Abstract
Bright red pigments, based on montmorillonite (MM) intercalated with rhodamine 6G (R6G) have been developed for the purpose of pigmenting polyethylene-based polymers. The cationic dye R6G was intercalated into NH + 4 -saturated MM in a slightly acidic medium. The resultant inorganic-organic MM complex was characterized using X-ray diffraction, thermogravimetric analysis, Fourier transform infrared (FTIR) spectra, diffused reflectance, and color measurements. Expansion in basal spacing from an initial 11.3 to ∼ 15.8 A was detected in the X-ray profile, confirming clay intercalation with R6G. The average particle size of the intercalated clay was 35 nm as measured by photon scattering. Frequency shifts of the C-H bending vibration from 724 to 744 cm -1 and that of the carbonyl (>C = O) stretching vibration from 1647 to 1666 cm -1 have been observed as a result of intercalation in FTIR spectra. Improvement in thermal stability for the intercalated MM was indicated by results from thermal analysis. The intercalated colored polyethylene-pigment showed enhanced stability under exposure to ultraviolet radiation of wavelength of 200-400 nm. The values for color coordinates were a* = 53.45 and b* = 9.62 from the color measurements.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
