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SYNTHESIS AND CHEMICAL MODIFICATINON OF NOVOLAC VIAINCORPORATION OF SILICON, PHOSPHOROUS, BORON, SULFUR ANDSOME ORGANIC COMPOUNDS | ||
| Journal of Al-Nahrain University - Science | ||
| Article 1, Volume 12, Issue 4, 2009, Pages 58-71 | ||
| Authors | ||
| Ghada H.Al-Farajy; Entesar O.Al-Tamimi; Thanun M.Pyriadi | ||
| Abstract | ||
| AbstractTwo types of novolac were prepared, namely / random (o,p-) and (o.o-) novolac. The preparedresins were modified by three methods, the first one includes esterification of phenolic hydroxylgroups in the prepared resins via their treatment with adipoyl chloride and urethane derivative bythe reaction of toluene diisocyanate with resins . While the second modification includesincorporation of phosphorous, silicon, and boron into the novolac structure via reaction of P2O5SiCl2(CH3)2, SiCl2(C6H5)2 and Ba(OH)2 with novolac, Sulfure was incorporated into the novolacstructure by preparation of 3,3,5,5 tetra methylo1-4,4-dihydroxy diphenyl sulfone which thenreacted with o,o- novolac and the third modification includes reaction of benzyl chloride withsodium salt of novolac and structure contains benzylic ether were obtained.All prepared products were characterized by IR. HNMR, thermal analysis and some physicalproperties. | ||
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