A calorimetric study of blends of poly(ethylene terephthalate-co-p-oxybenzoate), PET/PHB, with poly(butylene terephthalate),
PBT has been carried out in the form of as-spun and drawn fibres. DSC melting and crystallization results show that PBT is
compatible with LCP and the crystallization of PBT decreases by the addition of LCP in the matrix. The crystallization behaviour
of blend fibres is investigated as a function of temperature of crystallization. A detailed analysis of the crystallization
course has been made utilizing the Avrami expression. The isothermal calorimetric measurements provide evidence of decrease
of rate of crystallization of PBT on addition of the liquid crystalline component up to about 50% by weight. The values of
the Avrami exponents change in the temperature range from 200° to 215°C. Dimensionality changes in crystallization could be
due to LCP mesophase-transition.