Arash Ranjbarzadeh Dibazar - Department of Biomaterials, Faculty of Science, Iran Polymer and Petrochemical Institute, P.O.Box:14965/115, Tehran, Iran;
Parvin Shokrollahi - Department of Biomaterials, Faculty of Science, Iran Polymer and Petrochemical Institute, P.O.Box:14965/115, Tehran, Iran;
Azam Rahimi - Department of Polymer Science, Faculty of Science, Iran Polymer and Petrochemical Institutes,POBox: 14965/115, Tehran, Iran
Jalal Barzin - Department of Biomaterials, Faculty of Science, Iran Polymer and Petrochemical Institute, P.O.Box:14965/115, Tehran, Iran;

Poly(tetrafluoroethylene) membranes were prepared through uniaxial stretching operations including cold extrusion, rolling, uniaxial stretching at temperatures up to melting point of PTFE and heat treatment. Morphology of thus prepared PTFE membranes was investigated with SEM. Heat treatment at final step is essential to prevent shrinkage. In this paper, effect of heat treatment is investigated on fixation of membrane morphology at the end of thermal stretching step

Poly(tetrafluoroethylene), membrane, shrinkage, heat treatment, morphology