摘要
研究了四溴双酚A的合成条件 ,并利用TG DTA热分析技术研究了其阻燃过程的木炭产量和热动力学参数。结果表明 ,合成条件由室温改为冰水浴时 ,四溴双酚A产率由 70 .7%提高到 85 .6 % ,溴含量由5 4 .1 %提高到 5 5 .4 % ;溶剂由无水乙醇改为苯时 ,产率由 85 .6 %提高到 93.4 % ,原料配比由 1∶2改为 1∶2 .4时 ,产率由 93.4 %提高到 94 .2 % ,溴含量由 5 6 .1 %提高到 5 8.8% ,熔程为 1 79.0～ 1 81 .3℃。杉木经四溴双酚A处理后 ,产炭率由 31 .2 %提高到 4 5 .4 %。淋洗实验表明 ,磷酸氢二铵处理杉木的产炭损失率达 2 6 .7% ,而四溴双酚A处理的产炭损失率只有 4 .2 7%。因此 ,合成四溴双酚A的最佳条件是在冰水浴中 ,以苯作溶剂 ,双酚A与溴的原料配比为 1∶2 .2～ 2 .4。在阻燃过程中四溴双酚A能改变木材热解过程和机理 ,不仅对木材具有较强的阻燃作用 。
The synthetic conditions of tetrabromobisphenol A were studied.Char yield and thermokinetic parameters during pyrolysis of wood treated with tetrabromobisphenol A were studied by TG-DTA method.Results showed that tetrabromobisphenol A yield increased from 70.7% to 85.6%,and bromine content increased from 54.1% to 55.4% as the condition was converted from room temperature to ice-water bath.The yield increased from 85.6% to 93.4% as benzene was used as a solvent to replace alcohol.The yield increased from 93.4% to 94.2%,bromine content increased from 56.1% to 58.8% and melting point reached 179.0-181.3 ℃ as the dosage of raw materials changed from 1∶2 to 1∶2.4.The char yield increased from 31.2% to 45.4%, after Cunninghamia lanceolata wood was treated with tetrabromobisphenol A.By elution experiment,char yield loss of wood treated by ammonium phosphate is 26.7%,compared to 4.27% by tetrabromobisphenol A.Optimum synthetic condition of tetrabromobisphenol A is in ice-water bath with benzene as solvent by raw material ratio 1∶2.2-2.4.The pyrolysis process of wood can be changed by tetrabromobisphenol A during fire-retarding process.Tetrabromobisphenol A possesses not only strong fire-retarding ability on wood but also strong resistance against leaching.
出处
《林产化学与工业》
EI
CAS
CSCD
2002年第2期31-34,共4页
Chemistry and Industry of Forest Products
基金
中南林学院青年科学基金资助项目 ( 95 0 30 9
0 2 0 4 2 3)
