Study On Pyrolysis And Combustion Characteristics Of The Interior Decoration Materials

As the indoor decorative materials are widely used, the risk of fire increasingly serious. By the study of pyrolysis and burning characteristics of indoor decorative materials, We can have a rudimentary knowledge of fire genetic, developmental and spread feature, and provide theoretical guidance to select materials and control of fire So. it is of great significance.On the premise of in-depth research on the selected decorative materials, this study set different experimental conditions to conduct pyrolysis experiments and thermo kinetic analysis,and conduct burning or decompose smoke density experiment on the selected materials. During the course of experiments, the pyrolytic and burning characteristics of decorative materials are comprehensive considered. The study result can give some advising on the decorative materials selection and fire prevention.First, an overview of research situation at home and abroad on decorative materials fire risks is talked in this article. In accordance with Increasingly serious fire situation in tall Buildings at the present time, combining with the urgency of indoor health and security that people pay attention to, the research method and content of this paper are present.Then,the study select floor, wallpaper, carpet and cotton as experimental materials, and grouped it according to it's nature.Next, conduct the thermogravimetry experiment with heat rate of 10℃/min,15℃/min and 20℃/min. By the use of EXCEL and Origin software, the TG, DTG and DSC Curve are analyzed. The research result indicates that most of the decorative materials pyrolysis process can be divided into three reaction stages. The main stage is cellulose and hemi-cellulose pyrolysis, moistures and lignin pyrolysis stage occupied smaller ratio. With the adding of heating rate, the reaction pushed high-temperature area, and the influence of opening pyrolytic temperature and pyrolytic temperature range are obvious;Increased the air flow makes the TG curve moves to lower temperature, increases the fire risk of materials. Meanwhile, with the amount of the sample increases, the TG curves shift to high temperature. By the contrast study of solid G(a) model, the pyrolysis dynamics model of decorative materials were build. And the parameters of Thermal Analysis Kinetics activation energy (E) and pre-exponential factor (A) were solved. At last, considering smoke characteristics of the materials, experiments of density of smoke from the burning or decomposition of all kinds of materials were conduct, and calculated the maximum smoke density (MSD) and smoke density rating (SDR). The research results provide technical parameters for reasonable selection of materials and fire prevention.