Formulation of Poly(lactic acid) – polyadipate films and their application to

V.P.MARTINO; R.A.RUSECKAITE; A.JIMENEZ

Roma (Italia)

Conferencia; 4 International Conference on Nanostructured and Functional Polymer-based Materials and Nanocomposites; 2008

In the present work, PLA (Hycail CML) was melt-blended with three commercial polyadipates based on adipic acid and 1-3 propanediol with different molar masses between 1700 and 3400 g/mol. Blends were prepared in mass ratio 10 and 20 wt.% and processed into films by compression moulding. The obtained films were stored during 5 months at 28 ± 2ºC and structural, thermal, and thermo-mechanical properties were studied at different aging times in order to evaluate if the blends remained miscible. Concerning to food contact materials, there are several requirements they should meet. Besides good compatibility, low plasticizer migration and appropriate thermal and mechanical properties; its barrier properties, essentially to oxygen, are also relevant for this use (7). This is the reason why oxygen transmition rate (OTR) of the films was also measure