Polymeric tannin/furanic foams fortified with polyurethane (PUR) and 4,4’ diphenylmethane diisocyanate (pMDI) were prepared. The thermo-physical and mechanical properties of the produced foams were investigated experimentally. It was found that since there were a number of active isocyanate groups on the PUR that was used, there was no difference in adding PUR or pMDI to the foams, and so only the results for pMDI were presented. It was found that ...
Author(s): Alain Celzard, Antonio Pizzi, M. C. Basso, V. Fierro, X. Li
Metal doping of a polypyrrole matrix was carried out. Nickel and Cobalt were the two metals that were used in this study, and three samples were prepared, one containing 100% Co, one containing 50% Co and 50% Ni, and finally, one containing 100% Ni. The effective thermal conductivity and thermal diffusivity were evaluated, and it was determined that metal doping of the polymer matrix resulted in increases in both the thermal conductivity, and the ...
Author(s): K. B. Sharma, Kananbala Sharma, N. S. Saxena, Rashmi Saxena, Thaneshwar P. Sharma, Vinodini Shaktawat
Polytetramethylene ether glycol (PTMEG) was used to functionalize multi-walled carbon nanotube (MWNT) by grafting to produce MWNT-g-PTMEG. These functionalized nanotubes were then dispersed in thermoplastic polyurethane (TPU) to form a TPU/MWNT nanocomposite. It was found that the functionalization resulted in improved dispersion of the nanotubes in the TPU material. The tensile strength and elongation at break of the nanocomposite were also enhanced by the addition of the nanotubes in ...
Author(s): A. Khan, F. Piscitelli, H. Benkreira, H. S. Xia, M. Lavorgna, P. Coates, R. Patel, Y. H. Zhan
Porous epoxy thermosets were prepared using poly(ethylene glycol) (PEG) as a template. The two epoxies that were used to make the porous thermosets were diglycidylether bisphenol-A (DGEBA), and triphenylolmethane triglycidyl ether (TGTPM). Trimethylolpropane tris(poly(propylene glycol)), amine terminated)ether (T-403) was used as a hardener in producing the thermosets. The porous thermosets were then characterized to determine their structural, thermal, optical, dielectric, and mechanical properties, and the results ...
Author(s): Chang-Jian Weng, Chung-Feng Dai, Jui-Ming Yeh, Pei-Ru Li
The thermal and mechanical properties of PS/PMMA immiscible polymer blends were investigated. The effects of the dispersion of CdS nanoparticles on these properties were also investigated. The dispersion of the nanoparticles was found to result in an increase in glass transition temperature, as well as the thermal conductivity. The PS matrix was found to become more brittle and the PMMA matrix was found to become more compact upon the ...
Author(s): K. B. Sharma, Kananbala Sharma, Vishal Mathur
