Details

Autor(en) / Beteiligte

• Xu, Pengwu
• Cao, Ying
• Lv, Pei
• Ma, Piming
• Dong, Weifu
• Bai, Huiyu
• Wang, Wei
• Du, Mingliang
• Chen, Mingqing

Titel

Enhanced crystallization kinetics of bacterially synthesized poly(3-hydroxybutyrate-co-3-hydroxyhexanate) with structural optimization of oxalamide compounds as nucleators

Ist Teil von

• Polymer degradation and stability, 2018-08, Vol.154, p.170-176

Ort / Verlag

London: Elsevier Ltd

Erscheinungsjahr

2018

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Bacterially synthesized poly (3-hydroxybutyrate-co-3-hydroxyhexanate) (PHBH) has attracted much attention as biodegradable plastics and potential biomaterials. However, the crystallization rate of PHBH is very low, which limits its application in plastic field. Herein, oxalamide compounds (OXAn) with a formula of C6H5NHCOCONH(CH2)nNHCOCONHC6H5 (n = 2, 4, 8, 12) were tailor-made as nucleators to improve the crystallization behaviors of PHBH. The effect of aliphatic spacer length of OXAn, i.e., -(CH2)n-on the nucleation behavior was investigated. The OXAn would assemble into shish-like superstructures and PHBH crystals preferred to grow on the surfaces of the shish. The crystallization rate of PHBH/OXAn blends increased with the spacer length of OXAn up to n = 8 and then leveled off, which trend was consistent with the nucleation activity (Ψ) and the nucleation constant (Kg) of the OXAn. Meanwhile, the OXAn increased the nuclei density of the PHBH while inhibited its secondary crystallization, resulting in a superior and steady mechanical performance of PHBH materials. This work provides a scientific approach to design the optimal structure of OXAn as nucleators for PHBH materials, which may broaden the application range of PHBH materials. •Crystallization kinetics of PHBH was greatly enhanced.•The t1/2 of PHBH was decreased by 93% after adding OXAn.•PHBH/OXAn with superior and steady mechanical performance was achieved.•A scientific approach to optimal structure of nucleators was provided.