Abstract
Specimens of poly(vinyl formal) (PVF) : poly(methyl methacrylate) (PMMA) polyblends with different weight percentage ratios were subjected to gamma irradiation (1 to 50 Mrad) and electron irradiation (1 to 20 Mrad). The effect of irradiation on the strength of the blend specimens was studied by measuring the surface microhardness using a Vickers microhardness tester attached to a Carl Zeiss NU 2 Universal research microscope. Significant changes were observed in the Vickers microhardness number, Hv. The Hv values of gamma irradiated specimens are found to be higher than the unirradiated specimens indicating an occurrence of radiational crosslinking. The maximum value of Hv is obtained at the gamma radiation dose of 15 Mrad. In case of electron irradiation the radiational crosslinking is found to take place for the blend specimens having lower wt% content of PMMA (0 and 1 wt%) in PVF matrix. On the other hand degradation of polymeric system is observed for the blends having PMMA content more than 1 wt‰ The maximum value of Hv is obtained for all the blend specimens at the electron irradiation dose of 8 Mrad. The degree of crosslinking in polyblends due to gamma irradiation is found to be more than electron irradiation. The scissioning mechanism is found to predominate in the polyblend system in case of electron irradiation.
Similar content being viewed by others
References
Agrawal Pragyesh, Bajpai R and Datt S C 1996Indian J. Pure Appl. Phys. 34 780
Bajpai R, Mishra V and Datt S C 1992Polym. Test. 11 387
Bajpai R, Agrawal Pragyesh and Datt S C 1994Polym. Int. 34 249
Bajpai R, Mishra V, Agrawal P and Datt S C 2002Bull. Mater. Sci. 25 21
Bopp C D and Sisman O 1955Nucleonics 13 28
Bradley R 1984Radiation technology handbook (New York and Basel: Marcel Dekker) p. 74
Charlesby A 1954Proc. R. Soc. A224 120
Charlesby A and Ross M 1954Proc. R. Soc. A223 393
Gonzalez A, Martin G J, De Saja J A and Rodriguez R 1986J. Appl. Polym. Sci. 31 717
Hermes H E and Higgins J S 1998Polym. Eng. Sci. 38 847
Hu J, Schulze U and Pionteck J 1999Polymer 40 5279
Jarvis N L, Fox R B and Zisman W A 1964Adv. Chem. Ser. (Washington DC: ACS) p. 317
McCarthy D W and Mark J E 1998Rubber Chem. Technol. 71 941
Mishra V, Bajpai R and Datt S C 1994Polym. Test. 13 435
Nagesh N, Dokhale P A and Bhoraskar V N 1999J. Phys. D: Appl. Phys. 32 1189
Pandey S, Bajpai R and Datt S C 1990Polym. Test. 10 111
Sisman O and Bopp C D 1954ORNL 928
Wang H, Zhang W and Sun J 1989J. Rad. Res. Rad. Proc. (China) 7 38
Zhang W, Wang H and Sun J 1991J. Macromol. Sci. Phys. B30 41
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Bajpai, R., Dhagat, N.B., Katare, R. et al. Development of hardened PVF : PMMA polyblend: effect of gamma and electron irradiation. Bull Mater Sci 26, 401–405 (2003). https://doi.org/10.1007/BF02711184
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF02711184