Compatible High Polymers: Poly(vinylidene fluoride) Blends with Homopolymers of Methyl and Ethyl Methacrylate

Mechanical study of poly(vinylidene fluoride)-poly(methyl methacrylate) amorphous blends

“…For this purpose fully homogeneous amorphous PVDF-PMMA blends were prepared. As is well known, these two polymers are compatible at high temperature [7]. It will be shown that although PVDF presents a Tg value well below room temperature and PMMA a Tg above room temperature, the Tg of the resulting amorphous blend lies always above room temperature according to the equation of Gordon and Taylor [8], a fact which has relevant implications for the yielding behaviour of the material.…”

PEO/CHCl3. Crystallinity of the Polymer and Vapor Pressure of the Solvent. Equilibrium and Nonequilibrium Phenomena

“…We have tested the necessity to correct for the imperfection of the gas 27 (taking the required substance specific parameters from the literature 28 ) and found that such influences can be neglected. For CHCl 3 we kept the column at 80 o C and that of the injector plus detector at 120 o C. The capillary column AT-WAX (Alltech Associates Inc., Deerfield, USA) had a length of 15 m, a diameter of 0,53 mm and a film thickness of 2,5 µm. In order to obtain reliable equilibrium data we have applied the method of Multiple Head-Space Extraction (MHSE) 29,30 .…”

“…Furthermore such systems offer an opportunity to learn more about the occurrence of nonequilibrium phenomena in mixtures containing crystallizable components. The freezing in of intermediate states during the 16.04.03 approach of equilibria is well documented for polymer blends of semi-crystalline and amorphous components in general [1][2][3][4][5][6][7][8][9][10][11][12][13] and with PEO as one component in particular [14][15][16][17][18][19] . Analogous investigations for the considerably less viscous solutions of such polymers (which should therefore be less prone to non-equilibria phenomena) are to our knowledge lacking.…”

Effect of PMMA on the morphology andα → β phase transition of oriented PVF2/PMMA blends

“…Blends of PVF2 with poly(methyl methacrylate) (PMMA) are known to be compatible in the amorphous state [1][2][3][4][5][6][7][8][9], with multiple crystal forms of PVF 2 appearing in the blends when they are crystallized [10, 111. Previously [12], utilized a special film drawing technique adopted from Petermann and Gohill [13] to produce highly oriented PVF2 films. These films were uniaxially deformed along the chain-axis direction and the ~ -~ fl phase transition studied as a function of applied strain.…”