LI Fl-ming, ZHOU Han-xin, SUN Tong. THE CHARACTERIZATION OF TRANSESTERIFICATION OF THE BLENDS CONSISTING OF LIQUID CRYSTAL COPOLYESTER PHB/PET AND PET[J]. Acta Polymerica Sinica, 1993,(2):189-194.
LI Fl-ming, ZHOU Han-xin, SUN Tong. THE CHARACTERIZATION OF TRANSESTERIFICATION OF THE BLENDS CONSISTING OF LIQUID CRYSTAL COPOLYESTER PHB/PET AND PET[J]. Acta Polymerica Sinica, 1993,(2):189-194.DOI:
When the blends containing PHB/PET liquid crystal copolyester and PET were annealed near 280癈
it was found that the melting point of the blends decreased with the annealing time. If the annealing time was kept constant
the higher annealing temperature resulted in lower melting point. However
the melting point of the pure PET which had the same annealing history was almost not changed. It was demonstrated by NMR that the melting point decrease of the blends during annealing process was due to the transesterification between PHB/PET and PET. Therefore
the extentof transesterification of the blends can be estimated ac-cording to the thermal-properties of the blends and the change of the PHB/PET sequence structure.