以3-（3，5-二叔丁基-4-羟基苯基）丙酸和正丁醇为原料，采用酯化反应，合成了新型受阻酚防老剂。并采用红外光谱、热重分析及荧光测试对合成的防老剂结构进行表征。结果表明，合成的防老剂是3-（3，5-二叔丁基-4-羟基苯基）丙酸正丁酯。受阻酚防老剂最佳合成实验条件是回流时间8 h、催化剂质量分数3．2％、丙酸与正丁醇物质的量比为1∶2。采用力学性能测试、红外光谱、热重分析等方法研究了受阻酚防老剂对NR硫化胶的防护性能，结果表明受阻酚防老剂对NR硫化胶有显著的防老化作用，其防老化效果优于防老剂BHT ，且对橡胶无色泽污染性。%The hindered phenolic antioxidant was synthesized with 3-(3 ,5-di-tert-butyl-4-hydroxyphenyl) propionic acid and n-butyl alcohol as raw materials by esterifying reaction .The antioxidant characterized by infrared spectroscopy and HNMR was 3-(3 ,5-di-tert-butyl-4-hydroxyphenyl) n-butyl propionate .The optimal synthesis conditions were as follows :reflux time 8 h , the molar ratio of 3-(3 ,5-di-tert-butyl-4-hydroxyphenyl) propionic acid to n-butyl alcohol 1∶2 and the catalyst amount 3 .2%on the total reacts .The effects of hindered phenolic antioxidant on the protective effect of NR vulcanizates were studied by mechanical property testing , infrared spectroscopy , thermal analysis . These results indicate that the hindered phenolic antioxidant havepronounced anti-aging properties ,which is higher than those of BHT antioxidant .Besides ,the synthesized hindered phenolic antioxidant had no color pollution for rubber .
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