A theoretical approach to the thermochemistry of the polymerization of some derivatives of the monomers CH2X (X = CH2, NH, O)
β Scribed by Georges Leroy; Jean-Pierre Dewispelaere; Claude Wilante; Hanan Benkadour
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 481 KB
- Volume
- 6
- Category
- Article
- ISSN
- 1022-1344
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β¦ Synopsis
Abstract
In this work, we have calculated the thermodynamic parameters of the polymerization of some derivatives of the species CH~2~ο£ΎX (X = CH~2~, NH, O), using ab initio methods of quantum chemistry and the usual formalism of statistical thermodynamics. It is shown that the Gibbs functions Ξ__G__(l, c) corresponding to CH~2~ο£ΎNOCH~3~, CNCHο£ΎNCN, CF~2~ο£ΎO and all the percyano derivatives are largely positive which indicates that the spontaneous (radical or ionic) chain polymerization of these monomers is thermodynamically prohibited.
π SIMILAR VOLUMES
Excess molar volumes V E m of the ternary mixture {x1CH3(CH2)3OH+x2CH3(CH2)4CH3 + (1-x1-x2)CH3(CH2)3NH2} at the temperatures 298.15 K and 313.15 K, and the binary mixtures {xCH3(CH2)3OH + (1-x)CH3(CH2)3NH2}, {xCH3(CH2)4CH3 + (1-x)CH3(CH2)3NH2} at T=313.15 K have been determined from density measurem
## Abstract In this work, we have calculated the thermodynamic parameters of the first steps of the free radical and anionic polymerizations of various unsaturated monomers, using ab initio methods of quantum chemistry. The enthalpies and entropies of polymerization were estimated assuming that the
Vigo, Espana ΛΓ Ε½ Density and refractive index data in the binary mixtures xCH COOCH q 1 y 3 3 . Ε½ . Ε½ .4 Γ Ε½ . Ε½ . Ε½ .4 xCH CH C OH CH and xCH OH q 1 y x CH CH C OH CH , and the ternary 3 2 3 2 3 3 2 3 2 sented at T s 298.15 K over the whole range of mole fractions and atmospheric pressure. These
In this paper, the physical properties of densities and refractive indices have been measured and derived excess molar volumes and changes of refractive index on mixing have been calculated at T s 298.15 K and atmospheric pressure. Experimental values correspond to the Γ Ε½ . Ε½ . 4 ternary x CH COOCH