The Stability of Poly(lactic acid) Packaging Films as Influenced by Humidity and Temperature

Holm, Vibeke K.; Ndoni, Sokol; Risbo, Jens

doi:10.1111/j.1365-2621.2006.tb08895.x

Cited by 84 publications

(55 citation statements)

References 29 publications

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“…The degradation mechanisms and molecular weight change of PLA over time have been reported previously for 130-mm thick films at elevated temperature and humidity [12,13]; however, there is a lack of information about the degradation characteristics for fibers. Specifically, at temperatures above the glass transition temperature, but below the melting temperature, the effect of fiber diameter on the degradation characteristics of PLA is not well studied.…”

Section: Introductionmentioning

confidence: 95%

Degradation of PLA fibers at elevated temperature and humidity

Mitchell

Hirt

2014

Polymer Engineering & Sci

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The hydrolytic degradation of poly(lactic acid) (PLA) devices has previously been reported as size dependent for devices such as plates, microspheres, and films between 2 and 0.3 mm in thickness or diameter. In this study, the effect of fiber diameter on the degradation characteristics of PLA fiber of two diameters, 32 mm (PLA32) and 118 mm (PLA118), aged at 40, 60, and 80 C with 100% relative humidity, was investigated. Additionally, both PLA32 and PLA118 were aged at 40 and 60 C under nitrogen purge. The degradation of the fibers was evaluated based on changes in the total weight, crystallinity, and molecular weight of the samples. Both diameters exhibited similar total weight loss, crystallinity, and molecular weight loss profiles under each set of degradation conditions. Two models for the change in molecular weight were compared: a first order model and an autocatalytic model. For the obtained data, both models provided a reasonable fit of the molecular weight data. Based on the rate constants obtained for each model, the activation energy for PLA degradation was calculated (26.3 kcal mol 21 for the first order model and 22.4 kcal mol 21 for the autocatalytic model). The activation energies obtained were close to other values reported in the literature for PLA hydrolysis.

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Section: Introductionmentioning

confidence: 95%

Degradation of PLA fibers at elevated temperature and humidity

Mitchell

Hirt

2014

Polymer Engineering & Sci

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“…Fan et al [107] showed that a tensile load and a combination tensile/vertical load enhanced NHD as traced by weight loss and molecular weight change. In the case of storage in the air, the hydrolytic degradation rate of PLA increases with relative humidity (RH) and temperature [75,114].…”

Section: Effects Of Miscellaneous Medium Parametersmentioning

confidence: 99%

Hydrolytic Degradation

Tsuji

2010

Poly(Lactic Acid)

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“…Polylactic acid (PLA) films are of attracting, increasing interest for developing biomaterial for food packaging applications, not only because of the need to replace many petroleum-based polymers (Gontard and Guilbert, 1993), but also because of its useful physical and mechanical characteristics (Drumright et al, 2000;Auras et al, 2004;Holm et al, 2004). The performance of PLA as food packaging material is undergoing progressive improvement concerning, for example, the gas barriers and mechanical properties, as a result of recent extensive developments (Auras et al, 2003;Sinha Ray et al, 2003;Lagaron et al, 2007).…”

Section: Introductionmentioning

confidence: 95%