Die-swell is an important parameter for characterization of elastic properties during extrusion polymeric melts, and the degree swell usually expressed by die-swell ratio (B). The polypropylene composites filled with diatomite different particle sizes (volume fraction 10%) was measured means a melt flow rate instrument to investigate effects die geometry conditions on behavior composite melts temperature varying from 210 230 °C load 5 12.5 kg. results showed that B increased nonlinearly...

Abstract In view of the problem difficult treatment pile spoil in infrastructure construction, solid waste-based cementitious material was designed and used as solidifier for spoil. The modification on studied from aspects physical chemical characteristics, microstructure, engineering characteristics. results show that material, primarily composed granulated blast furnace slag (GBFS) powder, steel dust, desulfurization gypsum, exhibits excellent synergistic hydration effects. Under action...

A kind of carbon black (CB), which was surface-treated by silane-coupling agent, compounded with high-density polyethylene (HDPE) in a twin-screw extruder, and then the composites were molded into specimens plastic injection molding machine. The weight fractions (φ f ) CB 0, 3, 5 8%. effects loading on mechanical properties, such as tensile yield strength, fracture elongation, flexural modulus impact strength HDPE/CB antistatic composites, investigated. results expressed that increased...

ABSTRACT Some rigid polyurethane foam (RPUF) composites modified with microencapsulated red phosphorus (MRP), magnesium hydrate (Mg(OH) 2 ), glass fiber (GF), and hollow bead (HGB) were prepared. The influence of the MRP, Mg(OH) , GF, HGB on flame‐retardant, combustion, mechanical properties filled RPUF was investigated. results showed that flame‐retardant combustion obviously improved, limiting oxygen index, half burning time residual mass/original mass ratio increased increasing MRP/Mg(OH)...

The dispersion of rigid inorganic particles (RIP) in polymer matrix is discussed and an equation for estimation the proposed. glass beads (GB) polypropylene (PP) PP/ethylene-propylene-diene monomer co-polymer (EPDM) blend was measured by means thermogravimetric analysis (TGA). It found that effects filler surface treatment modification on uniformity PP insignificant at low concentration. But filled with small better than big GB-filled system. Moreover, values weight fraction were somewhat...

Abstract A novel nanocomposite Cu/PtFe/carbon nanotubes (CNTs) was designed, prepared and examined as a cathode catalyst for direct methanol fuel cells (DMFCs). The effects of Fe Cu on oxygen reduction reaction (ORR) activity tolerance were investigated by varying their amounts or configurations in the nanocomposite. experimental results show that PtFe alloy CNTs could not enhance tolerance, but improve ORR activity. deposited PtFe/CNTs to obtain better tolerance. optimum molar ratio...

On the basis of Ashelby’s method and Mori’s work, a simplified equation describing relationship between storage modulus filler volume fraction for polymer composites filled with inorganic particles was proposed. The dynamic mechanical properties low-density polyethylene glass beads were measured using Du Pont dynamical analysis instrument in temperature range from —150°C to 100°C. It found that increased roughly nonlinearly an increase bead weight fraction. relative these estimated by means...

The extrudate swell behavior of polypropylene (PP) composite melts filled with multi‐walled carbon nanotubes (MWCNTs) was studied using a capillary rheometer in temperature range from 190 to 230°C and at various apparent shear rates varying 50 800 s −1 . It found that the values ratio composites increased nonlinearly increasing rates, while decreased almost linearly temperature. melt approximately stress, an increase MWCNT weight fraction. In addition, mechanisms were discussed observation...

Abstract Extrudate swell (i.e., die swell) is an important parameter for characterization of melt elasticity during extrusion polymeric melts, and ratio ( B ) usually used to describe quantitatively the degree. The polypropylene (PP) composites filled with diatomite particles was measured by means a flow rate instrument investigate effects filler content size on behavior composite system melts under experimental conditions temperature from 210 230°C load varying 1.2 7.5 kg. particle...

Abstract Polypropylene (PP) flame retardant composites filled with aluminum hydroxide (Al(OH) 3 ), magnesium (Mg(OH) 2 ) as well zinc borate (ZB) were prepared a twin‐screw extruder. The melt volume flow rate ( MVR and density of the measured by means instrument under experimental conditions temperature 180°C load varying from 2.16 to 5 kg, identify effects particle size content. results showed that decreased an increase filler weigh fraction (ϕ f when ϕ was more than 10 phr. first then...

A 3-D simulation of interfacial stress distribution between particulate and matrix during tension a polypropylene/calcium carbonate is made by means finite element method with ANSYS. The results show that the shear increases increasing angle from equator particle (α) reaches maximum around 20°. tensile at Y direction α then slightly varies when more than 50°. X decreases minimum 35°. model gentler 2-D model.