Precision cutting of glassy polymers: influence of aging on the cutting process

Guido P.H. Gubbels; F. L. M. Delbressine; L. E. Govaert; Peter H.J. Schellekens

doi:10.1117/12.515412

26 February 2004 Precision cutting of glassy polymers: influence of aging on the cutting process

Guido P.H. Gubbels, F. L. M. Delbressine, L. E. Govaert, Peter H.J. Schellekens

Proceedings Volume 5252, Optical Fabrication, Testing, and Metrology; (2004) https://doi.org/10.1117/12.515412
Event: Optical Systems Design, 2003, St. Etienne, France

Abstract

This paper presents the results of an experimental study on the influence of aging on the cutting mechanics of glassy polymers. Polystyrene (PS), a glassy polymer, typically behaves brittle when subjected to a stress, it can be made ductile by rejuvenation. It was expected that PS would show a different cutting behaviour when it would be aged or rejuvenated. To investigate this two different molecular weight PS grades were used. Both aged and (mechanically) rejuvenated samples were made from each grade and cut. Cutting forces, chip morphology and surface quality were investigated. Although the chips showed no differences in brittleness and ductility, the measured cutting forces indicated that there is a difference between aged and rejuvenated PS. Also an interesting difference in cutting forces between the two PS grades was found. Investigation of the surface quality of the PS samples showed that the aged samples have smoother surfaces than the rejuvenated samples. It can be concluded that aging does have effect on the cutting mechanics and the obtained surface roughness.

Citation Download Citation

Guido P.H. Gubbels, F. L. M. Delbressine, L. E. Govaert, and Peter H.J. Schellekens "Precision cutting of glassy polymers: influence of aging on the cutting process", Proc. SPIE 5252, Optical Fabrication, Testing, and Metrology, (26 February 2004); https://doi.org/10.1117/12.515412

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