Phase Transitions in Polymers: The Role of Metastable States

Stephen Z.D. Cheng (Author)

9780444519115

Hardback, published 17 July 2008

324 pages
24 x 16.5 x 2.4 cm, 0.75 kg

A classical metastable state possesses a local free energy minimum at infinite sizes, but not a global one. This concept is phase size independent. We have studied a number of experimental results and proposed a new concept that there exists a wide range of metastable states in polymers on different length scales where their metastability is critically determined by the phase size and dimensionality. Metastable states are also observed in phase transformations that are kinetically impeded on the pathway to thermodynamic equilibrium. This was illustrated in structural and morphological investigations of crystallization and mesophase transitions, liquid-liquid phase separation, vitrification and gel formation, as well as combinations of these transformation processes. The phase behaviours in polymers are thus dominated by interlinks of metastable states on different length scales. This concept successfully explains many experimental observations and provides a new way to connect different aspects of polymer physics.

Foreword. Preface. 1. Introduction. 2. Thermodynamics and kinetics of phase transitions. 3. Concepts of metastable states. 4. Metastable states in phase transitions of polymers. 5. Metastable states observed due to phase transformation kinetics in polymers. 6. Interdependence of metastable states on different length scales in polymers. 7. Outlook - A Personal View. Index.

Subject Areas: Materials science [TGM], Mechanical engineering & materials [TG], Thermochemistry & chemical thermodynamics [PNRW], Physical chemistry [PNR], Polymer chemistry [PNNP], Spectrum analysis, spectrochemistry, mass spectrometry [PNFS], Chemistry [PN], Thermodynamics & heat [PHH], Condensed matter physics [liquid state & solid state physics PHFC]