Optical and Mechanical Properties of Nanostructured Polymers Induced by Ion Beam Irradiation

Optical and Mechanical Properties of Nanostructured Polymers Induced by Ion Beam Irradiation
Ar Ion beam; polymer; optical; mechanical; Nanostructure; Optical properties; Hardness
Issue Date
Second International Conference on Polymer Processing and Characterization
Ion beam irradiation has been extensively used for surface modification of polymers, glassy metals and amorphous and crystalline materials at micron and submicron scales. Also ion beam irradiation provides a unique way to change the chemical, structural, optical, geometrical and electrical properties of polymers by causing the irreversible modifications in structure and chemical composition. The surface structures created by exposure to an ion beam range from dots, steps and one-dimensional straight wrinkles to highly complex hierarchical undulations and ripples. In general, the morphology of these nanoscale features can be selected by controlling the ion beam parameters (e.g. fluence and acceleration voltage), making ion beam irradiation a promising method for the surface engineering of materials. In the work, we presented that ion beam irradiation results in creation of a foam-like nanostructure on polycarbonate and acrylonitrile butadiene styrene (PC/ABS) and peculiar nanoscale emboss-like structure as well as 3-D long nanofiber-like nanostructure on the surface of polypropylene. The role of broad Ar ion beam on the morphology of the structural features was investigated and insights into the mechanisms of formation of these nanoscale features were provided. Moreover, a systematic experimental study was performed to quantify the role of ion beam treatment time, and thus the morphology, on the optical properties and coefficient of friction of polymer surfaces covered by nanostructure. Nano-indentation experiment was performed on the ion beam treated surfaces which shows that the hardness as well as the elastic modulus decreased with increase of Ar ion beam treatment time. The decrease of hardness of polymer surfaces is explained in terms of surface structure as well as morphology changes induced by Ar ion beam treatment.
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