Bio-based thermoplastic poly(butylene succinate-co-propylene succinate) copolyesters: effect of glycerol on thermal and mechanical properties. Issue 47 (15th November 2019)

• Record Type: Journal Article
• Authors: Hsu, Kai-Hung; Chen, Chin-Wen; Wang, Li-Yuan; Chan, Hao-Wei; He, Cyuan-Lun; Cho, Chia-Jung; Rwei, Syang-Peng; Kuo, Chi-Ching
• Is Part Of: Soft matter. Volume 15:Issue 47(2019)
• Page Start: 9710
• Page End: 9720
• Publication Date: 2019-11-15
• Subjects: Soft condensed matter -- Periodicals; 530.413
• DOI: 10.1039/c9sm01958h
• Languages: English
• ISSNs: 1744-683X

Abstract

Abstract : The thermal and mechanical properties of the bio-based thermoplastic copolyesters can be controlled by adjusting the glycerol content and this allows the use of such copolyesters in medical support, and coating on 3D fabrics applications. Abstract : Poly(butylene succinate- co -propylene succinate) (PBSPS) was polymerized using succinic acid, 1, 4-butanediol, 1, 3-propanediol, and glycerol (GC). The PBSPS copolyester with a BS/PS ratio of 7/3 has a low melting point ( T m, 80 °C) and crystallization temperature ( T c, 20 °C) in addition to excellent thermal stability with a thermal degradation temperature ( T d ) above 300 °C. Isodimorphism was observed for 30–50 mol% PS, lowering T m and T c . The featured crystalline lattices (021) and (110) of PBS at 2 θ = 21.5° and 22.5° gradually disappeared with PS content greater than 50 mol% and transformed into a PPS crystalline lattice at 2 θ = 22.3°. Young's modulus decreased with increasing PS content due to crystallinity loss. Wide-angle X-ray diffraction demonstrated that the chain movement regularity was affected by the GC content, reducing the crystallinity. The PBSPS copolyesters were elastic with 0.001 mol% GC but became rigid with GC content greater than 0.01 mol%. The chain conformation was flexible for 0.001–0.01 mol% GC and exhibited an irregular steric architecture for 0.02–0.03 mol% GC due to more GC acting as nodes. Thus, the thermal and mechanical properties of the synthesized bio-based PBSPS copolyesters can be controlled by adjusting the GC content; therefore, such copolyesters are suitable for medical support, coating, and phase-change material applications.