Regulating microstructures of interpenetrating polyurethane-epoxy networks towards high-performance water-lubricated bearing materials

Structural evolution and mechanical properties of polyurethane/epoxy interpenetration networks (PU/EP IPNs) as a function of PU content were comprehensively studied. In particular, tribological behaviors of the IPNs were investigated in water medium while varying lubrication regimes. Our results dem...

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Bibliographic Details
Published in:Tribology international 2019-03, Vol.131, p.454-464
Main Authors: Yu, Ping, Li, Guitao, Zhang, Ligang, Zhao, Fuyan, Chen, Shoubing, Dmitriev, Andrey I., Zhang, Ga
Format: Article
Language:English
Subjects:
Bearing materials
Boundary lubrication
Interpenetrating networks
Lubrication
Mechanical properties
Polyurethane resins
Polyurethane/epoxy interpenetration networks
Tribological properties
Tribology
Water lubrication
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Summary:Structural evolution and mechanical properties of polyurethane/epoxy interpenetration networks (PU/EP IPNs) as a function of PU content were comprehensively studied. In particular, tribological behaviors of the IPNs were investigated in water medium while varying lubrication regimes. Our results demonstrate that microstructures of PU/EP IPNs are closely dependent on stoichiometric proportions of their components. It is impressive that unlike conventionally modified polymers, blending 30 wt% PU into EP leads to simultaneous improvement in modulus, strength and ductility. Especially for sliding subjected to boundary lubrication, IPNs exhibited strikingly enhanced tribological performance when compared to neat EP and PU. Our work indicates that IPNs have a high application potential as tribo-materials exposed to water lubrication. [Display omitted] •Structure and mechanical properties of PU/EP IPNs as a function of PU content were comprehensively studied.•Microstructures of PU/EP IPNs show close dependence on stoichiometric proportion of the components.•Blending 30% PU into EP improved simultaneously the modulus, tensile and impact strengths, ductility.•3PU/7EP IPNs and 5PU/5EP IPNs exhibited excellent tribological performance in the boundary lubrication regime.•IPNs with regulated microstructures show a high potential for using as tribo-materials in water lubrication conditions.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2018.11.010