Papers - Archive

Nr 2/2016 - Abstracts

Elastomery nr 2/2016 cover

Monika Zielińska, Roger Seyger, Wilma K. Dierkes, Dariusz Bielinski, Jacques W.M. Noordermeer

Swelling of EPDM rubbers for oil-well applications as influenced by medium composition and temperature Part I. Literature and theoretical background

The paper describes the mechanism of interactions between hydrocarbon solvents and vulcanized rubber (representing crosslinked network structure). The problem is discussed from the point of view of thermodynamic principles of swelling, temperature and material factors affecting swelling of filled rubber vulcanizates, as well as the impact of swelling on properties of the materials. Special attention has been paid to the importance of models for the physical swelling of rubber in various hydrocarbons, which will provide a basis for prediction of swelling in their mixture like oils.
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Cezary Dębek

Influence of silanes on mechanical properties of SBS composites filled with montmorillonite intercalated by water soluble polymers

According to its own procedure, in aqueous suspension to give sodium montmorillonite intercalated yellow dextrin and plasticized with glycerol. The modified montmorillonite was used as a filler of SBS thermoplastic elastomer in an amount of 1, 2 and 4% by weight. The composites were compatibilized with silanes: 3-chloropropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, octadecyltrimethoxysilane. The mechanical properties of composites were examined and compared to composites not containing silanes. For all applied silanes found to be active, resulting in improved mechanical properties of the composites SBS with montmorillonite intercalated water-soluble polymer.
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Michał Lewandowski, Urszula Pawłowska

Prediction of stability of elastomers. Part I. Degradation of elastomers and prediction of lifetime

Factors affecting changes of physical properties of elastomers during storage and exploitation were described. A stability of elastomers and notions associated with it were defined - lifetime, storage life, service life. Estimated time and recommended conditions of storage of elastomeric products were also given. Methods of predicting the lifetime of elastomers using accelerated heat ageing: Arrhenius approach, time-temperature superposition, Williams-Landel-Ferry approach (WLF) were described.
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