Autor: R. Dejanović, Mladen Bravar, Jasenka Jelenčić, Marica Mlinac-Mišak
Rok vydání: 1990
Předmět:
Zdroj: Angewandte Makromolekulare Chemie. 176:105-112
ISSN: 1522-9505
0003-3146
DOI: 10.1002/apmc.1990.051760109
Popis: A commercial type of impact-resistant polystyrene was investigated. Two types of antioxidants, Irganox 245 and Irganox PS-800 were added to polystyrene in ammounts of 0,05 to 0.20%. Films, dumbbells and straight test pieces were subjected to thermal and u.v. ageing. Films of 250 μ thickness were thermally treated at 100°C and separately u.v. irradiated at 360 nm for 24, 72, 120 and 168 hours. Dumbbells and straight test pieces were only thermally aged at 100°C for 7, 14, 21, 28 and 35 days. Mechanical properties were determined. The spectra of samples were recorded using Perkin-Elmer, model 1750 FTIR and Perkin-Elmer data station 7700. Colour changes of all dumbbells were measured using Elrepho apparatus in u.v.-visible region. (Changes of the content of carbonyl and hydroxyl groups, as well as of polybutadiene (PB) unsaturation in films were recorded on i.r. spektrophotometer Perkin-Elmer 257 between 4000 and 625 cm−1 and were published in the first part of this study1).
Databáze: OpenAIRE
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