Acid–base interactions and covalent bonding at a fiber–matrix interface: contribution to the work of adhesion and measured adhesion strength

Pisanova, E. V.; Mäder, Edith

doi:10.1163/156856100742681

Cited by 76 publications

(34 citation statements)

References 43 publications

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“…It depends on the type and strength of the interaction and values from 10 Å to several microns have been reported in the literature for the most diverse systems [52,135,[199][200][201][202][203][204][205][206][207][208]. Since interphase thickness is calculated or deduced indirectly from measured quantities, it depends also on the method of determination.…”

Section: Interphase Formationmentioning

confidence: 99%

Particulate Fillers in Thermoplastics

Móczó

Pukánszky

2017

Fillers for Polymer Applications

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The characteristics of particulate filled thermoplastics are determined by four factors: component properties, composition, structure and interfacial interactions. The most important filler characteristics are particle size, size distribution, specific surface area and particle shape, while the main matrix property is stiffness. Segregation, aggregation and the orientation of anisotropic particles determine structure. Interfacial interactions lead to the formation of a stiff interphase considerably influencing properties. Interactions are changed by surface modification, which must be always system specific and selected according to its 2 goal. Under the effect of external load inhomogeneous stress distribution develops around heterogeneities, which initiate local micromechanical deformation processes determining the macroscopic properties of the composites. INTRODUCTUIONParticulate filled polymers are used in very large quantities in all kinds of applications. The total consumption of fillers in Europe alone is currently estimated as 4.8 million tons (Table 1) [6]. In spite of the overwhelming interest in nanocomposites, biomaterials and natural fiber reinforced composites, considerable research and development is done on particulate filled polymers even today. The reason for the continuing interest in traditional composites lays, among others, in the changed role of particulate fillers. In the early days fillers were added to the polymer to decrease price.However, the ever increasing technical and aesthetical requirements as well as soaring material and compounding costs require the utilization of all possible advantages of fillers.Fillers increase stiffness and heat deflection temperature, decrease shrinkage and improve the appearance of the composites [9][10][11][12][13]. Productivity can be also increased in most thermoplastic processing technologies due to their decreased specific heat and increased heat conductivity [9,10,[14][15][16][17]. Fillers are very often introduced into the polymer to create new functional properties not possessed by the matrix polymer at all like flame retardancy or conductivity [18][19][20][21]. Another reason for the considerable research activity is that new fillers and reinforcements emerge continuously among others layered silicates [7,[22][23][24][25][26][27][28][29], wood flour [30][31][32][33][34][35][36][37], sepiolite [38][39][40][41][42][43][44][45][46][47][48][49], etc.The properties of all heterogeneous polymer systems are determined by the same four factors: component properties, composition, structure and interfacial interactions [9,50]. Although certain fillers and reinforcements including layered silicates, other nanofillers, or natural fibers possess special characteristics, the effect of these four factors is universal and valid for all particulate filled materials. As a consequence, in this paper 3 we focus our attention on them and discuss the most important theoretical and practical aspects of composite preparation and use accordingly. The general rules of h...

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Section: Interphase Formationmentioning

confidence: 99%

Particulate Fillers in Thermoplastics

Móczó

Pukánszky

2017

Fillers for Polymer Applications

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“…This behavior can be attributed to the formation of covalent bonding between the silane treated carbon fiber and the epoxy resin, which enhances the interphase strength [23]. On the other hand, the incorporation of the polysulfone has two main effects: it decreases the surface energy and raises the viscosity of the 3.1.1.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Effect of fiber-matrix adhesion on the fracture behavior of a carbon fiber reinforced thermoplastic-modified epoxy matrix

Kim¹,

Álvarez-Castillo²,

Valadez-González³

et al. 2016

Carbon letters

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In this study, the fracture behavior of a thermoplastic-modified epoxy resin reinforced with continuous carbon fibers for two levels of fiber-matrix adhesion was performed. A carbon fiber with commercial sizing was used and also treated with a known silane, (3-glycidoxy propyl trimethoxysilane) coupling agent. Toughness was determined using the double cantilever test, together with surface analysis after failure using scanning electron microscope. The presence of polysulfone particles improved the fracture behavior of the composite, but fiber-matrix adhesion seemed to play a very important role in the performance of the composite material. There appeared to be a synergy between the matrix modifier and the fibermatrix adhesion coupling agent.

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“…Fowkes hypothesized that, to first order, the surface energy of a material can be expressed as the sum of contributions from the dispersive and dipole-dipole forces described earlier. This is often written as [7] …”

Section: A Work Of Adhesionmentioning

confidence: 99%

“…Parameters for the acidity and basicity of surfaces are also obtained from wetting experiments or inverse gas chromatography [7] and can be used to calculate values for W a−b .…”

Section: A Work Of Adhesionmentioning

confidence: 99%