AbstractA new method is reported for preparing poly(butylene terephthalate) (PBT)/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 (Tc) 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.
The damage mode and failure mechanism of the PBO composite are studied of the penetrating speed from 900 m/s to 1900 m/s, based on the dynamic response of the PBO fiber-reinforced composite target under high-speed penetration. Firstly, the mechanical properties of the projectile and the target material under high strain rate were characterized, and then the penetration of high-speed projectile into target is simulated. Finally, the penetration test is verified. The results show that the dynamic response mechanism of PBO composite target under high-speed penetration varies significantly with the penetrating speed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.