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Structural Theories of Polymer Relaxation Behaviour - NBCM062

Title:	Strukturní teorie relaxačního chování polymerů
Guaranteed by:	Department of Macromolecular Physics (32-KMF)
Faculty:	Faculty of Mathematics and Physics
Actual:	from 2020
Semester:	winter
E-Credits:	3
Hours per week, examination:	winter s.:2/0, Ex [HT]
Capacity:	unlimited
Min. number of students:	unlimited
4EU+:	no
Virtual mobility / capacity:	no
State of the course:	taught
Language:	Czech
Teaching methods:	full-time

Guarantor:	doc. RNDr. Lenka Hanyková, Dr.
Teacher(s):	doc. RNDr. Jaromír Fähnrich, CSc.
Classification:	Physics > Biophysics and Chemical Physics

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Annotation -

The explanation of the models of relaxation behaviour of polymers. The interpretation of the experimental results obtained from different relaxation methods.

Last update: T_KMF (03.05.2002)

Course completion requirements -

Oral exam.

Last update: Búryová Marcela (13.06.2019)

Literature - Czech

[1] Ferry, J.D.: Viscoelastic Properties of Polymers. J. Wiley, N.Y. 1961

[2] McCrum, N.G., Read B.E., Williams, G.: Anelastic and Dielectric Effects in Polymeric Solids. J. Wiley, N. Y. 1967

[3] Slonim, I.Ja., Ljubimov, A.N.: JaMR v polymerach. Chimija,Moskva 1966

[4] Mathias, L.J. In: Solid State NMR of Polymers. Plenum Press, N.Y.-London 1991

[5] Grosberg, A.Ju., Chochlov, A.R.: Statističeskaja fizika makromolekul Nauka, Moskva 1989

Last update: Zakouřil Pavel, RNDr., Ph.D. (05.08.2002)

Requirements to the exam -

Oral exam.

Last update: Búryová Marcela (13.06.2019)

Syllabus -

1. Experimental methods for studying relaxation processes (viscoelastic, dielectric, NMR). Relations between macrocscopic characteristics and micropysical description of the system. Relaxation times, autocorrelation function, spectral density, correlation time.

2. Models for molecular motions: rotational diffusion model, Debye formula. Coil model of a polymer chain, Rouse model, hydrodynamic interactions,

Zimm model. Entanglements, reptation model. Models starting with crystalline ordering, bundle model, kinks, meander model.

3. Temperature dependence of relaxation behaviour. Arrhenius formula, model with jumps over the potential barrier. Free volume model, WLF equation. Adams-Gibbs theory. Temperature dependence of relaxation times for the meander model.

4. Glass temperature, relaxation processes in the glassy state, physical ageing. Order parameters, Kovacs' theory (both one- and multiparameter one).

Last update: T_KMF (29.04.2004)