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Nano-indentation of Polycarbonate and Diamine Blends

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Nanoindentation of complex surfaces is of great interest from academic and industrial point of view. There are unique properties such as indentation effects resulting in strain softening and strain hardening. There is a differentiation in structure with the depth exhibited with variation of Tg. Hertzian and non-linear deformation models including usage of FEM offer opportunity in analyzing nano-indentation. Organic photoreceptors having compounds in Charge Transport Layer for improving charge acceptance and wider spectral sensitivity often results in short operating life from increased wear and scratch rates. Photoreceptor life has been found to be extended by doping polycarbonate with doped with polytetrafluoruethylene (PTFE) and/or silica. Presence of diamine (MTBD) in polycarbonate results in making the surface and bulk brittle and acts as an antiplasticizer by increasing it modulus and reducing yield stress (hardness) and strain to break. Data on modulus and hardness of polycarbonate and blends of diamine as function of depth (strain) and strain rate are presented and compared with models.

Document Type: Research Article

Publication date: January 1, 2011

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