A series of hyperbranched poly (amine-ester)polyols were synthesized by the polycondensation of N, Ndiethylol- 3- amine-methylpropionate (prepared by Michael ad
Malleable iron lost the interest and the development stopped in the turbulent seventies of tremendous developments of new technologies.The personal computer,emi
Water-assisted injection molding(WAIM), an innovative process to mold plastic parts with hollow sections, is characterized with intermittent, periodic process a