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Materiale Plastice
https://doi.org/10.37358/Mat.Plast.1964

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ISSN 2668-8220 (online)
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Materiale Plastice, Volume 43, Issue 1, pp. (2006)




Practical Application of Atactic Polypropylene in Hydroinsulation Membranes and Bitumen


Abstract:
The atactic polypropylene (APP) recovery as hydro insulation membranes and / or bitumen presents two main advantages: the great quantities that can be reprocessed and the elevated usage life of the obtained products, a consequence of lack of the photo and thermal degradation during usage. It is well know that the photo and thermal degradation rapidly diminishes the utilization properties, namely the usage life. The recovery into hydro insulation membranes and / or bitumen is possible if the APP was selected based on thermo - oxidative stability criteria typically for a good incorporation into the melt bitumen at 180 0 C for 4 - 10 hours and for RTFOT or TFOT tests. The RTFOT thermo - oxidative stability criterion, according to which the mass loosing at 163 0C for 80 min. must be smaller than 0, 8 %, is fulfilled only if the APP has a weight molecular mass greater than 8000 and a solid consistency. If these two criteria are not fulfilled the APP can be recovered as hot melt adhesives. Keywords: atactic polypropylene, practical application, hydro insulation membranes and bitumen



Issue: 2006 Volume 43, Number 1
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