Instytut Inzynierii Materialow Polimerowych i Barwnikow

Toruń, Poland

Instytut Inzynierii Materialow Polimerowych i Barwnikow

Toruń, Poland
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Stasiek A.,Instytut Inzynierii Materialow Polimerowych i Barwnikow | lubkowski D.,Instytut Inzynierii Materialow Polimerowych i Barwnikow
Przemysl Chemiczny | Year: 2017

A review, with 30 refs.


Polyhexamethylene guanidynȩ (PHMG) derivatives-contg. polylactide films (concn. 0.2-1.0% by mass) were exposed on action of seawater at 20°C for 7 days to study their biodegradability by detn. of BOD by microorganisms present in the water by a std. method. The addn. of PHMG resulted in deterioration of barrier properties of the film but did not affect the susceptibility to biodegrdn. except for the addn. of PHMG p-aminbenzenesulfonate where the biodegrdn. was obsd.


Nisaplin or natamax-contg. films (concns. 0.2-1% by mass) were treated with compost ext. at 20°C for 7 days to det. the permeabilities of H2O vapor and O2 through the films before and after their degrdn. by std. methods. The addn. of bacteriocides resulted in improving the barrier properties. The permeablity decreased after film degrdn.


Patent
Technical University of Lodz, AGH University of Science, Technology and Instytut Inzynierii Materialow Polimerowych I Barwnikow | Date: 2014-06-11

The invention solves the problem of application of the hybrid systems MgOSiO_(2)/multiwalled olygomeric sisesquioxanes as promoters of ceramization in the silicone composites destined for covers of electrical cables. The systems are composed of magnesium silicate and from 0.1 to 50 weight parts, favourably 10 weight parts, of the silsesquioxanes containing R_(1) - R_(8), where R_(1) to R_(8) is alkyl-group and/or groups, or alkoxy-, or methacryloxy-, or glycidoxy-, or amino-, or vinyl-, or perfluoro- or their mixture, used for its modification.


Patent
AGH University of Science, Technology and Instytut Inzynierii Materialow Polimerowych I Barwnikow | Date: 2014-09-17

Ceramizable silicone composition destined for covers of electrical cables composed of silicone rubber containing methyl(vinyl)silicone elastomer, pyrogenic silica of the specific surface 120 - 380 m^(2)/g, the mineral phase containing wollastonite and one from the group of other fillers like: quartz, magnesium oxide or titanium oxide, platinum catalyst and a peroxide curing agent. The composite mixes characterize themselves by the content of 100 weight parts of methyl(vinyl)silicone elastomer of density 1.081 - 1.193 g/cm^(3), having molecular weight of 400,000 - 740,000 and vinyl groups content of 0.01 - 0.5 %, 0.5 - 10 weight parts of low molecular weight , - di(hydroxyl)siloxane, 22 - 55 weight parts of pyrogenic silica and 18 - 55 weight parts of the mineral phase being either wollastonite or its mixture with quartz, in which wollastonite content exceeds 20 weight % of the whole composite mix, and the amount of platinum catalyst is 10 - 250 ppm, recalculated for pure platinum.


Zenkiewicz M.,University Kazimierza Wielkiego | Rytlewski P.,University Kazimierza Wielkiego | Malinowski R.,Instytut Inzynierii Materialow Polimerowych i Barwnikow
Polimery/Polymers | Year: 2011

This paper constitutes a comprehensive review of the literature on the application of low-temperature plasma for the modification of the surface layers (SL) of polymeric materials (Figs 1-3, Table 1). The main objectives for modification of these materials have been discussed and a short description of the basic methods of modification has been presented. The principles of low-temperature plasma and the way in which it influences selected properties of the surfaces of polymers have also been evaluated. The application of low-temperature plasma generated under atmospheric or reduced pressures in some selected modification methods with special consideration of the corona discharge method in air has been presented (Figs 4-11).


Stepczynska M.,University Kazimierza Wielkiego | Zenkiewicz M.,Instytut Inzynierii Materialow Polimerowych i Barwnikow
Przemysl Chemiczny | Year: 2011

Surface layer of polylactid films (thickness 100 μm) was treated with corona discharge in air or in He to improve their adhesive properties. Changes of the chem. structure of the corona-treated layers was studied by photoelectron spectroscopy to det. the oxidn. degree. The He atm. used was more efficient than the air one.


Stepczynska M.,University Kazimierza Wielkiego | Zenkiewicz M.,Instytut Inzynierii Materialow Polimerowych i Barwnikow
Przemysl Chemiczny | Year: 2010

Surface layer of com. polylactide (PLA) was modified with corona discharges and studied for contact angle (H2O, CH2J2) and the geometric structure (at. force microscopy). The surface free energy was caled, by using Owens-Wendt equation. The treatment resulted in a decrease in the contact angle and an Increase in the surface free energy of the PLA film.


Fundamentals on the measurement of the zeta potential for polymeric materials were given. Methods for studying solid surfaces and detn. of the zeta potential at the interface polymer/electrolyte soln. were reviewed.


Original and waste polyethylene (PE), polystyrene (PS) and their blends (85:15 and 15:85) were processed by optional mech. grinding, then granulation in lab. and com. extruders and finally by injection molding to prep, the test samples. The viscosity of PE wastes decreased during the grinding and increased during extrusion (also in the blends) in contrary to PS wastes.

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