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 90
... segment comprises several chain links , the segment length itself is , of course , already a statistical ( mean ) quantity . Determination of the shapes and sizes of the molecules in this segment model corresponds completely to the ...
... segment comprises several chain links , the segment length itself is , of course , already a statistical ( mean ) quantity . Determination of the shapes and sizes of the molecules in this segment model corresponds completely to the ...
Page 96
... segment model ( without doubt somewhat hypothetical but still very evident and definitely also powerful ) . - = - In the strictly one - dimensional segment model ( Fig . 6.3 ) , the segment vec- tors a ; can only assume two positions ...
... segment model ( without doubt somewhat hypothetical but still very evident and definitely also powerful ) . - = - In the strictly one - dimensional segment model ( Fig . 6.3 ) , the segment vec- tors a ; can only assume two positions ...
Page 103
... segment vectors a¡ , and their number n remain untouched ) . Corresponding to ( 6.87 ) , the contribu- tion of the deformed molecules to the entropy is then : s ( ĥx ) = k [ ln ( n ) - b2 ( λ2 h2 + λ2 h2 + λ2 h2 ) ] . For the mean value ...
... segment vectors a¡ , and their number n remain untouched ) . Corresponding to ( 6.87 ) , the contribu- tion of the deformed molecules to the entropy is then : s ( ĥx ) = k [ ln ( n ) - b2 ( λ2 h2 + λ2 h2 + λ2 h2 ) ] . For the mean value ...
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