Sifat transmisi, pekali pupusan dan keterpantulan optik kepingan poli(metil metakrilat) (PMMA) didop dengan metil merah dan ferum (III) asetilasetonat
Mat Yunus, Wan Mahmood and Abd. Moksin, Mohd Maarof and Wan Yunus, Wan Md. Zin and Abdul Wahab, Noraini and Umam, Azizah (1999) Sifat transmisi, pekali pupusan dan keterpantulan optik kepingan poli(metil metakrilat) (PMMA) didop dengan metil merah dan ferum (III) asetilasetonat. Pertanika Journal of Science & Technology, 7 (1). pp. 43-55. ISSN 0128-7680
The optical transmission, reflection and extinction coefficient of a PMMA doped with methylene-red (PMMA-MM) and ferum (III) acetylacetonate (PMMA-FM) are presented. A rapid change of the optical transmission was observed in the range of wavelength (420-650 nm) and (500 - 600nm) for PMMA-FM and PMMAMM respectively. Eventhough the decrease of the optical transmission and the increase of the extinction coefficient do not linearly relate with increasing concentration of methylene-red and ferum (III) asetilasetonate, the transmission curve and the cut off transmission are still affected by doping concentration. It was found that the cut off value for PMMA-MM shifted from 200nm (for pure PMMA) to 550 nm when the concentration was increased to 6.3 31O-3mmol/g. A similar shift (200nm to 500nm) was also observed for PMMA-FM but with a higher doping concentration (i.e 30.7310-3 mmol/g).
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