Yang Jin-fei
2010
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Journal
Contemporary Chemical Industry
Abstract
The synthetic method of oligomeric biphenyl bis(diphenyl phosphate) from 4,4'-Dihydroxy-biphenyl,phosphorus oxychloride and phenol was studied.The effects of reactants molecular ratio,reaction temperature and reaction time on reaction yield were studied.The results show that optimum reaction conditions are as follows:phosphorus oxychloride︰4,4'-Dihydroxy-biphenyl︰phenol=6︰l︰4.1(molar ratio),reaction temperature is 105~120 ℃ and reaction time is 4 h at the condensation stage.At the end capping stage,reaction temperature is 120~150 ℃,and reaction time is 5 h,AlCl3 is the best catalyst,and its dosage is 2% of 4,4'-dihydroxy-biphenyl amount.Under the optimum reaction conditions,yield of the product can be up to 82.1%.Chemical structure of the product was confirmed by IR and elemental analysis.TG test shows that it has high resistance to heat.