2. Polyalkylene terephthalates (PET, PTT and PBT)
2.1 Presentation
These semi-aromatic polyesters have the general formula :
with n =2 (PET), 3 (PTT) or 4 (PBT) and Ar = C 6 H 4
They practically meet the definition of polyester for fibers, as laid down by the BISFA (Bureau International des Standards des Fibres Artifelles):
"Fibers composed of linear macromolecules containing at least 85% by...
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Polyalkylene terephthalates (PET, PTT and PBT)
Polyethylenaphthalate and copolymers (PEN)
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