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Scratch Damage and Recovery of Controlled Epoxy Networks

Published online by Cambridge University Press:  01 February 2011

Hamed Lakrout ,
Aaron M. Forster ,
Lipiin Sung ,
Chris A. Michaels  and
Deborah Wang
Hamed Lakrout
Affiliation:
hlakrout@dow.com, Dow Chemical, New Products, Midland, Michigan, United States
Aaron M. Forster
Affiliation:
aaron.forster@nist.gov, NIST, Building & Fire Research Laboratory, Gaithersburg, Maryland, United States
Lipiin Sung
Affiliation:
lipiin@nist.gov, NIST, Building & Fire Research Laboratory, Gaithersburg, Maryland, United States
Chris A. Michaels
Affiliation:
chris.michaels@nist.gov, NIST, Chemical Science and Technology Laboratory, Gaithersburg, Maryland, United States
Deborah Wang
Affiliation:
deborah.wang@nist.gov, NIST, Building & Fire Research Laboratory, Gaithersburg, Maryland, United States
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Abstract

Surface scratches in a series of controlled epoxy networks (CEN) were measured using a combination of instrumented indentation protocols and laser scanning confocal microscopy. Identical epoxy chemistry with increasing molecular weight between crosslinks provided different viscoelastic relaxation behaviors with the same modulus at ambient conditions. The glass transition temperatures (Tg)ranged between 70°C and 117°C. The high Tg CEN exhibited the lowest penetration depth and the highest elastic recovery. The results are analyzed with respect to the macroscale bulk properties and underlying molecular architecture of the CEN materials.

Keywords

tribologyviscoelasticitypolymer
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1269: Symposium FF – Polymer Materials and Membranes for Energy Devices , 2010 , 1269-FF05-13
Copyright
Copyright © Materials Research Society 2010

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References

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