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Biodegradability evaluation of polymers by ISO 14855-2.

Funabashi M, Ninomiya F, Kunioka M - Int J Mol Sci (2009)

Bottom Line: Sample preparation method for biodegradation test according to ISO/DIS 10210 was also described.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.

View Article: PubMed Central - PubMed

Affiliation: National Institute of Advanced Industrial Science and Technology, Higashi, Tsukuba, Ibaraki, Japan. m.funabashi@aist.go.jp <m.funabashi@aist.go.jp>

ABSTRACT
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.

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Size distributions of crushed PCL powders separated by sieves of 125 μm, 250 μm, and 500 μm [7].
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f8-ijms-10-03635: Size distributions of crushed PCL powders separated by sieves of 125 μm, 250 μm, and 500 μm [7].

Mentions: The PCL pellets and PLA pellets were mechanically crushed into PCL powders and PLA powders as described in the experimental section [6,7]. These powders were separated by sieves with 125 μm, 250 μm and 500 μm square holes. Photographs of the separated PCL powders are shown in Figure 6. The PCL powders of 0–125 μm in (a), 125–250 μm in (b), and 250–500 μm in (C). The PLA powders of 0–125 μm in Figure 7 (a), 125–250 μm in Figure 7 (b), and 250–500 μm in Figure 7 (C), respectively. The maximum length of each particle in the photographs was measured as the diameter of the particles. The size distributions of the crushed powders of PCL and PLA are shown in Figures 8 and 9, respectively. The distributions of the powders for three ranges divided by the sieves are shown in the figures by different colors. From the photographs and distributions, it is observed that the powder can be separated by sieves. It was found that the preparation method of the powder samples in this study is effective. The fine powders of polymers could be obtained by this method. The recoveries and averaged diameters of the PCL and PLA powders for each range fractionated by the sieves are shown in Tables 3 and 4, respectively [6,7]. The powder samples with 125–250 μm sizes are recommended in ISO/DIS 10210 for the biodegradation tests of ISO standards including ISO 14855-2.


Biodegradability evaluation of polymers by ISO 14855-2.

Funabashi M, Ninomiya F, Kunioka M - Int J Mol Sci (2009)

Size distributions of crushed PCL powders separated by sieves of 125 μm, 250 μm, and 500 μm [7].
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC2812819&req=5

f8-ijms-10-03635: Size distributions of crushed PCL powders separated by sieves of 125 μm, 250 μm, and 500 μm [7].
Mentions: The PCL pellets and PLA pellets were mechanically crushed into PCL powders and PLA powders as described in the experimental section [6,7]. These powders were separated by sieves with 125 μm, 250 μm and 500 μm square holes. Photographs of the separated PCL powders are shown in Figure 6. The PCL powders of 0–125 μm in (a), 125–250 μm in (b), and 250–500 μm in (C). The PLA powders of 0–125 μm in Figure 7 (a), 125–250 μm in Figure 7 (b), and 250–500 μm in Figure 7 (C), respectively. The maximum length of each particle in the photographs was measured as the diameter of the particles. The size distributions of the crushed powders of PCL and PLA are shown in Figures 8 and 9, respectively. The distributions of the powders for three ranges divided by the sieves are shown in the figures by different colors. From the photographs and distributions, it is observed that the powder can be separated by sieves. It was found that the preparation method of the powder samples in this study is effective. The fine powders of polymers could be obtained by this method. The recoveries and averaged diameters of the PCL and PLA powders for each range fractionated by the sieves are shown in Tables 3 and 4, respectively [6,7]. The powder samples with 125–250 μm sizes are recommended in ISO/DIS 10210 for the biodegradation tests of ISO standards including ISO 14855-2.

Bottom Line: Sample preparation method for biodegradation test according to ISO/DIS 10210 was also described.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.

View Article: PubMed Central - PubMed

Affiliation: National Institute of Advanced Industrial Science and Technology, Higashi, Tsukuba, Ibaraki, Japan. m.funabashi@aist.go.jp <m.funabashi@aist.go.jp>

ABSTRACT
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.

Show MeSH