Grażyna Janowska
University of Łódź
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Grażyna Janowska.
Journal of Thermal Analysis and Calorimetry | 2012
Przemysław Rybiński; Grażyna Janowska; Małgorzata Anna Jóźwiak; Agnieszka Pająk
This article presents a procedure of the activation of halloysite and a method of the synthesis of nucleus-sheath type filler. The effects of the nanoadditives obtained on the thermal properties, flammabilities and fire hazards of peroxide and sulfur vulcanizates of NBR and SBR rubbers, are discussed. Based on the test results obtained by derivatography, oxygen index, FAA micro-calorimeter and cone calorimeter, the thermal stability, flammability, and fire hazard of the nanocomposites investigated were determined. The results obtained were interpreted from the point of view of the chemical structure of the diene elastomers investigated, their spatial network structure, and the method of halloysite modification.
Journal of Thermal Analysis and Calorimetry | 2012
Przemysław Rybiński; Grażyna Janowska; Małgorzata Anna Jóźwiak; Agnieszka Pająk
This paper presents the effect of halloysite intercalated with a base or modified montmorillonite on the thermal properties and flammability of peroxide and sulfur vulcanizates of styrene–butadiene rubber (SBR). Based on the test results obtained by means of thermal analyses (DTA, TG, DTG, and DSC), oxygen index and microcalorimeter (FAA) it has been found that the thermal stability and flammability of the nanocomposites investigated depend on the spatial network structure as well as the content and type of nanoadditive in the vulcanizate obtained. The nanofillers used considerably reduce the flammability and fire hazard of the cross-linked SBR.
Journal of Thermal Analysis and Calorimetry | 2012
Przemysław Rybiński; Grażyna Janowska; Agnieszka Kucharska-Jastrząbek; Agnieszka Pająk; Iwona Wójcik; Dorota Wesolek; Krzysztof Bujnowicz
This article discusses the effect of the cross-linking of diene elastomers (BR, SBR, NBR), with the use of an organic peroxide or sulfur, on their flammability and fire hazard. Flammability tests were carried out by the method of oxygen index, combustion time (in air) and ignition temperature measurements. Fire hazard was determined on the basis of test results obtained by means of a cone calorimeter. Toxicometric coefficients (
Journal of Thermal Analysis and Calorimetry | 2013
Przemysław Rybiński; Grażyna Janowska
Journal of Thermal Analysis and Calorimetry | 2013
Przemysław Rybiński; Grażyna Janowska; Małgorzata Anna Jóźwiak; Marek Jóźwiak
{\text{RTFH}}_{{{\text{co}}/{\text{co}}_{ 2} }}
Journal of Thermal Analysis and Calorimetry | 2012
M. Prochoń; Grażyna Janowska; A. Przepiórkowska; A. Kucharska-Jastrzabek
Journal of Thermal Analysis and Calorimetry | 2014
Przemysław Rybiński; Grażyna Janowska
and WLC50SM) and the emission of polycyclic aromatic hydrocarbons (PAH) were determined. Test results were interpreted from the point of view of the chemical constitution of elastomer macromolecules as well as the structure of its network structure.
Polymer Science Series B | 2014
Przemysław Rybiński; Agnieszka Kucharska-Jastrząbek; Grażyna Janowska
This paper presents a method of modification of halloysite with the use of aqueous solutions of halogens and an alcoholic solution of boric acid. The effect of modified nanoadditives on the thermal properties, flammability, and fire hazard of peroxide and sulfur vulcanizates of butadiene–acrylonitrile (NBR) and butadiene–styrene (SBR) rubbers was described and assessed. The test results obtained by spectrometric methods, oxygen index, and cone calorimeter were interpreted from the point of view of the chemical structure of the investigated diene elastomers and the particular method of halloysite modification. The analysis of values obtained by the method of cone calorimetry it confirms that most NBR and SBR vulcanizates filled with modified halloysite are more resistant to fire when compared with material without modification. In addition, the modified halloysite are crucial in making self-extinguishing elastomeric materials.
Journal of Thermal Analysis and Calorimetry | 1988
Grażyna Janowska; T. Janczak; L. Ślusarski
The article presents the effect of attapulgite (ATT) and its synergic action with carbon or silica on the thermal properties and flammability of cross-linked styrene–butadiene rubber. It has been shown that ATT is active filler improving the thermal and mechanical properties of composites containing this aluminosilicate. The decreased flammability of vulcanizates containing ATT compared to that of unfilled vulcanizates results from good insulating properties of the ATT used. The considerable reduction in the flammability of composites containing ATT and carbon nanofiber or silica is connected, first of all, with the formation of a homogeneous boundary layer.
Journal of Thermal Analysis and Calorimetry | 1990
Grażyna Janowska; T. Janczak
The article describes the measurements results of the influence of waste keratin on the properties of cross-linked styrene-butadiene rubber especially taking its thermal properties and flammability into consideration. The biopolymer used was thoroughly examined by means of derivatography, elementary analysis, FTIR spectroscopy, Zetasizer nano S90, and Zetasizer 2000. It has been found that the presence of protein facilitates the cross-linking of the elastomer investigated and the elastomeric-protein materials are characterized by good thermal and mechanical properties as well as a considerably increased resistance to thermooxidative aging. Under the influence of keratin, the flammability of the composites obtained is decreased.