TY - JOUR
AU - Li, Guangxian
AB - Poly(lactic acid)/polycarbonate blends were prepared by melt mixing. The transesterification reaction between poly(lactic acid) and polycarbonate was promoted by using tetrabutyl titanate as a catalyst. For poly(lactic acid)/polycarbonate (weight ratio of 75/25) blend with catalyst content up to 0.5 wt%, polycarbonate particles finely dispersed in the poly(lactic acid) matrix and the adhesion between the phases were improved, due to the enhanced compatibility by transesterification reaction. The blends were foamed by using batch-foaming process with CO2 as the blowing agent. Cell density of poly(lactic acid)/polycarbonate blend increased at low-catalyst content, while decreased at high-catalyst content, which was due to the changes of interfacial properties of blend phases through transesterification reaction and crystallinity of polycarbonate component. Cell types of poly(lactic acid)/polycarbonate blends were transferred from submicro-sized and even nanoscale cells to microscale cells by the deceased crystallinity of poly(lactic acid) component, which was caused by the increased degree of transesterification reaction and temperature. The declined viscosity of poly(lactic acid)/polycarbonate blend because of degradation during blend processing led to large cell size and low-cell density. However, the improvement of elasticity and viscosity of poly(lactic acid)/polycarbonate blend by transesterification reaction could decrease the cell size.
TI - Effects of enhanced compatibility by transesterification on the cell morphology of poly(lactic acid)/ polycarbonate blends using supercritical carbon dioxide
JF - Journal of Cellular Plastics
DO - 10.1177/0021955X14537661
DA - 2015-07-01
UR - https://www.deepdyve.com/lp/sage/effects-of-enhanced-compatibility-by-transesterification-on-the-cell-CddleF0abm
SP - 349
EP - 372
VL - 51
IS - 4
DP - DeepDyve
ER -