Recycling and Self-Healing of Polybenzoxazines with Dynamic Sulfide Linkages

• Published in: Scientific reports Vol. 7; no. 1; pp. 5207 - 11
• Main Authors: Arslan, Mustafa, Kiskan, Baris, Yagci, Yusuf
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 12-07-2017; Nature Publishing Group; Nature Portfolio
• Subjects: 639/638/455/941; 639/638/455/959; Bisphenol A; Chemistry; Humanities and Social Sciences; multidisciplinary; Polymerization; Polymers; Propylene oxide; Recycling; Science; Science (multidisciplinary); Smart materials; Sulfides; Sulfur; Thermal stability
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-017-05608-2

In this work, a recycling and self-healing strategy for polybenzoxazines through both S–S bond cleavage-reformation reaction and supramolecular attractions is described. Both recyclable and self-healable polybenzoxazines can be prepared from low cost chemicals with a simple procedure in only 30 minutes. For this purpose, inverse vulcanization of poly(propylene oxide)benzoxazine (PPOB) and diallybenzoxazine (B-al) with elemental sulfur was performed at 185 °C. The obtained cross-linked polymer films exhibited thermally driven recycling ability up to 5 cycles. Moreover, the self-healing ability of a test specimen was shown. Spectral characterizations, thermal stability and fracture toughness of the films were investigated after each recycling.