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 88
... bonds ( valence angles ) is about 110 ° . As the single C - C - bond ( in contrast to the C = C- double bond ) is ... gauche - bonds g or g , respectively . These bond types enable the molecule to produce a multitude of relatively stable ...
... bonds ( valence angles ) is about 110 ° . As the single C - C - bond ( in contrast to the C = C- double bond ) is ... gauche - bonds g or g , respectively . These bond types enable the molecule to produce a multitude of relatively stable ...
Page 90
... gauche - bond ; Aɛg = ɛg - εt ) . For the probability of finding a gauche - bond , one obtains P. = g ng = 1 . = 1 - P1 = n 2 eεg / kT + 2 ( 6.46 ) g If there is no energetic difference between the trans- and gauche - bonds , i . e ...
... gauche - bond ; Aɛg = ɛg - εt ) . For the probability of finding a gauche - bond , one obtains P. = g ng = 1 . = 1 - P1 = n 2 eεg / kT + 2 ( 6.46 ) g If there is no energetic difference between the trans- and gauche - bonds , i . e ...
Page 104
... gauche - bond in an ensemble of densely packed polymer molecules basically requires a cooperative process which can ... bonds . If trans- and gauche - bonds are separated by a given energy gap △ , this leads to the problem of the so ...
... gauche - bond in an ensemble of densely packed polymer molecules basically requires a cooperative process which can ... bonds . If trans- and gauche - bonds are separated by a given energy gap △ , this leads to the problem of the so ...
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according addition approximation assume becomes bending boundary branch chain molecules coefficients completely components condition const constant contribution corresponding crystal degrees of freedom dependent described determined differential direction effect elastic energy enthalpy entropy equal equation example forces frequency fundamental equation further Gibbs given heat capacity Hence holds homogeneous ideal increasing independent individual interaction internal degrees internal equilibrium internal variable lattice lattice units leads linear macroscopic mass mass points mean mechanical melting mixture modes mole molecular molecules N₁ non-equilibrium obtains partial perturbation phase polymer position possible potential pressure probability processes pure quantities range referred regard relation relaxation respect response functions Sect segment simple so-called solution specific stable stress substances temperature theory thermal thermodynamics tion transition valid variables vector volume waves әт др