Characterization of deformation phenomena in polymers by rapid-scanning Fourier transform IR (FTIR) spectroscopy and mechanical measurements. 4. Uniaxial deformation of amorphous poly(butylene terephthalate).
The uniaxial deformation and recovery of primarily amorphous poly(butylene terephthalate) [24968-12-5] was investigated by simultaneous FTIR spectroscopy and stress-strain measurements. Contrary to annealed cryst. samples, the stress-induced transformation of the polymer chains to a conformation deviating slightly from the planar all-trans cryst. b-form was almost irreversible.
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