Chain relaxation capability , plastics

Brostow W. The Chain Relaxation Capability. Ch. 5. In performance of Plastics. Ed. W. Brostow, Hanser, Munich-Cincinnati, 2000. 

Sufficient free volume is essential for these processes. An increase in Vf results in an increase in the number of conformational changes in the chains enhancing the chain relaxation capability (CRC) (Brostow and Macip 1989 Doolittle 1951 Akinay et al. 2001). Brostow and Macip (1989) defined CRC as the amount of external energy dissipated by a relaxation process in a unit of time and unit mass of the polymer. The excess energy that cannot be dissipated by relaxational processes can go into destructive processes (irreversible changes in response to an applied force and/or temperature such as bond fracture and plastic deformation). The theory of the chain relaxation capability is discussed in detail in several references (Akinay et al. 2002 Brostow and Kubat 1996 Brostow 2000 Brostow et al. 2000 Brostow et al. 1999a, b). 

Brostow, W. (2000), Chain Relaxation Capability in Performance of Plastics, Hanser/ Gardner, Munich/Cincinnati, Chapter 5. 

---