Improving the Quality of Gas-Filled Polymer Materials Based on Polypropylene by Sonication of their Melt During the Foaming Process

The currently observed development of medical science results from the constant search for innovative solutions to improve the health and quality of life of patients. Particular attention is focused on the design of a new generation of materials with a high degree of biocompatibility and tolerance towards the immune system. In addition, apart from biotolerance, it is important to ensure appropriate mechanical and technological properties of materials intended for intra-body applications. Knowledge of the above parameters becomes the basis for considerations related to the possibilities of choosing the appropriate polymer materials. The researchers' interest, as evidenced by the number of available publications, is attracted by nanobiocomposites based on chitosan and carbon nanotubes, which, due to their properties, enable integration with the tissues of the human body. Nanosystems can be used in many areas of medicine. They constitute an excellent base for use as dressing materials, as they exhibit antimicrobial properties. In addition, they can be carriers of drugs and biological macromolecules and can be used in gene therapy, tissue engineering, and construction of biosensors. For this reason, potential application areas of chitosan-carbon nanotube nanocomposites in medical sciences are presented in this publication, considering the characteristics of the system components.

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Assessment of quality of products from polymer materials for machine-building purposes

Journal of Physics Conference Series ◽

10.1088/1742-6596/1614/1/012044 ◽

2020 ◽

Vol 1614 ◽

pp. 012044

Author(s):

D Gramakov ◽

A Larchenko ◽

N Filippenko ◽

A Livshits ◽

D Bakanin ◽

...

Keyword(s):

Machine Building ◽

Polymer Materials ◽

Quality Of Products

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Evaluation of the suitability of synthetic polymer fuels in self-ignition engines

Combustion Engines ◽

10.19206/ce-2019-322 ◽

2019 ◽

Vol 178 (3) ◽

pp. 129-134

Author(s):

Oleh KLYUS ◽

Paweł KRAUSE ◽

Vladimir MARKOV ◽

Anna SKARBEK-ŻABKIN ◽

Bowen SA

Keyword(s):

Volume Fraction ◽

Synthetic Polymer ◽

Polymer Materials ◽

Physical Parameters ◽

Sauter Mean Diameter ◽

Synthetic Fuels ◽

Limit Values ◽

Experimental Part

The article presents a method for determining the quality of spraying a mixture of oil and synthetic fuels obtained from the pro-cessing of polymer materials. Laboratory tests of physical parameters of such a mixture were carried out, which made it possible to determine the limit values for the volume fraction of synthetic fuels. The method of determining the suitability of this type of fuel takes into account the criterion numbers Re and Oh, which include physical parameters such as viscosity, density, and surface tension. The experimental part concerning the distribution of droplets of injected fuel and determination of Sauter Mean Diameter using laser diffrac-tion confirmed the usefulness of the developed method for the assessment of the possibility of using a mixture of petroleum-based and synthetic fuels in self-ignition engines.

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STRENGTH AND DEFECTIVE FILLED POLYMER MATERIALS

Universum Technical sciences ◽

10.32743/unitech.2021.85.4-4.54-57 ◽

2021 ◽

Vol 85 (4-4) ◽

Author(s):

Ismail Fatoev ◽

Sardor Ismatov ◽

Bakhtiyor Aslonov

Keyword(s):

Polymer Materials ◽

Filled Polymer

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Short Carbon Fibers Composites With High Filler Contents Rheology and Mechanical Properties

10.1115/imece1999-1200 ◽

1999 ◽

Author(s):

Y. Schmitt ◽

C. Paulick ◽

Y. Bour ◽

F. X. Royer

Keyword(s):

Mechanical Properties ◽

Composite Materials ◽

Tensile Test ◽

Carbon Fibers ◽

Polymer Materials ◽

Complex Geometries ◽

Small Ratio ◽

The Matrix ◽

Short Carbon

Abstract The control of the quality of mixture based on very short carbon fibers and epoxyde resins leads to suitable mixture for molding of complex geometries. A gain in fluidity is obtained if the suspensions are treated by ultrasounds and simultaneously stirred under vacuum. Addition in a very small ratio of microbubbles in the mixture allows to obtain a viscosity less than those of the matrix alone. For many polymer materials the gain of fluidity can be of 20 to 25% with size and concentration of the microspheres thoroughly chosen. A certain number of new resins is developped to elaborate composite materials with specific mechanical properties close to standard aluminium. Tensile test an ultimate stress are used to quantify the improvements of the mechanical properties. Fillers concentrations up to 30 % are obtained.

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The Influence of the Use of Polymer Lining within the Roller Press Gravity Feeder on Briquette Quality

Polymers ◽

10.3390/polym12112489 ◽

2020 ◽

Vol 12 (11) ◽

pp. 2489

Author(s):

Michał Bembenek

Keyword(s):

Molecular Weight ◽

High Molecular Weight ◽

Material Flow ◽

Laboratory Tests ◽

Polymer Materials ◽

Roller Press ◽

Fine Grained ◽

The Impact ◽

Ultra High Molecular Weight

When considering the operation of roller presses for the consolidation of fine-grained materials, the main problems are disturbances in the proper flow of the material and its bridging in gravity feeders. This is especially true for small and medium capacity presses, where the hoppers for dosing the material are narrow. This article presents innovative laboratory tests of the impact of using a polymer plate lining in the gravity feeder of a roller press. Polymer materials Polyacetal C (POM C) and Ultra-High-Molecular-Weight Polyethylene (UHMW-PE) were used for the tests. The influence of the use of plates on the material flow and quality of briquettes was investigated in comparison with the case where such plates were not used. The research showed an improvement in the flow of fine-grained materials in the feeder and an increase of the briquette strength indexes, as compared to those cases when polymer linings were not used in the feeder.

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