Thermophysics of Polymers I: Theoryhere, Herbert Baur provides a simple description of the theory of thermophysics of polymers. In order to illustrate the theoretical skeleton, he only treats the simple, easily comprehensible problems of polymer physics, yet, in detail. The main points covered are: thermally excited conformation isomery of polymers; phonon gas of ideal polymer crystals; the dissipative thermo-mechanical behaviour of polymers, new aspects of viscoelastic behavior, glass transistion, and crystallization. |
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Page 1
... mechanical properties of a gas are essentially dependent upon its entropy . Their explanation is , therefore , mainly a thermodynamic problem . Entropy can also have a major influence on the mechanical properties of polymers . The best ...
... mechanical properties of a gas are essentially dependent upon its entropy . Their explanation is , therefore , mainly a thermodynamic problem . Entropy can also have a major influence on the mechanical properties of polymers . The best ...
Page 132
... mechanical parti- tion function Q of the individual harmonic oscillators the geometric progres- sion ∞ Qk = Σ e - hwx ( n + 1 ) / RT ∞ = e - ħwx / 2RT Σ ( e ̄hwx / RT ) n = e- -ħwk / 2 RT = n = 0 n = 0 1- e - ħwk / RT ( 6.164 ) and as ...
... mechanical parti- tion function Q of the individual harmonic oscillators the geometric progres- sion ∞ Qk = Σ e - hwx ( n + 1 ) / RT ∞ = e - ħwx / 2RT Σ ( e ̄hwx / RT ) n = e- -ħwk / 2 RT = n = 0 n = 0 1- e - ħwk / RT ( 6.164 ) and as ...
Page 198
... mechanical equilibrium with respect to the external variables ( see Sect . 4.1 ) . In order to maintain homogeneity , the system must be capable of ad- justing its thermal and mechanical equilibrium to all changes practically in ...
... mechanical equilibrium with respect to the external variables ( see Sect . 4.1 ) . In order to maintain homogeneity , the system must be capable of ad- justing its thermal and mechanical equilibrium to all changes practically in ...
Contents
Equilibrium and Stability Conditions | 20 |
Homogeneous Mixtures | 27 |
2 | 33 |
Copyright | |
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Common terms and phrases
according arrested equilibrium bending modes branch Bravais lattice Brillouin zone chain molecules chemical potentials coefficient of thermal conformational isomers const constant corresponding crystalline curve Debye Debye relaxation degrees of freedom density dependent differential dispersion relation elastic enthalpy entropy equilibrium position equilibrium thermodynamics extensive quantities free energy free enthalpy frequency G-representation gauche-bonds Gibbs function Gibbs fundamental equation group velocity heat capacity Hence homogeneous interaction intermolecular internal energy internal equilibrium internal variable lamella lattice units leads linear chain liquid M₁ mass points mechanical melting mixture modulus mole number molecular N₁ N₂ non-equilibrium obtains perturbation phase phonons polymer crystal pressure processes quantities quasi-elastic relaxation relevant internal degrees respect response functions Sect segment so-called stretching modes T₁ temperature thermal expansion tion v₁ valid vector vibrations volume wave number x₁ Σ Σ ат др эт