Rheological properties of chemically modified composite materials based on polyethylene

Kakhramanov, N. T.; Abbasov, A. M.; Алиев, А.М.; Buniyat-Zade, A.A.

doi:10.1007/bf00609654

Cited by 2 publications

(2 citation statements)

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“…Under stress conditions similar to those arising in the extrusion or pressure molding processes, the activation energy for viscous flow of systems with PMF is little different from that for the matrix [t63, 164,209,344,345]. This means that the "secondary" network of the material has been destroyed [69].…”

Section: Rheological Properties Of Composites With Polymerization-modmentioning

confidence: 97%

Filled polymers: Mechanical properties and processability

Enikolopyan

Fridman

Stal'nova

et al. 1990

Filled Polymers I Science and Technology

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In this review the wide spectrum of properties of filled polymer systems is generalized. Classical and modern conceptions dealing with the influence of the boundary layer and filler on melting and crystallization of the polymer matrix. Polymer properties in the melted and condensed state are considered, attention being given to the influence of the filler particle size and shape, the nature of its surface, its structure, and agglomeration on the theological and mechanical characteristics of composites.Data on structure and properties of filled thermoplastic composites are summarized for the first time. Special attention is paid to the peculiarities of composites with modified polymerized filler behavior during rheological and mechanical testing and processing of such composites. IntroductionPolymeric composite materials (PCM) belong to one of the most important classes of structural materials attracting ever growing interest, as manifested by the huge flow of published scientific and technical information dealing with the problems of developing, preparing, processing and using PCM [1]. Whereas the oil and gas fuel crisis has receded recently, the problem of their restrained use still remains an urgent one if only because the oil and gas reserves are not unlimited and practically non-reproducible. Estimates by specialists have shown [2,3] that the development of PCM with a view to cut the consumption of polymeric materials can only be economically feasible if not less than 15% by volume of the filler are added.Waste products from a number of commercial processes can be used as cheap and readily available fillers for PCM. For example, lightweight structural materials may be obtained by filling various low-viscous resins with waste materials [4,5]. Also by adding fillers to reprocessed polymers it is possible to improve their properties considerably and thus return them to service [6]. This method of waste utilization is not only economically feasible but also serves an ecological purpose, since it will help to protect the environment from contamination. The maximum percentage of the filler should in these cases be such as to assure reliable service of the article made from the PCM under specified conditions for a specified period of time.However, the chief purpose of introduction of fillers into PCM is to make possible the modification of polymers and thereby create materials with a prescribed set of physico-mechanical properties, and, obviously, the properties of filled materials may be controlled by, for example, varying the type of the base polymer (the "matrix") and filler, its particle size distribution and shape. It may not require a large quantity of filler [7]. Thanks to considerable advances in PCM research, their use in a broad range of industries -machine building, construction, aerospace technology, etc. -has become extensive [8][9][10][11].Development of an assortment of polymeric composite materials, decSsions concerning their possible scope of applicability and service conditions involve research in...

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Section: Rheological Properties Of Composites With Polymerization-modmentioning

confidence: 97%

Filled polymers: Mechanical properties and processability

Enikolopyan

Fridman

Stal'nova

et al. 1990

Filled Polymers I Science and Technology

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“…It was also demonstrated in works [14][15][16][17][18][19][20][21][22][23][24] that the length of the grafted chains of graft copolymers based on polyolefins and acrylic monomers has a selective impact on their structure and properties. Similar studies were also performed by us based on styrene plastics, where clear proof was obtained of the substantial role played by the size and sequential order of the grafted chains in shaping the structure and properties of graft copolymers [25][26][27][28].…”

Section: Resultsmentioning

confidence: 99%

Properties of Composite Materials Based on High-Impact Polystyrene

Kakhramanov

Alieva

Bagirova

2011

International Polymer Science and Technology

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In order to improve the physical and mechanical properties of specimens of high-impact polystyrene, a graft copolymer of atactic polypropylene with styrene was introduced into its composition. The graft copolymer is distinguished by the fact that there is no homopolymer of the monomer being grafted, i.e. polystyrene, in its composition. It was found that, depending on the length and distribution frequency of the grafted chains, the introduction of the graft copolymer helps to improve the breaking stress, bending strength and impact strength of the composite material.

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Rheological properties of chemically modified composite materials based on polyethylene

Cited by 2 publications

References 1 publication

Filled polymers: Mechanical properties and processability

Filled polymers: Mechanical properties and processability

Properties of Composite Materials Based on High-Impact Polystyrene

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