Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2008-05-01

Journal: JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY

Included Journals: SCIE、EI

Volume: 46

Issue: 2

Page Number: 208-216

ISSN: 0928-0707

Key Words: thin films; high performance polymers; polymer hybrid; phthalazinone

Abstract: Organic-inorganic poly(phthalazinone ether ketone) (PPEK)/SiO(2) hybrid composite thin films were prepared by the dip-coating method on pre-cleaned glass substrates. The covalent bonds between organic and inorganic phases were introduced by an in-situ O-acylation reaction of isocyanatopropyltriethoxysilane (ICPTES) with the borohydride-reduced PPEK forming a polymer bearing triethoxysilyl groups. Theses groups were subsequently hydrolyzed with tetraethoxysilane (TEOS) and allowed to form a network via a sol-gel process. The polymer hybrid composite exhibited good thermal stability and a higher glass transition temperature as compared with the pure resin. Atomic force microscope, water contact angle measurement and scanning electron microscope were used to characterize the polymer hybrid thin films. The tribological experiment showed that the films have very low friction coefficient (about 0.1) and good anti-wear properties, without failure even after sliding for 18,000 s under modest loads. The improved tribological properties of the modified substrate were attributed to good adherence of PPEK/SiO(2) hybrid films on the substrate and synergy of both PPEK matrix and silica particles.