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Synthesis and Tribological Behaviors of Epoxy/Phosphazene‐Microspheres Coatings under Dry Sliding Condition
Author(s) -
Zhao Zhengping,
Ji Jianbing
Publication year - 2014
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201300491
Subject(s) - materials science , epoxy , composite material , composite number , polymer , tribology , microsphere , phosphazene , grinding , chemical engineering , engineering
Using precipitation, polymerization one step to synthesize poly[cyclotriphosphazene‐co‐(4,4′‐sulfonyldiphenol)] microspheres (PZs) with hexachlorocyclotriphosphazene and 4,4′‐sulfonyldiphenol, and filled epoxy matrix to prepare composite coatings to study the thermal and friction modified mechanisms. PZs have average particle diameter of 500 nm, the initial decomposition temperature is 457.5 °C and the solid residual rate at 600 °C is 63.1%. PZs uniformly dispersed in the epoxy matrix and effectively improve the T g and thermostability of the composite coatings. The frictional coefficient of the epoxy/PZs composite coatings reduced from 0.61 ± 0.02 of pure EP to a minimum 0.38 ± 0.01 and the volumetric wear rate reached a minimum 13.2 × 10 −11 mm 3 with 3 wt% PZs filling. The SEM morphology of grinding crack showed that PZs microspheres have an obvious wearing resistant effect.