Pyrolysis applications Polypropylene

Polypropylene is also used in a number of blends, some of them with applications in rubber industry, automotive industry, home constructions, etc. Some of the copolymers and blends used in rubber industry are vulcanized. Studies on thermal properties and pyrolysis of these copolymers and blends are common in literature [97, 105,110-118]. 

The critical values of the mass pyrolysis rate, heat release rates, and water application rates for flame extinction for polymers, are listed in Table 53.14. For the polymers listed in the table, the critical values of the heat release rates do not depend on the generic namres of the polymers. The average critical values of the chemical, convective, and radiative heat release rates are 100 + 7, 53+9, and 47 +10 kW/m, respectively. The critical water application rate required for flame extinction is polyoxymethylene, polymethylmethacrylate and polyethylene with 25% chlorine (2.1-2.5g/m -s)[Pg.913]

The identification and estimation of polypropylene and its copolymers by IR and NMR spectroscopy is well established and documented, as are the difficulties encountered during the application of pyrolysis/gas chromatography [2, 3]. IR spectroscopy is a rapid and precise means of characterisation, but the detection of copolymers can be difficult in filled materials and separation of the polymer is advantageous. 

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