Frictional dissipation of polymeric solids vs interfacial glass transition
Soft Condensed Matter
2007-05-23 v1
Abstract
We present single contact friction experiments between a glassy polymer and smooth silica substrates grafted with alkylsilane layers of different coverage densities and morphologies. This allows us to adjust the polymer/substrate interaction strength. We find that, when going from weak to strong interaction, the response of the interfacial junction where shear localizes evolves from that of a highly viscous threshold fluid to that of a plastically deformed glassy solid. This we analyse as resulting from an interaction-induced ``interfacial glass transition'' helped by pressure.
Keywords
Cite
@article{arxiv.cond-mat/0607477,
title = {Frictional dissipation of polymeric solids vs interfacial glass transition},
author = {Lionel Bureau and Christiane Caroli and Tristan Baumberger},
journal= {arXiv preprint arXiv:cond-mat/0607477},
year = {2007}
}