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The effects of an epoxide-based chain-extender (CE) on the properties of poly(lactic acid) (PLA) foams obtained by chemical foaming extrusion using 4wt.% of chemical foaming agent (CFA) were studied. PLA/CE blends with different weight ratios of CE were initially processed using a co-rotating twin-screw extruder. PLA/CE foams were then produced using a single-screw extruder. Various PLA/CE foams characterizations,...
The present study aims at assessing the extrusion foaming characteristics of two commercial grades of poly(lactic acid) (PLA) using a chemical foaming agent (CFA). For each PLA the process was optimized based on a maximal void fraction criterion. The extruder die temperature significantly affects the void content (maximal for about 195 °C). An increase in the barrel temperature profile was also correlated...
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