降冰片烯的合成与精制
Synthesis and purification of norbornene
降冰片烯(NB)作为合成环烯烃共聚物(COC)与环烯烃聚合物(COP)的关键单体,因其赋予材料高透明度、耐热性和化学稳定性,在医药包装、光学器件以及药物中间体等领域的应用需求快速增长。采用双环戊二烯(DCPD)与乙烯为原料,开发了一套液相合成NB工艺。优化后工艺条件为:溶剂甲苯、反应温度240℃、反应压力5 MPa、DCPD与甲苯质量比为1∶4。工艺优化后,NB的收率达到91.79%,选择性95.34%,精制后NB纯度可达99.5%。相比气相法,液相工艺降低了合成NB工艺的压力和温度。
Norbornene (NB),as a crucial monomer for synthesizing cycloolefin copolymers (COC) and cycloolefin polymers (COP),has witnessed a rapidly increasing demand in applications such as medical packaging,optical devices,and pharmaceutical intermediates.This is attributed to its capacity to endow materials with high transparency,heat resistance,and chemical stability.A liquid-phase synthesis process for NB was developed using dicyclopentadiene (DCPD) and ethylene as raw materials.The optimized process conditions are as follows:the solvent is toluene,the reaction temperature is 240℃,the reaction pressure is 5 MPa,and the mass ratio of DCPD to toluene is 1∶4.After the process optimization,the yield of NB reaches 91.79%,the selectivity is 95.34%,and the purity of NB after purification can reach 99.5%.Compared with the gas-phase method,the liquid-phase process reduces the pressure and temperature requirements of the NB synthesis process.
环烯烃共聚物 / 环烯烃聚合物 / 双环戊二烯 / 降冰片烯 / 液相工艺
cycloolefin copolymers / cycloolefin polymers / dicyclopentadiene / norbornene / liquid-phase process
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国家自然科学基金资助项目(22378026)
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