ETFE-foils - morphology and production progress

The building-physics and mechanical behaviour of the foils are principally determined by their morphological structure. For this reason, the following section explains the morphology, production and resulting material behaviour of ETFE-foils in sequence. 

The nonlinear viscoelastic material behaviour of ETFE depends substantially on the values of temperature and stresses and on the velocity of its exposure. Reasons for this behaviour are the morphological structure and the molecular configuration of ETFE. 

Two basic compositions of the macromolecules exist amorphous and semi-crystalline compositions (Fig. 6.26). Molecular chains with an 

25 Basic configurations of macromolecuies (a) linear, (b) branched, (c) crosslinked, (d) tangle (according to Ehrenstein, 1999). 

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