摘要
以四乙基溴化胺为催化剂,1,4-丁二醇为起始剂,邻苯二甲酸酐和环氧氯丙烷为原料合成聚酯树脂,采用傅立叶红外光谱(FT-IR)和核磁共振(~1H-NMR)对产物的结构进行表征,并考察了催化剂用量和反应温度对合成聚酯树脂的影响。结果表明,合成聚酯树脂的端基为羟基,且随着温度升高和催化剂用量增加,反应速率增加,合适的反应条件为温度100℃,邻苯二甲酸酐16.28g,环氧氯丙烷10 18g,1,4-丁二醇0.36g,四乙基溴化铵0.21 g,溶剂N,N-二甲基甲酰胺4mL。聚酯树脂的合成为一级反应,其表观活化能为91kJ/mol,指前因子为4 99min^(-1)。
The polyester resin was synthesized from phthalic anhydride（PA） and epichlorohydrin（ECH） over catalyst tetraethylammonium bromide（TEAB） using 1,4-butanediol（BDO） as initiator and was characterized by means of Fourier transform infrared spectroscopy （FT-IR） and nuclear magnetic resonance （^1H-NMR）. The effects of reaction temperature and catalyst dosage on synthesis of polyester resin were investigated. The results showed that the product was polyester resin with hydroxyl end group. The reaction rate increased with the increase of temperature or catalyst dosage. The appropriate reaction conditions were temperature 100 ℃, PA 16.28 g, and ECH 10.18 g, BDO 0.36 g, TEAB 0.21 g, solvent N,N-dimethylformamide 4 mL. The synthesis of polyester resin was the first-order reaction and the apparent activation energy was 91 kJ/mol, the pre-exponential factor was 4.99 min .
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2011年第4期353-357,共5页
Chemical Reaction Engineering and Technology
关键词
聚酯
动力学
反应速率
表观活化能
polyester
kinetics
reaction rate
apparent activation energy
