Surface enrichment of siloxanes with covalent bound ultraviolet (UV) absorber groups

Autor:	K. Rühlmann, Irene Jansen, Kornelia Dittmar, Holger Friedrich
Rok vydání:	1994
Předmět:	chemistry.chemical_classification Materials science Polymers and Plastics Analytical chemistry Polymer medicine.disease_cause Electron spectroscopy Contact angle chemistry.chemical_compound chemistry Sputtering Siloxane Materials Chemistry medicine Polystyrene Surface layer Ultraviolet
Zdroj:	Journal of Inorganic and Organometallic Polymers. 4:155-170
ISSN:	1572-8870 1053-0495
DOI:	10.1007/bf01036540
Popis:	The ability of siloxanes with UV absorber groups to enrich at the surface of cast polystyrene films was studied. Model compounds were siloxanes of the type Me3SiO(SiMe2O) n (SiMeRO) m SiMe3, withR representing a 2-hydroxy-benzophenone-4-oxypropyl group. Surface studies were carried out by contactangle measurements and ESCA (Electron Spectroscopy for Chemical Application) investigations. UV absorbers with a high content of dimethylsiloxane units strongly enrich at the surface of polystyrene, forming a thin surface layer with a high siloxane content. UV absorbers with few or no dimethylsiloxane units pe hydroxybenzophenone group are evenly distributed in the polymer matrix. ESCA sputter depth profiles are also given. Migration studies show that the siloxanes are delivered from the bulk to the surface subsequently after sputtering.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8fef91e960848d00b66a9a6a3eddc850 https://doi.org/10.1007/bf01036540 Zobrazit plný text záznamu Full text from SpringerLink