Abstract
UV-curable epoxy acrylate (EA) modified with octamercaptopropyl polyhedral oligomeric silsesquioxane (OMP-POSS) was prepared via thiol-ene photopolymerization. The study of microscale combustion indicated that EA/POSS nanocomposite displayed both the slower heat release rate and lower total heat release. The result of thermal degradation of the cured films showed that OMP-POSS had a double effect on the thermal stability of EA due to its structure containing both the relatively weak mercapto moieties and the POSS core resistant to heat shock, the derivation from the former (thioether linkages) leading to the early decomposition of the nanocomposites whereas the latter providing the well protective effects on some moieties of EA like aromatic groups and on the carbonaceous char. The analysis for the residues of EA2 with 20wt% OMP-POSS exhibited that POSS can well protect the carbonaceous char from thermal-oxidative degradation at 600°C, but do not work at 800°C.
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.
