Degradation behaviour of polymeric materials found in auto Shredder residue wastes

Abstract

The therrnogravimetry of a series of 50/50 mixtures of polypropylene, acrylonitrile/butadiene/styrene, polyvinyl chloride and polyurethane polymers have been studied as representative of the major polymeric materials found in automobile shredder residues. The weight loss behaviour of these polymeric mixes have been compared with the results calculated from the individual polymeric components. This comparison of the thermogravimetry curves and the calculated kinetic parameters indicates that interactions occur between the individual polymers when heated together. The extent of these interactions are dependent upon the polymeric mixtures being considered, but in most cases the changes in the degradation kinetic parameters were not large.

Thermogravimetry as a tool to classify waste components to be used for energy generation

“…Similar findings have been reported by Day et al [41,42] who studied ABS, PP, PVC and PU mixtures and observed changes in the DTG peak temperatures and shapes. Day et al [43] stated that both diffusion and chemical interactions are possible for binary plastic mixtures.…”

The use of thermogravimetry to analyze a mixed plastic waste stream

“…Peak #1 at about 250~ however appears to be due to some other material which need not be polymeric such as engine oil, lubricants, etc. However, in a previous study we have shown that binary mixtures of these polymers can result in interactions causing changes in peak temperatures [11]. In this earlier study we compared experimental and calculated information and noted that interactions occurred in the degradation of mixed polymeric components.…”

Kinetic model for thermal dehydrochlorination of poly(vinyl chloride)

“…The kinetics of the thermal dehydrochlorination of PVC has been extensively studied in literature using both isothermal and linear heating rate methods [12,13,[38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57]. It is striking the very broad dispersion of results in terms of kinetic parameters reported in these papers.…”

“…It is striking the very broad dispersion of results in terms of kinetic parameters reported in these papers. Most of the kinetic studies of thermal dehydrochlorination of PVC assume an n order kinetic model for the analysis [12,13,[38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][58][59][60][61][62]. Additionally, some authors have used a more complex approach by proposing either two consecutive [8,13,50] or two competitive [49] n order kinetic models.…”