The effect of hydrostatic pressure on the position of the 1616 cm −1 Raman line of poly(ethylene terephthalate)

Abstract

The effect of hydrostatic pressures up to 500 MPa on the position of the 1616 cm −1 Raman line of amorphous, randomly oriented poly(ethylene terephthalate) has been studied. The shift varies linearly with pressure, with a sensitivity of 5.6±0.3 cm −1GPa −1. This value is in excellent agreement with the value of 6.4±1.4cm −1GPa −1 recently deduced from measurements of the sensitivity of the position to tensile stress for four combinations of polarization directions of incident and scattered light.