Structure–property relationship of poly(cyclohexane 1,4‐dimethylene terephthalate) modified with high trans‐1,4‐cyclohexanedimethanol and 2,6‐naphthalene dicarboxylicacid

Abstract

A series of novel poly(1,4-cyclohexanedimthylene terephthalate-co-1,4-cyclohxylenedimethylene 2,6-naphthalenedicarboxylate) (PCTN) copolyesters were successfully melt polymerized using different content of trans-or cis-isomers. Before evaluations, the performance properties, their actual chemical composition, chemical structure, and molecular weight were determined using proton nuclear magnetic resonance ( 1 H-NMR), Fourier transform infrared spectroscopy (FTIR), and intrinsic viscosity (IV) measurements. Thermal studies of obtained copolyesters were carried out using differential scanning calorimetry (DSC). Thermal degradation behaviors were analyzed by thermogravimetric analysis (TGA). Randomly oriented film specimens were developed using a hot-press and their thermal, barrier, dimensional stability, and optical properties were analyzed and compared with conventional poly(ethylene terephthalate) (PET) and poly(ethylene naphthalate) (PEN). The results revealed that glass transition temperature (T g ), melting temperature (T m ), and crystallinity (X c ) of the synthesized copolyesters are increased in a linear trend by increasing the trans-1,4-cyclohexanedimethanol (trans-CHDM) isomers. It was also found that synthesized films had better thermal, barrier, optical, and dimensional stability properties than conventional PET and PEN films. Results clearly indicated that high trans-CHDM isomers significantly improve the performance properties of the fabricated films.

Terephthalic Acid Copolyesters Containing Tetramethylcyclobutanediol for High‐Performance Plastics

“…TPA‐ 30/70cis / trans CHDM polymer (PCT) and TPA‐EG polymer (PET) have T g of 88 and 80 °C and T m of 300 and 260 °C, respectively. [31] Table 2 shows the effect of the major diol and minor diol composition on thermal and mechanical properties.…”

High Thermal Stability, High Tensile Strength, and Good Water Barrier Property of Terpolyester Containing Biobased Monomer for Next-Generation Smart Film Application: Synthesis and Characterization

“…PCITN copolyester was melt polymerized using two different 5 L batch reactors of the pilot-scale melt polymerization reactor [ 22 ]. For esterification, the residual oxygen was removed from the reactor by purging pure nitrogen (N 2 ).…”

Fabrication and characterization of poly(1,4‐cyclohexanedimthylene terephthalate‐co‐1,4‐cyclohxylenedimethylene 2,6‐naphthalenedicarboxylate) (PCTN) copolyester film: A novel copolyester film with exceptional performances for next generation flexible electronic devices

“…The PCTN copolyester was synthesized using our previously reported method 17 . The pellets of PCTN copolyester with chemical composition of CHDM as a diol component and the mixture of TPA and NDA as a dicarboxylic acid component in a ratio of 40: 60 mole % of TPA: NDA, were melt polymerized using a piolet scale melt polymerization reactor.…”

“…But a higher amount of second diacids results in high cost and processing issues 14–16 . In our previous research, 17 we reported the successful synthesis of novel poly(1,4‐cyclohexanedimthylene terephthalate‐co‐1,4‐cyclohxylenedimethylene 2,6‐naphthalenedicarboxylate) (PCTN) copolyesters by two‐step melt polymerization and analyze their performance properties.…”