Investigations of the equilibrium melting temperature in PBT and PC/PBT blends

Mechanisms of reorganization of lamellae in syndiotactic polystyrene

“…Oppositely, the gradually elevating melting peak corresponding to preexisting lamellae/crystals observed with increasing scanning rate may be attributed to a thermal lag effect. 16 In fact, Diagram A reveals that the intensity of the P-II peak shows an opposite trend. In summary, the crystals of P-I and P-II were already present during initial melt-crystallization at low temperatures, with probably also some amount of P-III crystal, but the amount of P-III crystal could be further increased by reorganization (via melting of initially thinner P-I or P-II crystals) during DSC scanning.…”

A new approach for estimating the recrystallization rate and equilibrium melting temperature

“…With the at a heating rate of 0.0014ЊC/min, and Pompe et increment by which T m is raised decreasing with al. 21 obtained 233ЊC after considering the effect of increasing T c , the slope of the T m vs. T c plot is the thermal lag on the DSC heating scan.…”

Transesterification and compatibilization in the blends of bisphenol-A polycarbonate and poly(trimethylene terephthalate)

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] The thermal resistance and dimensional stability of PC can be combined with ease of processing and chemical resistance of PET if a proper blend can be prepared. Lee et al 2 have reported the transesterification between PC and PET and the resulting compatibility between PET and PC.…”

“…Transesterification in a polyblend of PBT and a liquid crystalline polyester has been followed quantitatively by Jo et al 11 They employed 13 C NMR and differential scanning calorimetry (DSC) techniques to study the extent of exchange reactions and have concluded that a random copolymers was formed for a 50/50 blend. Pompe et al 12 have investigated equilibrium melting temperature in PBT/PC blends and have shown that melting temperature and PC concentration influenced the properties of blends. Bennecom et al 13 have observed that the partial miscibility between PBT and PC was not observed for amide modified PBT and PC system.…”