| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5179589 | Polymer | 2016 | 10 Pages |
â¢Poly(benzoxazole-co-imide)s films with tunable physical properties are prepared.â¢High temperature multiple-shape memory behaviors of poly(benzoxazole-co-imide)s are demonstrated.â¢Potential mechanism of multiple-shape memory effects is suggested.
High temperature triggered multiple-shape memory poly(benzoxazole-co-imide)s with adjustable properties were prepared via facile random copolymerization 3,3â²,4,4â²-biphenyltetracarbolylic dianhydride (BPDA) with two different diamine of 4,4â²-oxydianiline (ODA) and 5-amino-2-(4-aminobenzene) benzoxazole (BOA). The effect of polybenzoxazole on the molecular packing, physical properties and shape memory behaviors of poly(benzoxazole-co-imide)s was investigated systematically. The incorporation of polybenzoxazole into polyimides endows better mechanical properties, higher chain packing, broad glass transition temperature and excellent tunable dual-shape memory behaviors with shape fixity above 98% and shape recovery up to 98%. Besides, multiple-shape memory effects with high switching temperature are first achieved in poly(benzoxazole-co-imide)s, and the multiple-shape memory could be adjusted by choosing the two different switching temperatures. Lastly, the potential mechanism of multiple-shape memory behaviors of poly(benzoxazole-co-imide)s are suggested.
Graphical abstractDownload high-res image (272KB)Download full-size image
