缚酸剂对合成N,N′-二环己基对苯二甲酰胺的影响及其应用  

Effects of Acid Binding Agents on Synthesis of N,N′-Bis-(Cyclohexyl)-Terephthalamide

作　　者：徐耀辉[1,2] 杜洪光[1] 顾民[2] 

机构地区：[1]北京化工大学理学院,北京100029 [2]中国石化北京化工研究院,北京100013

出　　处：《石油化工》2013年第10期1148-1153,共6页Petrochemical Technology

摘　　要：以对苯二甲酰氯和环己胺为原料，添加缚酸剂，合成了N，N＇-二环己基对苯二甲酰胺。考察了缚酸剂的种类及用量对产物收率的影响；并以N，N＇-二环己基对苯二甲酰胺为β成核剂对聚丙烯进行改性，考察其对聚丙烯性能的影响。实验结果表明，以甲苯为溶剂，以吡啶、三乙胺或三乙胺-吡啶（n（吡啶）：n（三乙胺）=0．10）为缚酸剂时，适宜的合成条件为：110．6℃、6．0～6．5h、n（甲苯）：n（对苯二甲酰氯）=36．2、n（缚酸剂）：n（对苯二甲酰氯）=2．4～2.8；以吡啶为溶剂（又为缚酸剂）时，适宜的合成条件为：115．2℃、4．5h、n（吡啶）：n（对苯二甲酰氯）=20．0；与不使用缚酸剂相比，添加缚酸剂可使产物收率从58．0％提高至75．9％～81．7％；采用添加缚酸剂合成的N，N＇-二环己基对苯二甲酰胺为B成核剂时，可使聚丙烯的抗冲强度从3．95kJ／m^2提高至15．80kJ／m^2。A β-nucleating agent used in polypropylene, N, N＇-bis-（cyclohexyl）-terephthalamide, was synthesized from cyclohexylamine and terephthaloyl chloride by adding acid binding agents. The influences of type and dosage of the acid binding agents on the product yield were studied. The modification of polypropylene with the β-nucleating agent was investigated. The results showed that, when methylbenzene was used as solvent, and pyridine, triethylamine or pyridine-triethylamine complex was used as acid binding agent, the optimum reaction conditions were 110.6 ℃, 6.0-6.5 b, n（methylbenzene） ： n（terephthaloyl chloride） 36.2, n（acid binding agents） ： n（terephthaloyl chloride） 2.4-2.8; when pyridine was used as both acid binding agent and solvent, the optimum reaction conditions were 115.2 ℃, 4.5 h, n（pyridine） ： n（terephthaloyl chloride） 20.0. Compared with that of no any acid binding agent, the β-nucleating agent yield was increased from 58.0% to 75.9%- 81.7%, and the impact strength of polypropylene was improved from 3.95 to 15.80 kJ/m2 by using the β-nucleating agent synthesized with the acid binding agents.

关 键 词：缚酸剂 Β成核剂 吡啶 三乙胺 N N'-二环己基对苯二甲酰胺 

分 类 号：TQ246.2[化学工程—有机化工]