Polyesters Based on Cyclohexanedimethanol

Synthesis and Characteristics of a Biobased High-Tg Terpolyester of Isosorbide, Ethylene Glycol, and 1,4-Cyclohexane Dimethanol: Effect of Ethylene Glycol as a Chain Linker on Polymerization

“…The ISB content was directly related to the increased T g of the polymer because of its two rigid fused rings, as shown in Figure . The CHDM content was kept in the range 30–45 mol % since the amorphous polyester with 30–50 mol % CHDM exhibits enhanced toughness. − The remainder was EG. Quintana et al fixed the COOH:diol ratio at 1:1.2 and added the desired amounts of ISB and CHDM to the system with excess EG.…”

Kinetics of Ternary Copolycondensation for High-Performance PCTG Copolyester with Ester Interchange, Polycondensation, and Mass Transfer

“…9−11 These copolyesters show low coloration, good chemical resistance, and high toughness, which promotes their application in the fields of plates, medical devices, food packaging, and so on. 12 In addition, PCTG or PETG has the superiority in the preparation of blends and composites, 13−15 which further expands their processing applications. However, the reported studies of PCTG or PETG copolyesters have mainly discussed the structure−property relationships, 16−18 the chemical composition and sequence structure distribution, 19 and the functionalization applications.…”

“…The yield stress of the PCTG or PETG copolyester decreases and the crack damage stress increases with the increase of CHDM content due to the effect of this aliphatic ring unit . The introduction of CHDM could change the melting point, glass transition temperature, and crystallization behavior of the copolysters. − These copolyesters show low coloration, good chemical resistance, and high toughness, which promotes their application in the fields of plates, medical devices, food packaging, and so on . In addition, PCTG or PETG has the superiority in the preparation of blends and composites, − which further expands their processing applications.…”

Surface Mechanical Properties and Topological Characteristics of Thermoplastic Copolyesters after Precisely Controlled Abrasion

“…, film extrusion, blow-molding, or fiber-spinning). Examples of commercialized (co)­polyesters used in the manufacture of, for instance, textiles, packaging, and 3D-printed objects, include poly­(ethylene terephthalate) (PET), poly­(1,4-cyclohexylene-di-methylene terephthalate) (PCT), poly­(1,4-cyclohexylene-di-methylene terephthalate- co -ethylene terephthalate) (PCTG), and acid-modified PCT (PCTA). , Some of these polyesters are semicrystalline with normal melting temperatures typically >250 °C, but with glass transition temperatures ( T g s) that are low (∼80 °C) compared to those of other common thermoplastics that remain amorphous (glassy) during application: poly­(methyl methacrylate) ( T g ≈ 105 °C) and polycarbonate ( T g ≈ 150 °C). ,− To increase the T g in a new family of glassy copolyesters, the rigid 2,2,4,4-tetramethyl-1,3-cyclobutane diol (TMCD) monomer has been chemically introduced into a glycol-modified PCT to yield poly­(1,4-cyclohexylene-dimethylene- co -TMCD terephthalate) (PCTT) . These polymers possess advantages similar to those of other copolyesters, but with a higher T g (∼110 °C) and without the incorporation of bisphenol-A and -S monomers required in the synthesis of polycarbonates. ,− …”