Differential Scanning Calorimetry Study Of Plasticized Poly(Lactic Acid) Films During Aging

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

Portoroz (Eslovenia)

Congreso; European Polymer Congress 2007; 2007

European Polymer Federation

 commercial PLA was used as polymeric matrix and a commercial polyadipate with Mn = 1700 Da. as plasticizer. Materials were melt-blended in a Brabender mixer at 170ºC in mass ratio varying from 5 to 20 wt.% and processed into films by compression moulding. Plasticized-PLA films were kept at room temperature and its influence on crystallinity was evaluated by DSC. An enthalpy relaxation increasing with aging time was observed at Tg for the pure polymer and low plasticizer concentrations (=10wt.%). Aging of samples resulted in a higher amount of material that can crystallize only upon heating.