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Poster De Conférence Année : 2011

The effect of the stretching of PLA extruded films on their crystallinity and gas barrier properties

Résumé

Driven by environmental concerns, new polymers based on renewable resources are arriving on the market to replace conventional polymers, obtained from petroleum, for different applications like food packaging. One of the most prominent polymers among these materials is poly(lactic acid) (PLA), a biodegradable, thermoplastic, aliphatic polyester derived from renewable resources, such as corn starch (in the USA) or sugarcanes (in the rest of the world). However this polymer presents different disadvantages and especially low gas barrier properties [1]. Thermal crystallization can be used to increase its gas barrier properties but long times are necessary [2] and are not compatible with an industrial process. Another way to increase the gas barrier properties consists in stretching the film in order to increase its crystallinity and so its diffusion coefficient. We have prepared stretched PLA films with different stretch ratio and we have studied the effect of the stretching parameters on the gas barrier properties of PLA films. Finally we compared this process with the isothermal crystallization process by taking into account the crystallinity degree and the crystalline morphology.

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Polymères
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Dates et versions

hal-01186863 , version 1 (25-08-2015)

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Citer

Alain Guinault, Gary Menary, Cecile Courgneau, D Griffith, Violette Ducruet, et al.. The effect of the stretching of PLA extruded films on their crystallinity and gas barrier properties. 14TH INTERNATIONAL CONFERENCE ON MATERIAL FORMING ESAFORM, Apr 2011, Belfast, France. pp.6, 2011, THE 14TH INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING: ESAFORM 2011. ⟨10.1063/1.3589618⟩. ⟨hal-01186863⟩
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