摘要
Polycarbonate (PC) and acrylic-styrene-acrylonitrile terpolymer (ASA), namely PC/ASA, coated with composite films of 2-(2′-hydroxy-5′-methylphenyl)benzotriazole-P (UV-P)-modified carbon nanotubes (m-CNTs) exhibited accelerated ageing. The UV–visible absorption spectra of the composite films showed obvious redshift due to the synergistic effect between m-CNTs and UV-P. SIMS and FTIR confirmed that UV-P and m-CNT were successfully combined. Ageing of the UV-P/m-CNT composite film was tested under comparable conditions causing a shallow, surface crack, a low reduction in the contact angle, and minor changes in the surface roughness. The mechanical properties and heat resistance do not decrease significantly, indicating that the UV-P/m-CNT composite film protects PC/ASA, further prolonging its use time. Finally, the aged PC/ASA polymer was reshaped by mechanical and physical regeneration, and its mechanical properties exhibited recoveries of ∼95%, thereby indicating their potential for reusability.