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Mechanical properties and thermal stability of poly(L-lactide)/calcium carbonate composites

✍ Scribed by Hun-Sik Kim; Byung Hyun Park; Jae Hoon Choi; Jin-San Yoon

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
269 KB
Volume
109
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

Poly(L‐lactide) (PLA) was melt‐mixed with micrometer‐sized and nanosized calcium carbonate (CaCO~3~) particles before and after modification with calcium stearate. Adhesion between the CaCO~3~ particles and the PLA matrix was assessed qualitatively by scanning electron microscopy observation of the fractured surface morphology of the composites. The effect of the incorporation of the CaCO~3~ particles on the thermal stability of the PLA‐based composites was quantified by the temperatures corresponding to 5 and 50% of weight loss and the activation energy determined through thermogravimetric analyses of the composites. The tensile strength and modulus values of the composite were improved greatly without a significant loss in the elongation at break when the nanosized CaCO~3~ was incorporated up to 30 wt %. Β© 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008

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