THE STRUCTURE OF POLYETHYLENE TEREPHTHALATE TRANS CONFORMATION IN THE AMORPHOUS PHASE
聚对苯二甲酸乙二酯非晶区反式构象结构的探讨

PET film annealed at different temperatures have been studied in the far infrared spectra region (300-400cm-1). A 6 cm-1 shift near 382cm-1 band was found between crystalline trans (Tc) and amorphous trans conformation (Ta). The 388 cm-1 band should be associated with Ta conformation.According to the normal vibrational analysis, the differences among Tc, Ta and amorphous structure correspoding to the departures from planarity of the PET molecular unit were discussed.