Abstract
DOPO and silicon containing agents modified multiwalled carbon nanotubes (MCNTs) were synthesized through sol-gel process and MCNTs are introduced into polystyrene (PS) through in situ polymerization. TEM observations and FTIR results of MCNTs demonstrated that the MCNT nanofillers were coated with the organic/inorganic flame retardant compound. Moreover, the TEM results of the composites indicate that MCNTs dispersed in polystyrene PS matrix uniformly due to the modification. The PS/MCNTs composites showed improved thermal stability as well as flame retardant properties in comparison with PS/CNTs composites, which are due to the good dispersion of MCNT in the PS matrix. MCNTs in the PS matrix can also reduce the peak heat release rate, total heat release and improve the smoke suppression performance. The improved flame retardant properties are attributed to the char reinforcing effect of CNTs, which can provide enough time for MCNTs and organic/inorganic compound to trap the degradation of polymer chains and catalyze the formation of char. The char layers can not only serve as an efficient insulating barrier to reduce the exposure of PS matrix to heat source but also retard the releasing of combustible gas.
Highlights
Since 1991, carbon nanotubes (CNTs) have became a major interest of research all over the world
The CNTs and multiwalled carbon nanotubes (MCNTs) were well-dispersed in THF, exhibiting the black color
After 2 h, the CNTs precipitated at the bottom while MCNTs were well-dispersed in THF, which are due to the attractive force between the polar organic groups on the surface of MCNTs and organic solution
Summary
Since 1991, carbon nanotubes (CNTs) have became a major interest of research all over the world. It’s found that the boundary of MCNTs are obscure and the MCNTs are dispersed well in the PS matrix, which are due to the modification of CNTs with the organic/inorganic flame retardants. The DOPO based organic/inorganic compounds on the surface of CNTs have significant influence on the dispersibility of MCNTs in THF.
Sign-in/Register to view highlights & summary 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.
