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Notch Sensitivity of Polycarbonate and Toughened Polycarbonate by Kilwon Cho; JaeHo Yang; Byung Il; Kang Chan; Eon Park is a Materials Science article available to read on EtoBox.

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## Abstract Notch sensitivity, the effect of a notch radius on the impact behavior of polycarbonate and rubber‐toughened polycarbonate, is investigated by using a model based on the slip‐lines field theory. Impact strength, determined by the Charpy impact test, was found to increase drastically with an increasing notch radius for pure polycarbonate, whereas the increase of impact strength with increased notch radius was not as extreme for rubber‐toughened polycarbonate. These results indicate that the inclusion of rubber particles reduces notch sensitivity. An examination of fracture surfaces reveals that cracks were initiated by internal crazing at some distance from the notch tip for specimens with blunt notches. For pure polycarbonate, the impact strength is found to have a linear relationship with the square of the notch radius, which is in good agreement with that predicted by the proposed model. However, for rubber‐toughened polycarbonate, the linear relationship broke down as the notch radius increased due to the enhanced toughening effect. The proposed model can be applied to clearly explain the notch sensitivity of ductile polymers which exhibit large plastic yielding arou

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Author

Kilwon Cho; JaeHo Yang; Byung Il; Kang Chan; Eon Park

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0021-8995)

Published

2003

Language

EN

Field

Materials Science (Physical Sciences)