How the structure and dispersion of carbon black affect its UV performance

Carbon black is more than a colorant. In addition to its tinting power, electrical or filler action, it provides plastics with a long-term and low cost UV protection, stabilising polyolefins and other polymers against sunlight. Its UV protection property is dependent on its morphology, loading and surface chemistry. However, as Christine Van Bellingen and John V. Accorsi of Cabot Corporation explain, if the carbon black is poorly dispersed or diluted, its full benefit will not be realized.