Wyniki wyszukiwania - BazTech

1

Reuse of polyester-glass laminate waste in polymer composites

Chomiak M.

Journal of Achievements in Materials and Manufacturing Engineering

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2021

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Vol. 107, nr 2

49--58

EN

Purpose: of this paper is to develop a new generation of polymer composite materials that would ensure the use of residual and serious environmental problems of polyester-glass laminate waste. Design/methodology/approach: The glass reinforced polyester waste was ground and added to produce new composites. Thermoplastic - high impact polystyrene was selected for the composite matrix. Composites containing 10, 20, 30% by weight of the filler of polyester-glass laminate powder were made. The process of extrusion and subsequent injection was used to prepare the test samples. The influence of the filler on selected properties of composites was evaluated. The physical properties of the filler as well as the processing properties of the mixture as well as the mechanical properties - impact strength and tensile strength of the obtained composites were investigated. Findings: A decrease in tensile strength and impact strength was observed along with an increase in the amount of filler. Research limitations/implications: It would be interesting to carry out further analyzes, in particular with a higher volume fraction of the filler or with a different composite structure, e.g. using PVC as a matrix. The developed research topic is a good material for the preparation of publications of a practical and scientific nature, especially useful in the research and industrial environment. Practical implications: The shredded glass-polyester waste can be used as a filler of polystyrene, however, the resulting composite could be used to produce parts with slightly less responsible functions such as artificial jewelery or toy elements. Originality/value: Obtained results are a new solution a global waste management solution for glass reinforced polyester waste, which may contribute to the sustainable development of the composite materials industry through the partial utilization of waste composites with a duroplastic matrix.

2

Influence of graphite on electrical properties of polymeric composites

Szczepanik M., Stabik J., Łazarczyk M., Dybowska A.

Archives of Materials Science and Engineering

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2009

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Vol. 37, nr 1

37-44

EN

Purpose: of this work was to prepare polymeric composite materials with different contents of graphite and to search the influence of graphite on electrical properties of these materials. Design/methodology/approach : Five specimens were prepared using gravity casting method. Composites with epoxy resin as a matrix and with respectively 3, 6, 9 and 12%vol of graphite PV60/65 as a filler were cast. Surface resistivity was applied as a measure of electrical properties. The idea of the test was to define electrical resistivity in sequential layers with different content of conductive component (graphite). First, specimen's thickness was measured and electrical resistivity was tested. Next, outer layer was removed by grinding and electrical measurements performed. The procedure was repeated for all subsequent layers. In effect surface and volume resistivity dependence on depth of the layer was determined. Findings: The experimental results demonstrated that addition of conductive filler (graphite) to epoxy resin caused change of surface and volume resistivity of these materials. Research limitations/implications: Further investigations with higher carbon content and/or with different matrix are needed. Practical implications: Addition of 3-6%vol. of graphite to epoxy resin caused limited, almost linear, decrease of surface resistivity in depth direction of specimens. Higher content of filler (9-12%vol) in polymeric composite caused rapid, non-linear with layer depth, decrease of surface and volume resistivity. Originality/value: This paper is original because in the research programme gravitational casting was used to prepare polymeric composite materials with gradient of electrical properties.

3

Sposób na niskoenergochłonne otrzymywanie płyt konstrukcyjnych w recyklingu materiałowym tworzyw termoplastycznych

Polaczek J., Faron M.

Czasopismo Techniczne. Mechanika

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2006

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R. 103, z. 6-M

391-395

PL

W pracy zaprezentowano nową metodę wytwarzania płyt izolacyjnych z płatków odpadowego PET oraz lepiszcza na bazie PMMA i ABS. Rezultaty badań wskazują na możliwość zmniejszenia przenikalności wody poprzez płyty poprzez modyfikację lepiszcza.

EN

A new method for utilization different highly contaminated plastic waste was suggested. Against order of industry the research was carried on production waste containing PMMA, ABS and polyester glass laminate, which are by-products of plastic bathtubs production. The results of the research are long-term moisture resistant sheets resembling, in their appearance and properties, wood-derivative chipboards.