Radiation induced effects on the microhardness measurements of poly(methyl methacrylate): poly (vinylidene fluoride) polyblends

Solution-mixed poly(methyl methacrylate) (PMMA): poly(vinylidene fluoride) (PVDF) polyblends with different weight percentage ratios were irradiated with various doses of gamma irradiation (1–100 Mrad). The effect of irradiation on the strength of blend specimens was studied by measuring the surface...

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Bibliographic Details
Published in:Polymer testing 1994, Vol.13 (5), p.435-440
Main Authors: Mishra, Vibhu, Bajpai, R., Datt, S.C.
Format: Article
Language:English
Subjects:
Applied sciences
Blends
Exact sciences and technology
Forms of application and semi-finished materials
Polymer industry, paints, wood
Technology of polymers
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Summary:Solution-mixed poly(methyl methacrylate) (PMMA): poly(vinylidene fluoride) (PVDF) polyblends with different weight percentage ratios were irradiated with various doses of gamma irradiation (1–100 Mrad). The effect of irradiation on the strength of blend specimens was studied by measuring the surface microhardness using a Vickers microhardness tester attached to a Carl Zeiss NU-2 Universal research microscope. The irradiation was found to produce hardening in the blend specimens; however, the degree of hardening depends upon the dose level, testing conditions and also on the miscibility of PMMA and PVDF in the blend specimens. The increase and decrease in microhardness has been explained on the basis of crosslinking and scissioning. The two limits of irradiation dose were 1 and 75 Mrad where significant changes in mechanical strength were observed.
ISSN:0142-9418
1873-2348
DOI:10.1016/0142-9418(94)90052-3