Fabrication and characterization of thermally conductive composites based on poly(butylene terephthalate)/glass fiber-silicon carbide

Abstract

<jats:title>Abstract</jats:title> <jats:p>A new method is reported for preparing poly(butylene terephthalate) (PBT)<jats:bold>/</jats:bold>glass fiber (GF)-silicon carbide (SiC) composites. GFs were coated with SiC particles firstly and then the treated GFs (GF-SiC) were mixed with PBT. Scanning electron microscopy (SEM) images showed that some SiC particles dispersed on the surfaces of GFs, and other particles fell off from surfaces of GFs and dispersed around GFs after processing. The thermal conductivities of composites are increased with increase of GF-SiC. At 30 wt% GF-SiC, the thermal conductivity of composites reached 0.6392 W/mK, which improved nearly 160% compared to that of neat polymer. Differential scanning calorimetry (DSC) results indicated that GF-SiC increased crystallinity of PBT compared with that of neat PBT and had no obvious influence on the melting temperature of PBT. The crystallization temperature (T<jats:sub>c</jats:sub>) and glass transition temperature of all samples shifted to a higher temperature. The addition of GF-SiC can improve the thermal stability of PBT/GF-SiC composites obviously. Dynamic mechanical properties and dielectric properties were also discussed in this paper.</jats:p>

The mechanical and thermal properties of chopped basalt fiber-reinforced poly (butylene terephthalate) composites: Effect of fiber amount and length

“…1,2 To improve mechanical and thermal properties, glass fiber is the most widely used reinforcing material in PBT and its blends. 3–21…”

Flame-retardant properties and mechanism of LGF/PBT/DOPO-HQ-conjugated flame-retardant composites

“…This makes them extremely dangerous for fire safety in applications ( Zhu et al, 2017 ; Niu et al, 2018 ). Among the glass fiber reinforced PBT composites, long glass fiber reinforced PBT composites can achieve higher strength, modulus, dimensional stability, and thermal stability than short glass fiber reinforced PBT composites ( Cai et al, 2015 ; Suzanne et al, 2017 ). However, LGF/PBT composites are still very flammable, so they need to be modified with flame retardants.…”