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- W267873186 abstract "Boehmites are colloidal rod-like particles with high anisotropy. Their aspect ratio can have different values depending on method of preparation. Boehmites can be obtained as highly pure, highly dispersible colloidal powders with primary particle in nanometer scale. In polymer matrix e.g. in polyamide 6 the Boehmite particles form well defined nanocomposites [1]. Boehmites in polymer matrix contribute to their higher mechanical properties [2, 3], hydrophility [4] and porosity [5]. They can change the UV barrier properties and photostability of polymers. This paper deals with polymer composites, especial polypropylene/Boehmite composites, their rheological behaviour as well as structure and mechanical properties of hybrid fibres. The concentrate dispersion of Boehmites D40, D60, DUN and DAM in PP M500R were prepared using twin screw extruder: C1PP M500R/D40, 10 wt%; C2 remelted C1 (250 °C); C3 -diluted C2 with PP M561N, 2,5 wt%; C4 diluted C3 with PP M561N, 1.0 wt%; C5 concentrate dispersion of modified Boehmite by organic carboxylic acid (DUN) and C6 PP/Boehmite functionalised with –NH2 groups (DAM). The rheological properties of PP/Boehmite concentrate dispersions were measured using capillary extrusiometer Gottfert N 6967. The apparent viscosity η and power law exponent n were evaluated [6]. Results of measurement are given on the Figure 1. 4,2 4,4 4,6 4,8 5,0 5,2 2,0 2,4 2,8 3,2 log γ lo g τ s" @default.
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- W267873186 date "2007-01-01" @default.
- W267873186 modified "2023-09-26" @default.
- W267873186 title "Rheological Behaviour of Polypropylene/Boehmite Composites, Structure and Properties of Hybrid Fibres" @default.
- W267873186 hasPublicationYear "2007" @default.
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