1st Edition

Relaxation in Physical and Mechanical Behavior of Polymers

By Maxim Arzhakov Copyright 2019
    174 Pages
    by CRC Press

    174 Pages
    by CRC Press

    Explores the nature of relaxation phenomena in polymers on the basis of time-temperature equivalence. Its role in the physical and mechanical behavior of polymers materials and fundamentals of thermoplastics processing are discussed. Four appendixes detail thermo-mechanical methods to study relaxation in polymers, structure of both amorphous and semi-crystalline polymers, and unified approach to describe deformation of polymeric materials.


    1. Viscoelasticity and relaxation 
     Mechanical models of a viscoelastic body
     Molecular–kinetic foundations of physico-mechanical behaviour of amorphous solids
     Viscoelasticity and relaxation properties of amorphous polymers
     The principle of temperature–time superposition

    2. Relaxation transitions in some polymers
       Amorphous polymers
       Relaxation ß-transition
       Relaxation a-transition and vitrification
       'Liquid–liquid' relaxation transition (ll-transition)
       On the relationship of ß-, a-, and ll-transitions
       Plasticized polymers
       Intrastructural (molecular) plastification
       Interstructural plasticization
       Semi-crystalline polymers

    3. The role of relaxation processes in phase transformations of polymers

    4. Relaxation aspects of plastic deformation of polymers
       Polymeric glass
       Semi-crystalline polymers

    5. Relaxation of deformed polymers 
       Relaxation of the latent energy of deformed polymer glasses
       Relaxation of the dimensions of deformed polymer glasses
       Physical ageing of deformed polymeric glasses

    6. The ‘brittleness–plasticity’ transition and the low-temperature boundary of plasticity of polymers

    7. Relaxation processes during processing of thermoplastic polymers
       Monolithization of powders in the P–T mode
       Monolithization of powders in the ¿–¿ mode



    Maxim Arzhakov, Moscow State University, Moscow, Russia