Microspheres polyacrylonitrile

Novolac and resol cold hardening oligomers habe been used 19-75-99). In the case of resol foams the process technology is not different from that used for epoxy foams. Glass, phenolic resins, carbon, polystyrene, polyacrylonitrile and poly(vinylidene chloride) microspheres have been used as fillers ... 

CdS and CdS/polyacrylonitrile (PAN) nanocomposites were prepared by y-irradiation and emulsion polymerization by different groups (Qiao et al. 2000, Choi et al. 2003). In photoluminescence spectroscopy analysis, the maximum peak of CdS/PAN nanocomposites prepared by y-irradiation and emulsion polymerization was at about 485 nm, whereas the maximum peak of CdS nanocomposites was at about 460 nm. CdS-polystyrene nanocomposite microspheres were fabricated by gamma-ray irradiation (Wu et al. 2003). Dispersion polymerization induced by gamma-ray irradiation was exploited to prepare monodispersed polystyrene microspheres and CdS nanoparticles were generated on the polystyrene microsphere surface via subsequent precipitation reaction of Cd + with S released from the decomposition of Na2S203 upon gamma-ray irradiation (Equation 23.3). The TEM images demonstrated that well-dispersed CdS nanoparticles ( 23 nm) were attached to the surface of polystyrene microspheres of 380 nm. 

Expanding polyacrylonitrile microspheres, filled with pressurized iso-pentane which expand when the shell softens at moulding temperatures, are offered by Akzo Nobel Casco Products Division, under the Expancel name. New applications include shoe soles and slush-moulded PVCs. 

Zhang H, Xu L, Yang F, Geng L (2010) The synthesis of polyacrylonitrile/carbon nanotube microspheres by aqueous deposition polymerization under ultrasonication. Carbon 48(3) 688-695. doi 10.1016/j.carbon.2009.10.013... 

---