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Surface Modification of Silica with Ultrahighmolecular Weight Polyethylene (UHMWPE)

Published online by Cambridge University Press:  11 February 2011

Subir Debnath ,
Jiang Ding ,
Stephanie L. Wunder  and
George R. Baran
Subir Debnath
Affiliation:
Department of Chemistry, 13th and Norris Street, Temple University, Philadelphia, PA 19122, U.S.A.
Jiang Ding
Affiliation:
Department of Chemistry, 13th and Norris Street, Temple University, Philadelphia, PA 19122, U.S.A.
Stephanie L. Wunder
Affiliation:
Department of Chemistry, 13th and Norris Street, Temple University, Philadelphia, PA 19122, U.S.A.
George R. Baran
Affiliation:
College of Engineering, 1947 N. 12th Street, Temple University, Philadelphia, PA 19122, U.S.A.
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Abstract

UHMWPE (Ultrahighmolecular Weight Polyethylene) was attached to silica using a two step process, in which the first step involves silanating the silica surface with a 0.5–1.2 mole % vinyltrimethoxysilane-ethylene copolymer (PE-silane), and in which the UHMWPE (Mw = 3–6 × 106) is solution coated onto the silanated silica in the second step. Glass beads (3.6 μm diameter) were cleaned using distilled water or refluxed with 5% aqueous Na2S2O8, to remove metallic surface contaminants, were used for UHMWPE attachments. SEM and optical microscopy showed individual particles. TGA (thermogravimetric analysis) studies confirmed the attachments as well as their stability after attachment. The integrity of the coatings was examined by SEM following treatment with HF, which left thin “skins” of polymer remaining. Both washing methodologies for the glass beads provided similar UHMWPE coatings. Bend bars (10) prepared using UHMWPE coated beads show no adverse drop in moduli and strength.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 750: Symposium Y – Surface Engineering 2002–Synthesis, Characterization and Applications , 2002 , Y8.17
Copyright
Copyright © Materials Research Society 2003

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References

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