Abstract
Fluorescence depolarization is used to investigate the motions of four rigid probes of different sizes, 9,10-dimethylanthracene (DMA), 1,4-diphenylbutadiene (DPBD), 1,6-diphenylhexatriene (DPHT), and 1,8-diphenyloctatetraene (DPOT) inserted in a polyisoprene (IR 307), two polybutadienes (Diene 45 NF and Solprene 248) and three random butadiene-styrene copolymer matrices. Fluorescence anisotropy decay experiments have revealed that these motions follow the isotropic motional model. The correlation times were calculated, using this model, from stationary fluorescence depolarization measurements as a function of temperature. Large probes are shown to reflect the glass-rubber relaxation in agreement with the WLF law. The size dependence of the probe correlation times is also analysed.
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.
