Measurement of thermal conductivity of hollow glass-bead-filled polypropylene composites

2006 ◽  
Vol 25 (4) ◽  
pp. 527-531 ◽  
Author(s):  
J.Z. Liang ◽  
F.H. Li
Keyword(s):  
Thermal Conductivity ◽  
Glass Bead ◽  
Hollow Glass ◽  
Polypropylene Composites

Tailoring of thermal and mechanical properties of hollow glass bead‐filled polypropylene porous Films via stretching ratio and filler content

2018 ◽  
Vol 40 (7) ◽  
pp. 2938-2945
Author(s):  
Fatemeh Barzegari ◽  
Jalil Morshedian ◽  
Mohammad Razavi‐Nouri ◽  
Milad Karbalaei‐Bagher
Keyword(s):  
Mechanical Properties ◽  
Glass Bead ◽  
Filler Content ◽  
Thermal And Mechanical Properties ◽  
Porous Films ◽  
Hollow Glass ◽  
Stretching Ratio

Melt extrudate swell behavior of polypropylene composites filled with hollow glass beads

2012 ◽  
Vol 32 (4-5) ◽  
pp. 259-263 ◽  
Author(s):  
Ji-Zhao Liang ◽  
Ming-Qiang Zhong
Keyword(s):  
Volume Fraction ◽  
Deformation Energy ◽  
Glass Beads ◽  
Screw Extruder ◽  
Extrudate Swell ◽  
Experimental Conditions ◽  
Hollow Glass ◽  
Polypropylene Composites ◽  
Swell Ratio ◽  
Twin Screw

Abstract Polypropylene (PP) composites filled with hollow glass beads (HGB) were prepared by means of a twin-screw extruder. The extrudate swell ratio (B) of the PP/HGB composite melts was measured using a melt flow indexer under experimental conditions, with temperatures from 190°C to 230°C and loads varying from 1.20 kg to 7.50 kg, to identify the effects of the extrusion conditions and the particle size and content on the extrudate swell of composite melts. The results showed that the value of B of the composites increased nonlinearly with an increase of shear stress, while it decreased linearly with a rise of temperature. When the load and temperature were constant, the value of B increased nonlinearly with an increase of the HGB diameter, whereas it reduced nonlinearly with an increase of the HGB volume fraction. This should be attributed to the elastic deformation energy stored in the flow of the composite melts, which was decreased with an increase of the HGB number and content.

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