V K Vastal
Articles written in Bulletin of Materials Science
Volume 26 Issue 5 August 2003 pp 537-541 Polymers
Photoplastic effect in polycarbonate using microhardness measurements
R Bajpai Sandhya Sharma V K Vastal B P Chandra
Vickers microhardness indentation technique has been employed to detect the photoplastic effect in the transparent polycarbonate specimens in darkness and under mercury illumination. For low applied loads, the hardening of specimens under illumination confirms the positive photoplastic effect that causes illumination-induced increase of crosslinking (in polymer). For high applied loads the positive photoplastic effect decreases as the level of microhardness decreases.
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