Chinese Journal of Polymer Science

, Volume 29, Issue 1, pp 125–132 | Cite as

Superior tensile extensibility of PETG/PC amorphous blends induced via uniaxial stretching

  • Li Chen
  • Xin-lan Zhang
  • Huai-yuan Li
  • Bo Li
  • Ke Wang
  • Qin Zhang
  • Qiang Fu (傅强)
Article
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Revised:
Accepted:

Abstract

A simultaneous increase of both stiffness and extensibility of poly(ethylene glycol-co-cyclohexane-1,4-dimethanol terephthalate) (PETG)/polycarbonate (PC) blends prepared through the slit die extrusion-uniaxial cold stretching process was observed. The stretched sheets have a unique mechanical character that an increased tensile modulus is accompanied by an increased extensibility with increasing the draw ratio. Especially, a sharp increasing of the extensibility is observed for PETG/PC (70/30 wt%) blends at draw ratios between 8.2 and 20.0, where a nine times increase of extensibility is achieved. The mechanism of stretching-induced superior extensibility is investigated via micrograph observation, rheometry and calorimetric analysis. The observed superior extensibility could be tentatively explained by the bridging effect of the PC microfibrils on the crack development during tensile failure.

Keywords

In situ fibrillation Amorphous blends Extensibility Uniaxial stretching 
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Copyright information

© Chinese Chemical Society, Institute of Chemistry, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Li Chen
    • 1
  • Xin-lan Zhang
    • 1
  • Huai-yuan Li
    • 2
  • Bo Li
    • 1
  • Ke Wang
    • 1
  • Qin Zhang
    • 1
  • Qiang Fu (傅强)
    • 1
  1. 1.Department of Polymer Science & MaterialsSichuan University, State Key Laboratory of Polymer Materials EngineeringChengduChina
  2. 2.College of Light Industry, Textile and Food EngineeringSichuan UniversityChengduChina

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