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The Monte-Carlo (MC) approach of Paper I is developed to predict the birefringence of PET. An extension of the modelling of polarisability is used that accounts for chain flexibility and for structural units containing several types of bonds. The rotational-isomeric-state (RIS) model for PET chains in melts is employed to calculate the polarisability of the terephthaloyl segment and of each of the...
Experimental measurements and Monte-Carlo (MC) modelling of the birefringence–strain, stress–strain and stress–optical behaviour of poly(ethylene terephthalate) (PET) are used, together with the analysis of orientation–strain and conformation–strain behaviour reported in Paper I, to give a detailed, quantitative interpretation and characterisation of its deformation-related properties. The difference...
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