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Bio-based Aromatic Copolyesters: Influence of Chemical Microstructures on Thermal and Crystalline Properties.
- Source :
-
Polymers [Polymers (Basel)] 2020 Apr 05; Vol. 12 (4). Date of Electronic Publication: 2020 Apr 05. - Publication Year :
- 2020
-
Abstract
- Aromatic copolyesters, derived from bio-based nipagin and eugenol, were synthesized with renewable 1,6-hexandiol as the spacer. Number-average, weight-average molecular weights ( M <subscript>n</subscript> , M <subscript>w</subscript> ), and polydispersity ( D ) values were determined by size exclusion chromatography (SEC). Chemical structures were confirmed by <superscript>1</superscript> H NMR and <superscript>13</superscript> C NMR spectroscopies. Chemical microstructure analysis suggested that the nipagin and eugenol-derived units were inserted into polymer chains in an arbitrary manner. Due to the short chain of 1,6-hexanediol, the splitting of magnetically different methylene carbons, adjacent to the alcohol-oxygens, proved to be more sensitive towards sequence distributions, at the dyed level, than those from 1,10-decanediol. Thermal gravimetric analysis (TGA) demonstrated that these polyester materials have excellent thermal stability (> 360 °C), regardless of the content of eugenol-derived composition incorporated. Differential scanning calorimetric (DSC) and wide-angle X-ray diffraction (WXRD) experiments revealed the semicrystalline nature for this kind of copolyesters. The crystallinities gradually decreased with the increase of eugenol-derived composition. Thermal and crystalline properties were well discussed from the microscopic perspective. The point of this work lies in establishing guidance for future design and modification of high-performance polymer materials from the microscopic perspective.<br />Competing Interests: The authors declare no conflict of interest.
Details
- Language :
- English
- ISSN :
- 2073-4360
- Volume :
- 12
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Polymers
- Publication Type :
- Academic Journal
- Accession number :
- 32260560
- Full Text :
- https://doi.org/10.3390/polym12040829