Measuring the mechanical properties of ground ophthalmic polymer surfaces using nanoindentation

De Pellegrin, Dennis (2012) Measuring the mechanical properties of ground ophthalmic polymer surfaces using nanoindentation. In AMPT 2012 15th International Conference on Advances in Materials and Processing Technologies, 23-26 September 2012, Wollongong, NSW.

Abstract

This work is motivated by the need to efficiently machine the edges of ophthalmic polymer lenses for mounting in spectacle or instrument frames. The polymer materials used are required to have suitable optical characteristics such high refractive index and Abbe number, combined with low density and high scratch and impact resistance. Edge surface finish is an important aesthetic consideration; its quality is governed by the material removal operation and the physical properties of the material being processed. The wear behaviour of polymer materials is not as straightforward as for other materials due to their molecular and structural complexity, not to mention their time-dependent properties. Four commercial ophthalmic polymers have been studied in this work using nanoindentation techniques which are evaluated as tools for probing surface mechanical properties in order to better understand the grinding response of polymer materials.

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ID Code: 61824
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
Keywords: Nanoindentation, Ophthalmic polymer, Scratching, Wear, Grinding
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MANUFACTURING ENGINEERING (091000) > Machining (091004)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Polymers and Plastics (091209)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Tribology (091309)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 [Please consult the author]
Deposited On: 14 Aug 2013 23:38
Last Modified: 20 Mar 2014 23:54

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