Polycyclohexylenedimethylene terephthalate

Typical polyesters characterized by GPC include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polycyclohexylenedimethylene terephthalate (PCT). Polyphthalamides (PPA) and polyamides are also commonly analyzed. 

Polycyclohexylenedimethylene terephthalate (PCT). Another polyalky-lene terephthalate polyester of significant commercial importance is PCT a condensation product of the reaction between dimethyl terephthalate and 1,4-cyclohexylene glycol, as shown in Fig. 1.20. 

Polycyclohexylenedimethylene terephthalate (PCI) is a condensation product of the reaction between dimethyl terephthalate and 1,4-cyclohexylene glycol. This material is biaxially oriented into films, and although it is mechanically weaker than PET, it offers superior water and weather resistance. PCT also differentiates itself from PET and PBT by its higher heat-distortion temperature. Copolymers of PCT include an acid-modified polyester and a glycol-modified polyester. Major suppliers of PCT are Eastman Chemical (Thermix, Eastar) and GE Plastics (Valox). 

Polycyclohexylenedimethylene terephthalate A semicrystal-line polymer that is similar to PET. It has many of the same characterishcs, but has much higher heat resistance. It is often described as a high-heat polyester. 

Polycyclohexylenedimethylene Ethylene Terephthalate Thermoplastic polymer of cyclohexylene-dimethylenediol, ethylene glycol, and terephthalic acid. Has good clarity, stiffness, hardness, and low-temperature toughness. Processed by injection and blow-molding and extrusion. Used in containers for cosmetics and foods, packaging film, medical devices, machine guards, and toys. Also called PETG. 

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