Modeling flow-induced crystallization in isotactic polypropylene at high shear rates
نویسندگان
چکیده
منابع مشابه
Extensional-flow-induced crystallization of isotactic polypropylene
A filament stretching extensional rheometer with a custom-built oven was used to investigate the effect of uniaxial flow on the crystallization of polypropylene. Prior to stretching, samples were heated to a temperature well above the melt temperature to erase their thermal and mechanical histories and the Janeschitz-Kriegl protocol was applied. The samples were stretched at extension rates in ...
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Dispersions of isotactic polypropylene (PP) particles in polystyrene (PS) were produced by interfacially driven breakup of nanolayers in multilayered systems that were fabricated by means of layer-multiplying coextrusion. The droplet size was controlled by the individual PP layer thickness ranging from 12 to 200 nm. In addition, PP was melt blended with PS to produce PP droplets larger than tho...
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Nucleation of the γ-form in isotactic polypropylene (PP) under high pressure was investigated. Three nucleating agents were used to nucleate crystallization of PP under atmospheric pressure: commercial Hyperform HPN-20E from Milliken Chemical, poly(tetrafluoroethylene) particles nucleating the α-form, and calcium pimelate nucleating the β-form. Crystallization of neat PP and PP with addition of...
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BOITOUT, Hugo, "Influence of the temperature on flow-induced crystallization of isotactic polypropylene and propylene-ethylene random copolymer" (2014). Influence of the temperature on flow-induced crystallization of isotactic polypropylene and propylene-ethylene random copolymer Influence of the temperature on flow-induced crystallization of isotactic polypropylene and propylene-ethylene rando...
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The effects of filler content and its surface treatment with silane coupling agent on the melt shear viscosity of glass bead-filled polypropylene (PP) composites have been investigated using a capillary rheometer at a wide shear rate scope of 150 to 7200 s and temperature range of 160 to 200 C. The melt flow obeys power law, but the slopes of the flow curves have transitions at the shear rate o...
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ژورنال
عنوان ژورنال: Journal of Rheology
سال: 2015
ISSN: 0148-6055,1520-8516
DOI: 10.1122/1.4913696