The effect of particle shape on the mechanical properties of filled polymers

Chow, T. S.

doi:10.1007/bf00550613

Cited by 173 publications

(73 citation statements)

References 57 publications

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“…(9), was applied more rigorously to short fiber composites. 22 The results from this equation are shown in Table IV. However, there is a high deviation from the experimental values due to the nature of the Halpin-Tsai theory, which is mostly used for short fiber composites.…”

Section: Static Mechanical Propertiesmentioning

confidence: 95%

The effect of fiber concentration on mechanical and thermal properties of fiber‐reinforced polypropylene composites

Houshyar

Shanks

Hodzic

2005

J of Applied Polymer Sci

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A novel composite material consisting of polypropylene (PP) fibers in a random poly(propylene-coethylene) (PPE) matrix was prepared and its properties were evaluated. The thermal and mechanical properties of PP-PPE composites were studied by dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC) with reference to the fiber concentration. Although, by increasing PP fiber concentration in PPE, no significant difference was found in melting and crystallization temperatures of the PPE, the storage, and the tensile and flexural modulus of the composites increased linearly with fiber concentrations up to 50%, 1.5, 1.0, 1.3 GPa, respectively, which was approximately four times higher than that for the pure PPE. There is a shift in glass transition temperature of the composite with increasing fiber concentration in the composite and the damping peak became flatter, which indicates the effectiveness of fiber-matrix interaction. A higher concentration of long fibers (Ͼ50% w/w) resulted in fiber packing problems, difficulty in dispersion, and an increase in void content, which led to a reduction in modulus. Cox-Krenchel and Haplin-Tsai equations were used to predict tensile modulus of random fiber-reinforced composites. A ColeCole analysis was performed to understand the phase behavior of the composites. A master curve was constructed based on time-temperature superposition (TTS) by using data over the temperature range from Ϫ50 to 90°C, which allowed for the prediction of very long and short time behavior of the composite.

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Section: Static Mechanical Propertiesmentioning

confidence: 95%

The effect of fiber concentration on mechanical and thermal properties of fiber‐reinforced polypropylene composites

Houshyar

Shanks

Hodzic

2005

J of Applied Polymer Sci

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“…[4][5][6][7][8]). Depending on the nature of the filler and the gel matrix two extreme cases can be distinguished: a) No interaction between the gel matrix and the dispersed particles; at small deformations this results in a decrease in gel modulus with increasing volume fraction of filler.…”

Section: Introductionmentioning

confidence: 99%

Rheological properties of filled gels. Influence of filler matrix interaction

Vliet

1988

Colloid & Polymer Sci

293

233

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Abstract:The dynamic moduli of gels filled with particles have been studied as a function of the volume fraction of dispersed particles COi (0-0.4) and of the way in which they interact with the gel matrix. Two gels of different nature were studied, viz. polyvinyl alcohol (PVA) -Congo red gels (a so-called rubber gel) and casein gels made by acidification of skimmed milk. Emulsion droplets stabilized by different macromolecules have been used as dispersed particles. If there was no interaction between the macromolecules adsorbed on the particles and the gel matrix, both the filled PVA and the filled casein gels showed a small decrease in the elastic moduli with COt, approaching the behaviour theoretically predicted for foams. In the case of interaction, the results for filled PVA gels roughly fitted the theoretical predictions, if the deformability of the emulsion droplets and the formation of an intermediate layer between the dispersed particles and the gel matrix was taken into account. The increase in the elastic modufi of the acid milk gels with C0t was much greater than expected and was probably due to aggregation of the dispersed particles during gelation.

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“…Most are based on an assumption of complete binding between the continuous and dispersed phases. A review of these models was compiled by Chow (1980). Simple models of food systems usually consist of more than two phases with water usually being the predominant phase.…”

Section: Theoretical Modelsmentioning

confidence: 99%

Rheological Properties of Gellan Gels Containing Filler Particles

Jampen¹,

Britt²,

Yada³

et al. 2001

Journal of Food Science

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: Influences of rigid (glass) and deformable (gellan) particles dispersed in gellan gels were studied to better understand the effect of structure on the rheological properties of model composite foods. Composites with inclusions at 0%, 10%, 20%, and 30% volume fractions (VF) were tested under small deformation oscillatory shear. In gels containing rigid particles, the dynamic shear storage modulus (G′) decreased initially, exhibited a minimum around 20% VF, then increased at 30% VF behavior that was attributed to physical interactions among particles. In gels containing deformable particles, the linear decrease in G′ with increasing VF may be due to particle compliance under stress or to particle separation from the matrix, thereby causing gel weakening.

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The effect of particle shape on the mechanical properties of filled polymers

Cited by 173 publications

References 57 publications

The effect of fiber concentration on mechanical and thermal properties of fiber‐reinforced polypropylene composites

The effect of fiber concentration on mechanical and thermal properties of fiber‐reinforced polypropylene composites

Rheological properties of filled gels. Influence of filler matrix interaction

Rheological Properties of Gellan Gels Containing Filler Particles

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