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Effect of matrix composition on the performance of calcium carbonate filled poly(lactic acid)/poly(butylene adipate- co -terephthalate) composites
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Abstract
The ratio of poly(lactic acid) (PLA), poly(butylene adipate-
co
-terephthalate) (PBAT), and calcium carbonate (CaCO
3
) fillers in PLA/PBAT/CaCO
3
composites was set at 90/10/5, 70/30/5, and 30/70/5. The effect of nano- and micro-CaCO
3
on the melting and crystallization performance of the composites was investigated by differential scanning calorimetry. PLA crystallization was related to the PLA and PBAT ratio, cooling rate, and CaCO
3
particle size in PLA/PBAT/CaCO
3
composites. Nano-CaCO
3
prevented the crystallization of PLA in PLA/PBAT/CaCO
3
90/10/5 and 70/30/5 but did not prevent the crystallization of PLA in PLA/PBAT/CaCO
3
30/70/5. Unlike nano-CaCO
3
, micro-CaCO
3
did not prevent PLA crystallization regardless of the PLA and PBAT ratio. Nano- and micro-CaCO
3
enhance PLA90 and PLA70 to some extent, due to the aggregation and dissociation of the CaCO
3
filler in polylactic acid. But nano- and micro-CaCO
3
improved the mechanical properties of PLA30 several times, due to the good compatibility of the CaCO
3
filler and PBAT. The effect of nano-CaCO
3
and micro-CaCO
3
on the mechanical properties of PLA/PBAT/CaCO
3
composites had no significant difference.
Walter de Gruyter GmbH
Title: Effect of matrix composition on the performance of calcium carbonate filled poly(lactic acid)/poly(butylene adipate-
co
-terephthalate) composites
Description:
Abstract
The ratio of poly(lactic acid) (PLA), poly(butylene adipate-
co
-terephthalate) (PBAT), and calcium carbonate (CaCO
3
) fillers in PLA/PBAT/CaCO
3
composites was set at 90/10/5, 70/30/5, and 30/70/5.
The effect of nano- and micro-CaCO
3
on the melting and crystallization performance of the composites was investigated by differential scanning calorimetry.
PLA crystallization was related to the PLA and PBAT ratio, cooling rate, and CaCO
3
particle size in PLA/PBAT/CaCO
3
composites.
Nano-CaCO
3
prevented the crystallization of PLA in PLA/PBAT/CaCO
3
90/10/5 and 70/30/5 but did not prevent the crystallization of PLA in PLA/PBAT/CaCO
3
30/70/5.
Unlike nano-CaCO
3
, micro-CaCO
3
did not prevent PLA crystallization regardless of the PLA and PBAT ratio.
Nano- and micro-CaCO
3
enhance PLA90 and PLA70 to some extent, due to the aggregation and dissociation of the CaCO
3
filler in polylactic acid.
But nano- and micro-CaCO
3
improved the mechanical properties of PLA30 several times, due to the good compatibility of the CaCO
3
filler and PBAT.
The effect of nano-CaCO
3
and micro-CaCO
3
on the mechanical properties of PLA/PBAT/CaCO
3
composites had no significant difference.
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