Optimization of pH and direct imaging conditions of complexed methylene blue sensitized poly(vinyl chloride) films
Author(s) -
M. Ushamani,
N. G. Leenadeenja,
K. Sreekumar,
C. Sudha Kartha,
Rani Joseph
Publication year - 2003
Publication title -
bulletin of materials science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.35
H-Index - 72
eISSN - 0973-7669
pISSN - 0250-4707
DOI - 10.1007/bf02707457
Subject(s) - methylene blue , materials science , diffraction , vinyl chloride , methylene , polymer , doping , chloride , scattering , optics , analytical chemistry (journal) , optoelectronics , composite material , organic chemistry , photocatalysis , chemistry , physics , copolymer , metallurgy , catalysis
Significant results of our experimental investigations on the dependence of pH on real time transmission characteristics on recording media fabricated by doping PVC with complexed methylene blue are presented. The optimum pH value for faster bleaching was found to be 4.5. In typical applications, the illumination from one side, normal to the surface of this material, initiates a chemical sequence that records the incident light pattern in the polymer. Thus direct imaging can be successfully done on this sample. The recorded letters were very legible with good contrast and no scattering centres. Diffraction efficiency measurements were also carried out on this material.
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