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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Blends of bitumen with polar polymers
Blends of a Venezuelan 100 penetration grade bitumen have been made in a Z-blade masticator mixer with four common polar polymers - poly(vinyl chloride), poly(ethylene terephthalate), Nylon 11, and a thermoplastic polyurethane - at levels ranging from 10 to 40 pph (i.e. 9 to 29 wt-%). They were characterised by fluorescence optical microscopy, differential scanning calorimetry, and dynamic mechanical thermal analysis. All blends were stiffer than the bitumen by at least a factor of 50 at temperatures below the glass transition, which was lowered by the presence of the polymer. Loss processes were detected at about 40 to 60 deg C in the ploy(ethylene terephthalate) and Nylon 11 blends, in the latter case being clear when the concentration rose to 40 pph, as if a polymer rich phase was then extensive. The blends at high temperatures were much more viscous than the bitumen, but all flowed readily at temperatures between 70 and 120 deg C.
Blends of bitumen with polar polymers
Blends of a Venezuelan 100 penetration grade bitumen have been made in a Z-blade masticator mixer with four common polar polymers - poly(vinyl chloride), poly(ethylene terephthalate), Nylon 11, and a thermoplastic polyurethane - at levels ranging from 10 to 40 pph (i.e. 9 to 29 wt-%). They were characterised by fluorescence optical microscopy, differential scanning calorimetry, and dynamic mechanical thermal analysis. All blends were stiffer than the bitumen by at least a factor of 50 at temperatures below the glass transition, which was lowered by the presence of the polymer. Loss processes were detected at about 40 to 60 deg C in the ploy(ethylene terephthalate) and Nylon 11 blends, in the latter case being clear when the concentration rose to 40 pph, as if a polymer rich phase was then extensive. The blends at high temperatures were much more viscous than the bitumen, but all flowed readily at temperatures between 70 and 120 deg C.
Blends of bitumen with polar polymers
Mischungen von Bitumen mit polaren Polymeren
McNally, T. (Autor:in) / Fawcett, A.H. (Autor:in) / McNally, G.M. (Autor:in)
Plastics, Rubber and Composites ; 29 ; 385-390
2000
6 Seiten, 7 Bilder, 5 Tabellen, 19 Quellen
Aufsatz (Zeitschrift)
Englisch
Gemisch , Bitumen , synthetisches Polymer , polare Verbindung , Polyvinylchlorid , Polyethylenterephthalat , Polyamid-11 , Elastomer , Thermoplastizität , Steifigkeit , Viskosität , Fließfähigkeit , Temperaturbereich , Glasumwandlungstemperatur , mechanische Eigenschaft , Kristallinität , thermoplastisches Elastomer
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