Thermal and mechanical behavior of amorphous and semi-crystalline poly(vinylidene fluoride)/poly(methyl methacrylate) blends

2003 ◽  
Vol 198 (1) ◽  
pp. 103-116 ◽  
Author(s):  
Jlidi Jarray ◽  
Fadhel Ben Cheikh Larbi ◽  
Faustine Vanhulle ◽  
André Dubault ◽  
Jean Louis Halary
Keyword(s):  
Methyl Methacrylate ◽  
Mechanical Behavior ◽  
Vinylidene Fluoride ◽  
Poly Methyl Methacrylate ◽  
Poly Vinylidene Fluoride

Amorphous and Semicrystalline Blends of Poly(vinylidene fluoride) and Poly(methyl methacrylate): Characterization and Modeling of the Mechanical Behavior

2011 ◽  
Vol 134 (1) ◽  
Author(s):  
J. L. Halary ◽  
J. Jarray ◽  
M. Fatnassi ◽  
F. Ben Cheikh Larbi
Keyword(s):  
Glass Transition ◽  
Methyl Methacrylate ◽  
Mechanical Behavior ◽  
Vinylidene Fluoride ◽  
Degree Of Crystallinity ◽  
Poly Methyl Methacrylate ◽  
Strain Behavior ◽  
Blend Composition ◽  
Poly Vinylidene Fluoride ◽  
Reported Data

After extensive studies starting in the 1970s in relation to miscibility and piezoelectric properties, the blends of poly(vinylidene fluoride) (PVDF) and poly(methyl methacrylate) (PMMA) have been revisited with the aim of assessing their mechanical behavior. Depending on the amount of PVDF, either amorphous or semicrystalline blends are produced. Typically, the blends remain amorphous when their PVDF content does not exceed 40 wt. %. Blend composition influence on the values of the glass transition temperature, Tg, and on its mechanical expression, Tα, is extensively discussed. Then, emphasis is put on the stress-strain behavior in tension and compression over the low deformation range covering the elastic, anelastic, and viscoplastic response. The reported data depend, as expected, on temperature and strain rate and also, markedly, on blend composition and degree of crystallinity. Molecular arguments, based on the contribution of the glass transition motions are proposed to account for the observed behavior. Thanks to the understanding of phenomena at the molecular level, accurate models can be selected in the view of mechanical modeling.

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