三光气合成四溴双酚A聚碳酸酯

STUDY ON TBBPA-PC SYNTHESIZED BY TRIPHOSGENE AND TETRABROMOBISPHENOL A

以三光气(BTC)和四溴双酚A(TBBPA)为原料,经界面缩聚合成了高分子量四溴双酚A聚碳酸酯。以提高分子量及产率为目的,优化了反应温度、催化剂用量、原料摩尔比等反应条件。用红外光谱和核磁共振谱表征聚合物结构,用黏度法测定产物特性黏数,用凝胶渗透色谱法(GPC)分析了产物的分子量构成特性。结果表明:就分子量与产率而言,均有一最佳反应温度;BTC过量14%时得到的分子量最高;催化剂用量为四溴双酚A摩尔量的1.5%时分子量和产率最高。

Tetrabromobisphenol-A polycarbonate （TBBPA-PC） was synthesized by interfacial polymerization with triphosgene （BTC） and tetrabromobisphenol A （TBBPA） as raw materials. The structure of TBBPA-PC was testified by FT-IR and 1H-NMR. Viscosity method and gel permeation chromatography （GPC） were used to measure intrinsic viscosity and the molecular weights. Reaction temperature and the molar ratios of BTC/TBBPA and catalyst/TBBPA were investigated to control molecular weights and increase production yields. As is shown by GPC resuits, the molecular weight（Mw） reaches 2. 6×10^5 Production yields reaches as high as 80% under optimized condictions.