Biodegradabilities of polymers and their composites in a controlled compost
were described. Polycaprolactone (PCL) and poly(lactic acid) (PLA) were employed as
biodegradable polymers. Biodegradabilities of PCL and PLA samples in a controlled
compost were measured using a Microbial Oxidative Degradation Analyzer (MODA)
according to ISO 14855-2. Sample preparation method for biodegradation test according to
ISO/DIS 10210 was also described. Effects of sizes and shapes of samples on
biodegradability were studied. Reproducibility of biodegradation test of ISO 14855-2 by
MODA was confirmed. Validity of sample preparation method for polymer pellets,
polymer film, and polymer products of ISO/DIS 10210 for ISO 14855-2 was confirmed.