ABSTRACT
This chapter presents a well-founded hypotheses to constitute a convincing base for all subsequent reasonings, a theoretical analysis of the non-elastic deformation of solid amorphous polymers. It shows how it is possible to distinguish high temperature-low stress mechanisms from those occurring at low temperature-high stress. The chapter distinguishes that wherein diffusive phenomena play an important role and secondly, that wherein may neglect these diffusive phenomena. It considers low stresses as then simplifications will be possible, leading to sufficiently general results for their useful application. The chapter focuses on the effect of high stresses, such that it leads to problems of plasticity at low temperatures of solid amorphous polymers. It discusses that local changes, induced by shear stress applied on the model assembly, corresponded to the appearance of localised shearings appearing at the dislocation loops. The chapter explains the macroscopic deformation as being the consequence of annihilation of the dipoles or necking of the loops.
