Thermal Properties of Poly lactic Acid

4 Heat Capacity, Thermal Conductivity and Pressure—Volume—Temperature of PLA 

Thermal properties of PLA are usually determined by differential scanning calorimetry (DSC), thermogravimetric analysis 

Polylactic Acid. DOI http //dx.doi.org/10.1016/B978-l-4377-4459-0.00003-2 2012 Elsevier Inc. All rights reserved. 109 

Thus the Tg of PLA is dependent on both the molecular weight and the optical purity of the polymer. As reported by Dorgan et al. (2005), PLA with a higher content of L-lactide has higher Tg values than the same polymer with the same amount of D-lactide (Dorgan et al., 2005). In general, the 

According to Auras et al. (2004), the improvement of crystallinity in PLA can be done by annealing at a temperature of 75°C to the melting point of amorphous PLA. This is 

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L. Petersson, I. Kvien, and K. Oksman, Stmcture and thermal properties of poly (lactic acid)/cellulose whiskers nanocomposites materials. Compos. Sci. Technol, 67 (2007)2535-2544. 

Petersson, L., Kvien, I., Oksman, K., Structure and thermal properties of poly(lactic acid)/cellulose whiskers nanocomposite materials. Composites Science and Technology. 11-12, 2535-2544 (2007), DOI http //dx.doi.0rg/lO.lOl6/j.compscitech.2006.12.012. 

Qin, L., Qiu, J., Liu, M. et al. (2010) Mechanical and thermal properties of poly(lactic acid) composites with rice straw fiber modified by poly(butyl acrylate). Chemical Engineering Journal, 166, 772-778. 

Ljungberg N., Wesslen B., The effects of plasticizers on the dynamic mechanical and thermal properties of poly(lactic acid), J. Appl. Polym. ScL, 86(5), 2002,1227-1234. 

Petersson L, Kvien 1, Oksman K (2007) Structure and thermal properties of poly (lactic acid)/ cellulose whiskers nanocomposite materials. Compos Sci Technol 67 2535-2544 Petersson L, Mathew AP, Oksman K (2009) Dispersion and properties of cellulose nanowhiskers and layered silicates in cellulose acetate butyrate nanocomposites. J Appl Polym Sci 112 ... 

Zhang J F, Sun X (2004c), Mechanical and thermal properties of poly (lactic acid)/starch blends with dioctyl maleate , J. Appl. Polym. Sci. 94, 1697-1704. 

PROCESSING CONDITIONS AND THERMAL PROPERTIES OF POLY(LACTIC ACID). 

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