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Jean-Sébastien Hébert, Paula Wood-Adams, Marie-Claude Heuzey, Charles Dubois and Josée Brisson Morphology of polylactic acid crystallized during annealing after uniaxial deformation Journal of Polymer Science Part B: Polymer Physics 51

Version of Record online: 18 DEC 2012 | DOI: 10.1002/polb.23231

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L-Polylactic acid (PLLA) exhibits polymorphism, and its crystallinity is affected by deformation and annealing time. A comparison of the deformation of PLLA is reported under two uniaxial stretching temperatures (70 °C, or Tg + 10 and 90 °C, or Tg + 30) and two different post-deformation annealing times (15 and 45 min). Longer times give insight on changes in morphology post-deformation. Wide-angle X-ray diffraction and differential scanning calorimetry were used to investigate changes in orientation, crystallinity, and relative crystal size/order.

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