Acta Innovations

5-12

Authors: Waldemar Studziński, Anna Karczmarek

The subject of this study is 2-phenylbenzimidazole-5-sulfonic acid (PBSA), which is one of 26 filters used for personal protection in the European Union. The aim of the study was to investigate the stability of 2- phenylbenzimidazole-5-sulfonic acid and its sodium salt under the influence of various agents. The study has shown that UV radiation, pH value, hydrogen peroxide are important factors limiting the stability of PBSA. The significance of the study is expanding the knowledge about the stability of PBSA.

21-28

Authors: Robert Cichowicz, Anna Lewandowska

The aim of the study was to analyze selected parameters of air in a room with a book collection taking into account the influence of components of mechanical ventilation on air flow, temperature and velocity distributions. The values of air parameters, obtained by numerical calculations in DesignBuilder, were compared with the recommended ranges. The temperature and air velocity in the cross-sections through the part of the room with the book resources were referred to the prescriptions and standards relating to the conditions in libraries. The parameters of air in the space for permanent stay of employees were compared with the guidelines corresponding to the conditions of thermal comfort.

38-46

Authors: Adam Gnatowski, Mateusz Chyra

Modification of polymer materials by various kinds of fillers is presently applied very often in massive production. This is due to the need for materials with better properties and lower prices for parts. One of the newest solutions is the filling of polymers with fly ash. This results in a change in products properties and reduction the amount of waste in the form of ashes. This article shows the results of investigations of thermomechanical properties of polyamide 6 modified by fly ash from the combustion of biomass. Comparative analysis of unfilled polyamide and polyamide composites with the addition of 5%, 10% and 15% of fly ash was performed. The specimens were obtained using injection moulding technology. The commercial name for the Polyamide 6 used in this study is TARNAMID T-27 and was manufactured by Zakłady Azotowe Tarnów. Fly ash manufactured by GDF Suez Energia Polska S.A. was applied as a filler. The investigations of mechanical properties were made using a harness by pressing ball method, impact strength by Charpy method and tensile strength. Differential scanning calorimetry (DSC), softening temperature by Vicat, and colour investigations were also performed. Pictures of microstructure were made.