Guo-xiang Zou, Xin Zhang, Bing-jian Li, Cai-xia Zhao, Jin-chun Li. EFFECT OF MINERAL FILLERS ON CRYSTALLIZATION AND MELTING BEHAVIOR OF POLY(LACTID ACID)/ MINERAL FILLER COMPOSITES[J]. Acta Polymerica Sinica, 2012,(9):952-957.
A series of poly(lactid acid) (PLA)/mineral filler composites have been prepared by melt blending.Crystallization and melting behaviors of PLA composites containing calcium carbonate (CaCO3)
montmorillonite (MMT) and attapulgite (AT) have been studied by differential scanning calorimetry (DSC)
respectively.The results exhibited that MMT and AT did not obviously influence the slow-cooling crystallization of PLA
whereas CaCO3 effectively facilitated the crystallization of PLA in this process.The crystallization enthalpy (Hc) increased with increasing the content of CaCO3 at a cooling rate of 2.5 K/min.Moreover
the type and content of the fillers played an important role in the cold crystallization and melting remarkably.Low-content mineral fillers would promote the nucleation in the cold crystallization of PLA
among which MMT was the best effective.Meanwhile
different mineral fillers with relatively high contents would affect the crystal structures of PLA