A simple technique for determination of interphase properties in polymer nanocomposites reinforced with spherical nanoparticles

Zare, Yasser

doi:10.1016/j.polymer.2015.06.060

Cited by 67 publications

(39 citation statements)

References 35 publications

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“…One further reason is the development of strong interphase and interfacial interaction in the case of ND‐EDA. In order to quantify the role of interphase properties, modified Pukanszky model was used as follows:

σ_{normalu normalc} = σ_{normalu normalm} \frac{1 - φ^{2 true/ 3}}{1 + 2.5 φ^{2 true/ 3}} normalexp ((), B φ^{2 true/ 3})

where ϕ is the volume fraction of nanoparticles, σ uc and σ um are the tensile strength of composite and matrix, respectively, and B is the interfacial parameter which is defined as

B = ((), 1 + A_{c} ρ_{f} r_{i}) normalln ((), \frac{σ_{normalu normali}}{σ_{normalu normalm}})

where r i is the thickness of interphase, A c is the specific area of nanoparticles, taken to be 282 m 2 g −1 as reported by the manufacturer, and ρ f is the density of nanoparticles (3.05 g cm −3 ). Parameter σ ui is the interphase tensile strength calculated by modified Leidner and Woodhams model as:

σ_{normalu normali} = \frac{σ_{normalu normalc} - σ_{normalu normalm} - 0.48 σ_{normalu normalm} normalφ}{((), 1 + 1 true/ B) normalφ}

The values of all the parameters are available except r i .…”

Section: Resultsmentioning

confidence: 99%

Morphological and mechanical properties of polyamide 6/nanodiamond composites prepared by melt mixing: effect of surface functionality of nanodiamond

Karami

Shojaei

2016

Polymer International

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Surface chemistry of as‐received nanodiamond (ND) was first tailored by dry thermal oxidation to obtain carboxylated ND (ND‐COOH) and by wet chemistry to obtain ethylenediamine‐functionalized ND (ND‐EDA). Then, the surface‐functionalized ND particles were dispersed in polyamide 6 (PA6) using the melt‐mixing method. Transmission optical and scanning electron microscopies indicated a fine dispersion at low nanodiamond concentrations, e.g. 0.25 wt%, particularly with ND‐EDA. Differential scanning calorimetry revealed that ND‐EDA favoured the α‐phase crystal and enhanced the degree of crystallinity of PA6. Experimental data indicated that ND‐EDA had considerably improved tensile properties at low concentration of 0.25 wt% compared to ND‐COOH, which was correlated to the fine dispersion and stronger and thicker interphase in the case of ND‐EDA. It was also found that the toughness of PA6 was improved on incorporation of ND‐EDA due to development of microcracking and crazing. © 2016 Society of Chemical Industry

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σ_{normalu normalc} = σ_{normalu normalm} \frac{1 - φ^{2 true/ 3}}{1 + 2.5 φ^{2 true/ 3}} normalexp ((), B φ^{2 true/ 3})

where ϕ is the volume fraction of nanoparticles, σ uc and σ um are the tensile strength of composite and matrix, respectively, and B is the interfacial parameter which is defined as

B = ((), 1 + A_{c} ρ_{f} r_{i}) normalln ((), \frac{σ_{normalu normali}}{σ_{normalu normalm}})

σ_{normalu normali} = \frac{σ_{normalu normalc} - σ_{normalu normalm} - 0.48 σ_{normalu normalm} normalφ}{((), 1 + 1 true/ B) normalφ}

The values of all the parameters are available except r i .…”

Section: Resultsmentioning

confidence: 99%

Morphological and mechanical properties of polyamide 6/nanodiamond composites prepared by melt mixing: effect of surface functionality of nanodiamond

Karami

Shojaei

2016

Polymer International

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“…Many researchers have tried to characterize the interphase properties by modeling of the general properties of nanocomposites because the interphase is affected by many factors, and it cannot be characterized by simple techniques [14, 15]. The theoretical surveys in the recent years provided a large amount of information about interphase and interfacial interactions in polymer nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Dependence of Z Parameter for Tensile Strength of Multi-Layered Interphase in Polymer Nanocomposites to Material and Interphase Properties

Zare

Rhee

2017

Nanoscale Res Lett

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In this work, the Z interphase parameter which determines the tensile strength of interphase layers in polymer nanocomposites is presented as a function of various material and interphase properties. In this regard, the simple Pukanszky model for tensile strength of polymer nanocomposites is applied and the dependency of Z to different characteristics of constituents and interphase are illustrated by contour plots. The interphase strength (σ i) and B interfacial parameter in Pukanszky model show direct links with Z parameter. Also, it is found that the volume fractions of nanoparticles and interphase reveal dissimilar effects on Z. A high Z is obtained by a low nanoparticle volume fraction and high content of interphase, but the best values of Z are associated with the level of B parameter.

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“…It is well known that many factors related to nanofiller including volume fraction, aspect ratio, strength and dispersion quality as well as the properties of interfacial/interphase region between polymer matrix and dispersed particles such as thickness and strength significantly change the mechanical properties of CPN (Zare, 2015e;Zhu et al, 2011;Li et al, 2012;Garmabi, 2014a, 2014b;Zare, 2015c). The region around the clay is much important, because the chemical and physical properties of polymer matrix are largely changed in this area and the molecular interactions determine the efficiency of stress transfer through polymer to nanofiller.…”

Section: Introductionmentioning

confidence: 99%

A simple technique for determination of interphase properties in polymer nanocomposites reinforced with spherical nanoparticles

Cited by 67 publications

References 35 publications

Morphological and mechanical properties of polyamide 6/nanodiamond composites prepared by melt mixing: effect of surface functionality of nanodiamond

Morphological and mechanical properties of polyamide 6/nanodiamond composites prepared by melt mixing: effect of surface functionality of nanodiamond

Dependence of Z Parameter for Tensile Strength of Multi-Layered Interphase in Polymer Nanocomposites to Material and Interphase Properties

Estimation of material and interfacial/interphase properties in clay/polymer nanocomposites by yield strength data

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