Dynamic properties of metal-filled epoxy polymers

Paipetis, S. A.; Papanicolaou, George; Theocaris, P. S.

doi:10.1016/0015-0568(75)90004-4

Cited by 45 publications

(22 citation statements)

References 17 publications

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“…However, the most interesting observation seems to be that the experimental values obtained from [31] corresponding to the composite system under investigation, almost coincide with the predictions derived from the parabolic mode of variation. However, with aluminium composites prepared in our laboratory, where, due to manufacturing conditions, considerable agglomeration of particles occurs [43], the respective experimental values lie well below most theoretical predictions. Moreover, in a pre-vious publication [44] it has been observed that the same composite system shows a decrease in TO as the filler volume fraction increases.…”

Section: Glass Transition Temperature and Determination Of The Thickncontrasting

confidence: 57%

A theoretical model for the prediction of thermal expansion behaviour of particulate composites

Sideridis

Papanicolaou

1988

Rheol Acta

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Abstract:The thermal expansion coefficient of particle-reinforced polymers was evaluated using a theoretical model which takes into account the adhesion efficiency between the inclusions and the matrix -an important factor affecting the thermomechanical properties of a composite. To measure the adhesion efficiency a boundary interphase, i.e. a layer between the matrix and the fillers having a structure and properties different from those of the constituent phases, was considered. This layer is assumed to have varying properties.To obtain information concerning the properties and extent of the interphase, an experimental study of the thermal behaviour of aluminium-epoxy composites was undertaken. Differential Scanning Calorimetry (DSC) measurements were performed to evaluate heat capacity with respect to temperature. In addition, the effects of different factors, such as heating rate and filler concentration on the glass transition temperature of the composite, were examined. The sudden changes in heat capacity values in the glass transition region were used to estimate the extent of the boundary interphase according to an existing theory.Finally, the values of the thermal expansion coefficient, predicted by this model, were compared with theoretical results obtained by other authors and with experimental results.

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Section: Glass Transition Temperature and Determination Of The Thickncontrasting

confidence: 57%

A theoretical model for the prediction of thermal expansion behaviour of particulate composites

Sideridis

Papanicolaou

1988

Rheol Acta

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“…The specimens were manufactured in the way presented in (4). The mechanical and thermal behaviour of these composite materials were investigated by the authors in previous publications (2,3,4). The properties of the constituent materials are given in table 1.…”

Section: Methodsmentioning

confidence: 99%

“…th exp ai =ac --ac [2] In order to derive expressions for the respective volume fractions we note that the new matrix-volume fraction vrn is equal to:…”

Section: Theoretical Considerationmentioning

confidence: 99%

“…Their theological behaviour has been extensively studied (5,6,7). Investigations of thermal and dynamic properties of particular metal-filled epoxies have been reported (2,4), while indentation studies of an epoxy resin filled with aluminium particles over a wide temperature range have been also given (3). The improvement achieved in the thermomechanical behaviour of an epoxy resin by reinforcing it with metal particles has been shown to depend on a number of factors (8) in addition to the filler content.…”

Section: Introductionmentioning

confidence: 97%

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Thermal properties and volume fraction of the boundary interphase in metal-filled epoxies

Papanicolaou

Theocaris

1979

Colloid Polymer Sci

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“…Five distinct filler concentrations (0%, 5%, 10%, 16%, 20%) were used, in order to study the effect of filler-volume fraction on the properties of the composites. The thermomechanical behaviour of the same composites was investigated by the authors in previous publications [12,13,[23][24][25][26][27].…”

Section: Materials and Testsmentioning

confidence: 99%

The effect of moisture absorption on the thermomechanical properties of particulates

Theocaris

Kontou

Papanicolaou

1983

Colloid & Polymer Sci

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Water absorption in particulate composites at ambient temperature influences their thermomechanical properties. Second Fick's law of diffusion was used in this paper to predict the diffusion coefficient of the composite materials tested. In all cases the matrix material was a diglycidyl ether of bisphenol-A polymer cured with 8 phr triethylene tetramine and filled with iron particles with an average diameter 150 ~tm at five distinct volume fractions vf = 0, 0.05, 0.10, 0.16 and 0.20. The modification of the modulus of elasticity, ultimate stress, breaking strain and breaking energy due to moisture absorption was examined. Moreover, differential scanning calorimetry was used to study the influence of the time exposure into water and the filler concentration of the particulates on their glass transition temperature. Finally, the void occupancy in the composite was evaluated from free volume considerations 9

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Dynamic properties of metal-filled epoxy polymers

Cited by 45 publications

References 17 publications

A theoretical model for the prediction of thermal expansion behaviour of particulate composites

A theoretical model for the prediction of thermal expansion behaviour of particulate composites

Thermal properties and volume fraction of the boundary interphase in metal-filled epoxies

The effect of moisture absorption on the thermomechanical properties of particulates

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