SYNTHESIS AND CHEMICAL MODIFICATINON OF NOVOLAC VIAINCORPORATION OF SILICON, PHOSPHOROUS, BORON, SULFUR ANDSOME ORGANIC COMPOUNDS

Abstract

Abstract
Two types of novolac were prepared, namely / random (o,p-) and (o.o-) novolac. The prepared
resins were modified by three methods, the first one includes esterification of phenolic hydroxyl
groups in the prepared resins via their treatment with adipoyl chloride and urethane derivative by
the reaction of toluene diisocyanate with resins . While the second modification includes
incorporation of phosphorous, silicon, and boron into the novolac structure via reaction of P2O5
SiCl2(CH3)2, SiCl2(C6H5)2 and Ba(OH)2 with novolac, Sulfure was incorporated into the novolac
structure by preparation of 3,3,5,5 tetra methylo1-4,4-dihydroxy diphenyl sulfone which then
reacted with o,o- novolac and the third modification includes reaction of benzyl chloride with
sodium salt of novolac and structure contains benzylic ether were obtained.
All prepared products were characterized by IR. HNMR, thermal analysis and some physical
properties.