Surface activation of polyetheretherketone (PEEK) and formation of calcium phosphate coatings by precipitation

Plasma activation of polyetheretherketone (PEEK) surfaces and the influence on coating formation in a supersaturated calcium phosphate solution was investigated in this study. It was observed that plasma treatment in a N2/O2 plasma had a significant effect on the wettability of the PEEK surface. The contact angle decreased from 85° to 25° after plasma treatment. Cell culture testing with osteoblastic cell lines showed plasma activation not to be disadvantageous to cell viability. X-ray photoelectron spectroscopy (XPS) analysis was performed to characterize the chemical composition of the PEEK surfaces. It was observed that the O1s intensity increased with plasma activation time. At the C1s peak the appearance of a shoulder at higher binding energies was observed. Coating of PEEK was performed in a supersaturated calcium phosphate solution. Coating thicknesses of up to 50 μm were achieved after 24 days of immersion. Plasma activation followed by nucleation in a highly saturated hydroxyapatite solution had a positive effect on the growth rate of the layer on PEEK. Chemical analysis revealed that the coating consists of a carbonate-containing calcium phosphat

Bewitterung von Kunststoffen in der Automobilindustrie. Weiterbildungs- und Technologie-Forum Zertifizierte Aus- und Weiterbildung nach DIN EN ISO 9001. Fachtagung

Available from TIB Hannover: F99B499 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

6. Fachtagung: Bewitterung und Alterung von Kunststoffen in der Automobilindustrie

The following plenary lectures were given at the 6th conference on weathering and aging of plastics in car applications: Fundamentals of climate-caused aging of polymer materials (P.Trubiroha); Aging behavior of ABS and related materials (N.Niesser); Material development with polypropylene for outside applications in automobiles (B.Stangenberg); Aging behavior of PUR for car interior applications (M.Templin, H.Malz); Stablilizer systems and preparation methods from the viewpoint of the additive deliverer (A.Lichtblau); Lacquered plastic parts in car building (H.Stegen, M.Mass); Influence of weathering on scratch resistance of automobile coatings (A.Geburtig); Technology and application areas of modern devices and plants for accelerated weathering (D.Kockott); New accelerated weathering devices with xenon arc irradiation (G.Pausch); Comparison of sundry automobile standards for artificial weathering (T.Franz); Weathering of car interior parts. Requirements and correlation to PV 1303 (P.Schwarzer); Aging tests and glazings (M.Kriegel-Gemmecke); Sun-light simulation plant for aging tests (H.F.Stahl); Quality guarantee with accelerated weathering tests (T.Raabe).SIGLEAvailable from TIB Hannover: F03B164 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Fachtagung: Bewitterung von Kunststoffen im Fahrzeugbau Zertifiziert nach DIN EN ISO 9001

Available from TIB Hannover: F01B882+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Bestimmung des Vernetzungszustandes von Metallklebstoffen ueber die Aenderung des elektrischen Widerstandes

With 44 refs.Copy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Beurteilung des Langzeitverhaltens der Fuegenaehte von Kunststoff-Dichtungsbahnen zur Basis- und Oberflaechenabdichtung bei Deponien Schlussbericht

Using PE (Vestolen A 3512 R) - sheetings of 2 mm and 3 mm thickness, the applicability of conventional short-time tests for evaluation of weld seam quality were evaluated. It is demonstrated that current short-line tests provide no reliable data. A long-time stress reference test at elevated temperatures is proposed as a practice-relevant accelerated life test. First relationships between welding parameters, geometrical parameters and reference test results are compiled. Criteria are given for the evaluation of seam quality. (WEN)SIGLEAvailable from TIB Hannover: F94B0495+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman

Surface activation of polyetheretherketone (PEEK) and formation of calcium phosphate coatings by precipitation

ISSN:0957-4530ISSN:1573-483