化学工程2011，Vol.39Issue(5)：23-26,35,5.
β-二酮铝和β-二酮酯铝催化合成聚对苯二甲酸乙二醇酯
Catalytic synthesis of poly( ethylene terephthalate) in presence of aluminumβ-diketones and aluminum β-ketoesters
摘要
Abstract
Poly ( ethylene terephthalate) (PET) was prepared from purified terephthalic acid (TPA) and ethylene glycol (EG) with self-made aluminumβ-diketones and aluminumβ-ketoesters as catalyst via esterification and polycondensation. The effects of reaction conditions on the synthesis were discussed. The results show that aluminum acetylacetonate and aluminum β-ketoesters have higher catalytic activity than other aluminum β-diketones. The PET with intrinsic viscosity of 0.82 dL/g, diethylene glycol (DEG) of 8.5 mol/t and carboxyl terminal group value of 66.36 μmol/g can be produced under the conditions as follows: molar ratio 1.2∶ 1 of EG to TPA, catalyst content of 0. 5％ based on 1 mol TPA, esterification temperature 260 ℃, polycondensation temperature 280 ℃. The catalytic mechanism of aluminumβ-diketones and β-ketoesters was proposed to explain these observations. PET sample and catalyst were characterized by infrared spectrophotometer (FTIR) and nuclear magnetic resonance (NMR).关键词
β-二酮铝/β-二酮酯铝/聚对苯二甲酸乙二醇酯/对苯二甲酸/乙二醇Key words
aluminumβ-diketones/ aluminumβ-ketoesters/ poly ( ethylene terephthalate )/ terephthalalic acid/ethylene glycol分类
化学化工引用本文复制引用
萧斌,王丽苹,梅仁浩,王公应,吴集钱,贾树勇,王越..β-二酮铝和β-二酮酯铝催化合成聚对苯二甲酸乙二醇酯[J].化学工程,2011,39(5):23-26,35,5.基金项目
江苏省科技支撑计划资助项目(BE2010065) （BE2010065）
