The Effect of Uniaxial Stretching on the Crystallization Behaviors of Polylactic Acid Film

Hui Li Xie; Kai Guo; Jin Zhou Chen; Wan Jie Wang; Ming Jun Niu; Xin Fa Li

doi:10.4028/www.scientific.net/AMR.418-420.625

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 418-420The Effect of Uniaxial Stretching on the...

The Effect of Uniaxial Stretching on the Crystallization Behaviors of Polylactic Acid Film

Abstract:

Abstract. The effect of uniaxial stretching of different stretching ratio at 80 °C, 90°C, 100°C, 110 °C and 120°C on the crystallization behavior of polylactic acid (PLA) film was investigated by using differential scanning calorimetry (DSC), wide-angle X-ray diffraction (XRD) and polarizing microscope (POM). The results showed that the crystallinity of PLA film was improved via uniaxial tensile orientation and increased with increasing stretch ratio, and the crystallinity of PLA film reached the maximum under the conditions of 90°C and stretching ratio 300%. Stretched PLA films show α crystal form. The spherulites deform to ellipsoids after stretching.

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Materials Processing Technology, ICAMMP2011

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Advanced Materials Research (Volumes 418-420)

Pages:

625-628

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.418-420.625

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Online since:

December 2011

Authors:

Hui Li Xie, Kai Guo, Jin Zhou Chen, Wan Jie Wang, Ming Jun Niu, Xin Fa Li

Keywords:

Crystallinity, Poly(lactic acid) (PLA), Spherulite, Uniaxial Tensile

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