The strength of polymeric composites containing spherical fillers

Leidner, Jacob; Woodhams, R. T.

doi:10.1002/app.1974.070180606

Cited by 191 publications

(95 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(24)], we calculated birefringence of PP and then orientation factors for the amorphous areas of PP and N6 from eqs. (25) and (26).…”

Section: Calculation Of the Amorphous Orientation Factormentioning

confidence: 97%

“…where ⌬H°f ,PP and ⌬H°f ,N6 are the fusion enthalpies of completely crystalline PP and N6 materials, 26 respectively, and w PP and w N6 are the corresponding weight fractions of the two materials in the alloy filaments. The values of ⌬H°f were taken from the literature, which were 50 and 55 cal/g, respectively, for PP and N6.…”

Section: Thermal Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical and structural properties of melt spun polypropylene/nylon 6 alloy filaments

Afshari

Kotek

Gupta

et al. 2005

J of Applied Polymer Sci

View full text Add to dashboard Cite

ABSTRACT:Investigated in the present study are the physical properties, morphology, and structure of PP/N6 alloy filaments (10, 20 wt % N6) made with or without PP-g-MAH as compatibilizer. The alloy filaments produced at the take-up speeds of 300 and 800 m/min were drawn with draw ratio of 3.5 and 2, respectively. Stress-strain curves of PP and alloy filaments show ductile and brittle behavior, respectively. It is suggested that the brittle behavior of alloy filaments is due to the presence of microvoids or micropores at the interface of PP and N6; these lead to stress concentration and thus to a decrease in tenacity, modulus, and elongation at break. Effects of the blending of N6 with PP on birefringence and crystalline and amorphous orientation factors of the composite filaments are studied. The amorphous orientation factor, f am , of PP was found to increase with an increase in the amount of N6. The alloy filaments behaved like isostrain materials and most of the force in spinning and drawing was born by the PP phase. The presence of N6 fibrils helped to orient PP chain molecules in amorphous regions. However, the crystalline factor, f c , of PP decreased with the increase in nylon fraction. This means the presence of the crystals of N6 caused a decrease in the orientation of the PP crystals. LSCM micrographs of the filament showed the presence of matrix-fibril morphology with the N6 fibrils oriented along the axis.

show abstract

“…(24)], we calculated birefringence of PP and then orientation factors for the amorphous areas of PP and N6 from eqs. (25) and (26).…”

Section: Calculation Of the Amorphous Orientation Factormentioning

confidence: 97%

Section: Thermal Propertiesmentioning

confidence: 99%

Mechanical and structural properties of melt spun polypropylene/nylon 6 alloy filaments

Afshari

Kotek

Gupta

et al. 2005

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…14 The ultimate strain of the composite, ec was approximated by the derived expression: ( 11) where em is the strain of the matrix at a stress equal to that carried by the matrix at the fracture point of the composite; ece represents the ultimate strain of the elastic material having the ultimate strain equal to (Jc and i::me the ultimate strain of the elastic material having an ultimate strength equal to (Jm· One of the assumptions was good matrix-filler adhesion or if the composites have poor matrix-filler adhesion, the ultimate strain was limited to low strain value only (up to about 5% only). Thus the equation is not applicable to the RHA/polypropylene system that have poor matrix-filler adhesion and excessively high strain value.…”

Section: Tensile Propertiesmentioning

confidence: 99%

Mechanical Properties of Rice Husk Ash/Polypropylene Composites

Fuad

Ismail

Mansor

et al. 1995

Polym J

View full text Add to dashboard Cite

ABSTRACT:The technical viability of using rice husk ashes (RHA) as alternative fillers in polypropylene was studied. Three types of RHA, white rice husk ash (WRHA), black rice husk ash (BRHA) and amorphous rice husk ash (AMRHA) at 10-40wt% filler loading were investigated. The RHA composites were compounded by twin screw compounders and the mechanical properties of the composites evaluated. Incorporation of the RHA fillers increased the flexural modulus of the composites, particularly the BRHA composities. Modulus of the RHA composites were found to be in good agreement with theoretical values predicted by equation of Lewis and Nielsen. The increase in modulus was offset by lowering of the tensile strength, elongation at break and impact properties. Theoretical treatments of the ultimate tensile strength performed based on the model proposed by Nicolai and Nicodemo showed reasonably good agreement. The mechanical properties of the RHA composites were of comparable values with the prepared polypropylene composites filled with commercial Neu burg silica. Transformation of the crystalline RHA to amorphous RHA resulted in composites with improved tensile strength. No coupling agent was used in this study.KEY WORDS Rice Husk Ash / Filler / Polypropylene / Composites / Mechanical Properties/ Incorporation of fillers into a polymer is known to cause substantial changes to the mechanical properties of the composities. As polymer composites are increasingly used in various mechanical applications, the mechanical properties are perhaps the most basic and important behaviors that need to be investigated in order to evaluate the performance of the composities when they are subjected to stress.term of modulus of elasticity, ultimate tensile strength, impact resistance, etc. The term mechanical is applied for this category of properties because they are often used to indicate the suitability of a material for use in mechanical applications, parts that carry a !oak, absorb shock, etc. 1 The principal objective of this study is to investigate the technical viability of using the rice husk ashes which are usually regarded as waste products as alternative low cost fillers in polypropylene. In this investigation, the mechanical properties of the polypropylene/ rice hush ash (RHA) composites are investigated in term of their modulus, tensile and impact properties. Modulus is a measure of The basic characterization of the mechanical properties are usually determined by tests resulting in various deformation versus stress dependencies, for instance the stressstrain diagrams. Examinations of such dependencies yield mechanical characteristics in * To whom correspondence should be addressed. 1002Mechanical Properties of RHA/PP Composites the stiffness of a material subjected to shear loading. Addition of filler normally improves the stiffness of the composities. Tensile test is among the most widely employed test method to characterize the mechanical properties of composites. From such a test, enomorous amount of important information m...

show abstract

“…The linear dependence between σ cb and φ b as depicted in Figure 14 follows Piggott and Leidner [16] relationship given by Equation (19):…”

Section: Abs/gb Compositesmentioning

confidence: 77%

Effect of temperature on tensile properties of injection moulded short glass fibre and glass bead filled ABS hybrids

Hashemi¹

2008

Express Polym. Lett.

View full text Add to dashboard Cite

Abstract. The present study investigated the effect of temperature on tensile strength and modulus of injection moulded ABS polymer reinforced with both short fibres (GF) and spherical glass beads (GB) over the temperature range 25 to 100°C. Tensile strength, σh and modulus, Eh, of ABS/GF/GB hybrids increased as volume fraction of the total glass in the hybrids increased. A linear increase in σh and Eh was found with increasing the hybrid ratio of the glass fibre, χf, over the entire temperature range studied. Results indicated that the tensile properties of the ABS/GF/GB hybrid composites at any temperature, T, can be estimated from the rule-of-hybrid-mixtures of the form Ph = Pcfχf + Pcb(1 -χf) where Pcf and Pcb are the tensile properties of the ABS/GF and ABS/GB composites at temperature T, respectively. It was found also that σh and Eh both decrease with increasing temperature in a linear manner. The rate at which σh and Eh decreased with temperature was dependent upon the hybrid ratio of the glass fibre, χf, and the total concentration of the glass in the hybrids.

show abstract

The strength of polymeric composites containing spherical fillers

Cited by 191 publications

References 0 publications

Mechanical and structural properties of melt spun polypropylene/nylon 6 alloy filaments

Mechanical and structural properties of melt spun polypropylene/nylon 6 alloy filaments

Mechanical Properties of Rice Husk Ash/Polypropylene Composites

Effect of temperature on tensile properties of injection moulded short glass fibre and glass bead filled ABS hybrids

Contact Info

Product

Resources

About