Abstract
Melt polycondensation of bibenzoate dimethyl esters with ethylene glycol enabled the synthesis of polyesters containing linear (4,4′-bibenzoate (4,4′BB)) and kinked (3,4′-bibenzoate (3,4′BB)) repeating units. Novel 3,4′BB:4,4′BB (co)polyesters with ethylene glycol (EG) showed an onset of weight loss (Td,5%) above 350 °C. 1H NMR spectroscopy confirmed 4,4′BB:3,4′BB incorporation, and size exclusion chromatography (SEC) revealed high molecular weights. Differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) revealed glass transition temperatures (Tg) approaching 121 °C, crystallization and melting transition temperatures (Tc and Tm), and sub-Tg β-relaxations. 4,4′BB incorporation below ∼45 mol % afforded an amorphous morphology, while 4,4′BB incorporation above 45 mol % induced crystallinity. Melt rheology elucidated the effect of structure on flow behavior, and time–temperature superposition (TTS) revealed distinct flow transitions. TTS analysis also provided insight into the structur...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
