Can I read Structural Effect of Nitrogen Plasma-based Ion Implantation on Ultra-high Molecular Weight Polyethylene on EtoBox?

Structural Effect of Nitrogen Plasma-based Ion Implantation on Ultra-high Molecular Weight Polyethylene by K.G Kostov; M Ueda; I.H Tan; N.F Leite; A.F Beloto; G.F Gomes is a Engineering article available to read on EtoBox.

What is Structural Effect of Nitrogen Plasma-based Ion Implantation on Ultra-high Molecular Weight Polyethylene about?

Surface modification of ultra-high molecular weight polyethylene (UHMWPE) has been explored by using the non-line-of-sight plasma immersion ion implantation (PIII) technique. The polymer specimens, immersed in nitrogen plasma, were pulsed through a metallic grid at repetition rate of 100 Hz with negative high-voltage pulse of 15 kV magnitude and 10 As duration. The UHMWPE's structural changes induced by the PIII were analyzed by laser Raman spectroscopy (LRS) at 514.5 nm, X-ray photoelectron spectroscopy (XPS) and optical microscopy. From the Raman spectra it is observed that the chain structure of UHMWPE has been damaged due to ion bombardment and a layer of hydrogenated amorphous carbon is formed. The ratio of sp 3 /sp 2 bonded carbon in the modified layer was obtained by suitable fitting of the XPS C 1s energy peak, using a four-curve fitting procedure, which recognizes a portion of C -O and CMO surface bonding. The XPS results for N 1s peak show that the implanted nitrogen ions form chemical bonds with the polymer instead of forming precipitates by self-clustering.

Who reads Structural Effect of Nitrogen Plasma-based Ion Implantation on Ultra-high Molecular Weight Polyethylene?

Author

K.G Kostov; M Ueda; I.H Tan; N.F Leite; A.F Beloto; G.F Gomes

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0257-8972)

Published

2004

Language

EN

Field

Engineering (Physical Sciences)