Effect of conformation on the properties of uniaxially drawn polylacide films upon drawing temperature

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• 作者：Mi Ok Oh ; Seong Hun Kim
• 刊名：Fibers and Polymers
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：17
• 期：7
• 页码：992-999
• 全文大小：484 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Polymer Sciences
  
• 出版者：The Korean Fiber Society
• ISSN：1875-0052
• 卷排序：17

文摘

Polylactide(PLA) films were drawn at various drawing temperature of 65, 90 and 120 °C. The effects of drawing temperature on structural conformation and properties of PLA films were investigated. It was confirmed that the PLA films at drawing temperature of 65 and 90 °C were composed of α′ phase crystal form. The strain-induced crystallization and molecular orientation increased with increasing the draw ratio, which result in improving the mechanical and thermal properties of α′ phase PLA films. However, at drawing temperature of 120 °C, the strain-induced crystallization and molecular orientation of PLA films were not distinctly detected. It was supposed that the rate of the chain relaxation was faster than chain orientation and strain-induced crystallization during uniaxial drawing process.KeywordsPoly(lactide)α′ phaseUniaxial drawingStrain induced crystallineMolecular orientation