Effect of modifier concentration on the fracture behaviour of rubber-modified PMMA

Shah, N.

doi:10.1007/bf00540504

Cited by 28 publications

(9 citation statements)

References 12 publications

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“…L* is the propagation distance after which the light beam has lost the memory of its initial direction. In the case of isotropic Rayleigh scatterers L* is equal to L, and for larger scatterers the relation between L* and L is similar to the persistence length of rigid polymers: L* = ~( 1 -(cos(8)))-1 (2) Several optical parameters of the medium depend on L*, for example the diffusion constant of the light, the transmitted intensity or the intensity distribution of the backscattered light around an illuminated spot. In anisotropic media L* becomes a tensor.…”

Section: Multiple Scattering Of Lightmentioning

confidence: 99%

“…The principle of using this type of particle is to combine two materials of high contrast from the mechanical view: a glassy (rigid and brittle) matrix with a rubbery (soft and resilient) inclusion. Although it has been empirically known for a long time which forms of microstructure optimize the impact properties (40% core-shell rubber particles of 200 nm diameter in the case of PMMA), the detailed damage mechanisms remain controversial (1)(2)(3)(4).…”

Section: Introductionmentioning

confidence: 99%

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Study of mechanical damage in rubber‐toughened poly(methyl methacrylate) by single and multiple scattering of light

Schirrer¹,

Lenke²,

Boudouaz³

1997

Polymer Engineering & Sci

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A s glassy polymers are usually somewhat brittle, several blending techniques are used to toughen these materials and to increase their impact strength. The microstructures of toughened polymers are complicated, as are their mechanical damage mechanisms. Moreover, these materials are mostly opalescent or even opaque, which renders difficult any optical investigation of the damage process. The scale of the damage generally ranges from nanometers to several micrometers, thus requiring a large panel of experimental techniques to investigate its microstructural evolution. When illuminated with a light beam, any non-perfectly transparent body will scatter light with a scattering pattern depending on the size, shape, and location of the microscopic light scatterers it contains. If the body is highly opaque, an incident light beam, if not absorbed, is scattered successively by several scatterers before emerging again at the front surface of the body. It has recently been shown that there is a coherent interference enhancement of the randomly multiple scattered light in a small angle range around the exact reverse direction of the incident light. This so-called coherent backscattering cone can be analyzed in terms of the size, shape and density of the scatterers. In this work, this technique is applied to a rubber-toughened PMMA containing core-shell (hard core) particles, a n initially transparent material that becomes progressively opaque during mechanical damage under stress. The damage mechanism within the rubber particles is compared with the size and shape of the light scatterers inferred from coherent backscattering and light transmission measurements.

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Section: Multiple Scattering Of Lightmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of mechanical damage in rubber‐toughened poly(methyl methacrylate) by single and multiple scattering of light

Schirrer¹,

Lenke²,

Boudouaz³

1997

Polymer Engineering & Sci

View full text Add to dashboard Cite

show abstract

“…The mechanisms of damage in such polymer blends have been intensively studied but are still controversial. [1][2][3][4] It is now admitted that in the case of pure rubber particles cavitation in the rubber precedes the appearance of microshear bands in the matrix. [5][6][7][8][9][10] Calculations demonstrate that shear stresses are almost vanishing in the particle and that cavitation occurs through a rise in negative hydrostatic pressure in the rubber.…”

Section: Introductionmentioning

confidence: 97%

Multiple light scattering and cavitation in two phase tough polymers

Géhant

Schirrer

1999

J. Polym. Sci. B Polym. Phys.

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“…21 The fracture toughness of industrial PMMA was substantially increased by introducing elastomeric particles into it. 22,23 Some authors applied this idea to acrylic bone cements. 24 Along this same line, the aim of the present work was to study the effect on the mechanical properties of mixing the elastomeric copolymer acrylonitrile-butadienestyrene (ABS) into a bone cement matrix.…”

Section: Introductionmentioning

confidence: 99%

Effect of porosity and environment on the mechanical behavior of acrylic bone cement modified with acrylonitrile-butadiene-styrene particles: I. Fracture toughness

Vilà

Ginebra

Gil

et al. 1999

J. Biomed. Mater. Res.

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The elastomeric copolymer acrylonitrile-butadiene-styrene (ABS) was added to a conventional acrylic bone cement matrix. The results obtained show that although strength and stiffness decreased with an increasing second phase volume fraction, ductility and toughness both increased. The crack propagation became stable for specimens containing over a 5% volume fraction of the second phase. The fracture toughness increased up to 60% when the amount of ABS reached 20% (v/v). For larger amounts linear elastic fracture mechanics techniques could not be used properly. The effects of porosity and environmental conditions on the mechanical behavior were also studied. The mechanisms that control the fracture process were investigated by means of scanning electron microscopy.

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Effect of modifier concentration on the fracture behaviour of rubber-modified PMMA

Cited by 28 publications

References 12 publications

Study of mechanical damage in rubber‐toughened poly(methyl methacrylate) by single and multiple scattering of light

Study of mechanical damage in rubber‐toughened poly(methyl methacrylate) by single and multiple scattering of light

Multiple light scattering and cavitation in two phase tough polymers

Effect of porosity and environment on the mechanical behavior of acrylic bone cement modified with acrylonitrile-butadiene-styrene particles: I. Fracture toughness

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