期刊
SOFT MATTER
卷 15, 期 47, 页码 9710-9720出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9sm01958h
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- National Science Council of Taiwan [MOST 107-3017-F-027-001, MOST 106-2221-E-027-119-MY3]
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 degrees C) and crystallization temperature (T-c, 20 degrees C) in addition to excellent thermal stability with a thermal degradation temperature (T-d) above 300 degrees 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 theta = 21.5 degrees and 22.5 degrees gradually disappeared with PS content greater than 50 mol% and transformed into a PPS crystalline lattice at 2 theta = 22.3 degrees. 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.
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