Abstract
ABSTRACT In this paper, the ODOPM, a kind of 9, 10-dihydro-9-oxygen-heterooxy-10-phosphoro-10-oxygen (DOPO) derivative, was obtained by hydroxylation of DOPO. Further, a phosphorus nano-flame retardant (GO-ODOPM) was obtained by addition reaction with carboxylated Graphite Oxide (GO-COOH). And then Graphene Oxide/polystyrene (GO-ODOPM/PS) composite microspheres were obtained via suspension polymerization of styrene with GO-ODOPM. The decrease of the peak heat release rate (HRR) and total heat release rate (THR) for the GO-ODOPM/PS composite microspheres was obtained when the content of the additives was only 3.0 wt% is more than 36.2% and 33.6% compared with the pure PS microspheres, respectively. Thermogravimetric (TG), dynamic rheology and carbon residue analysis were used to study the flame-retardant mechanism of GO-ODOPM in PS microspheres. The results revealed that the addition of GO-ODOPM obviously reduced the fire hazard of polystyrene (PS) microspheres. Thus, this work provided a feasible method to design efficient flame retardants for enhancing fire safety of polymers.
Highlights
As one of the five most commonly used engineering thermoplastics, polystyrene (PS) is widely used in the electrical, decorative, construction and transportation industries, and military industries, due to its lightweight, low cost, good corrosion resistance, good insulation, high transparency and easy processing [1]
The co-flame-retardant system of Graphene Oxide (GO) and ODOPM was adopted in this paper, and GO-ODOPM was applied to polystyrene microspheres through suspension polymerization to further study the thermal stability and flameretardant properties of GO-ODOPM/PS composite microspheres
A phosphorus nano-flame retardant (GOODOPM) through the functional modification of GO with DOPO was successfully fabricated, and the GOODOPM was incorporated into PS microspheres system to prepare fire-resistant GO-ODOPM/PS composite microspheres
Summary
As one of the five most commonly used engineering thermoplastics, polystyrene (PS) is widely used in the electrical, decorative, construction and transportation industries, and military industries, due to its lightweight, low cost, good corrosion resistance, good insulation, high transparency and easy processing [1]. The oxygen index, thermal stability, heat release rate and smoke density of the polymer materials were significantly improved after adding flame retardant. It is important to develop a low toxicity and good performance halogen-free flame retardant. DOPO is an important halogen-free flame retardant with low toxicity, good heat resistance and flame-retardant properties, due to its biphenyl ring and phenanthrene structure. According to research, when a small amount of graphene or its derivative is uniformly dispersed in the polymer matrix, it can effectively improve the heat resistance, mechanical and flameretardant properties of the polymer [7,8]. In order to improve the fire resistance of materials, the cooperative flame-retardant system has become a hot research direction of polymer flame retardant [9]. The co-flame-retardant system of GO and ODOPM was adopted in this paper, and GO-ODOPM was applied to polystyrene microspheres through suspension polymerization to further study the thermal stability and flameretardant properties of GO-ODOPM/PS composite microspheres
Sign-in/Register to view highlights & summary 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.
