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Structure and mechanical properties of highly oriented poly(ethylene terephthalate) films
Author(s) -
Evstatiev M.,
Fakirov S.,
Apostolov A.,
Hristov H.,
Schultz J. M.
Publication year - 1992
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760321408
Subject(s) - materials science , annealing (glass) , differential scanning calorimetry , crystallite , composite material , ethylene , poly ethylene , scattering , modulus , infrared spectroscopy , optics , thermodynamics , organic chemistry , metallurgy , chemistry , physics , catalysis
The relationships between the supermolecular structure of poly(ethylene terephthalate) films subjected to cold drawing and subsequent zone annealing and their mechanical properties are investigated. The effectiveness of zone annealing is compared to that of annealing with fixed ends. Microstructural changes occurring during heat treatment and zone annealing are monitored using wide angle X‐ray scattering, small angle X‐ray scattering, infrared spectroscopy, differential scanning calorimetry, and static mechanical tests. The very high modulus and strength of the zone‐annealed films are directly attributed to the large number of the molecules connecting the crystallites.