促进作用，使HCl脱除反应的失重峰温降低约5℃；混合前后，输液管的第二阶段热解反应没有发生太大变化；混合后残炭总量大于两种纯物质单独热解时的残炭质量；二者混合热解的反应机理在于输液管中PVC脱出的HCl通过酸催化作用加速了纱布中纤维素的脱水和醛类物质的生成；反之，纤维素中羟基的存在又加速了PVC脱HCl的反应．

英文摘要：

To obtain co-pyrolysis characteristics of medical wastes containing polyvinyl chloride（PVC）and bionlass, co-pyrolysis experiments on mixtures of tube for transfusion （TFT） and gauze at different mass proportions, whose main ingredients were PVC and cellulose respectively, were carried out in an atmosphere of N2 using the thermogravimetric analyser （TGA）. The co-pyrolysis behavior and mechanism were also studied. The results show that acceleration effect of TFT on gauze pyrolysis is remarkable with the DTG peak falling over 40 ℃ ; while, gauze slightly accelerate the first stage degradation of TFT, with lowering the DTG peak temperature of 5 ℃ or so; and there is no obvious effect on the second stage pyrolysis of TFT sample; the amount of residual char obtained from co- pyrolysis experiments is larger than individual ones; the co-pyrolysis mechanism of TFT and gauze is attributed to which, through catalytic action, HCl evolution from PVC causes dehydration and the aldehyde production from the original cellulose at lower temperature; vice versa, hydroxyl groups in cellulose may slightly accelerate HCl evolution from PVC.