异辛酸铁/三异丁基铝/亚磷酸二乙酯催化丁二烯-异戊二烯共聚合

摘要

The copolymerization of butadiene (Bd) and isoprene (Ip) was catalyzed with iron 2-ethylhexanoate(simplified as Fe)/ triisobuty-laluminum(simplified as Al)/diethyl phosphate (DEP)catalytic system.The effects of amount of Al and DEP and monomer ratio on the copolymerization were investigated.The results showed that Bd/Ip copolymerization in hexane could be catalyzed by Fe/ Al/DEP catalytic system at 50 ℃ in hexane,and the yield of the copolymerization increased firstly and then decreased with increasing amount of Al and DEP.The highest yield of the copolymer was 82.9％ when the mole ratio of Al/Fe was 10 and DEP/Fe was 2.When the mole ratio of Al/Fe was lower,the copolymer had a single glass transition temperature which indicated it was random copolymer.%以异辛酸铁(简称Fe)/三异丁基铝(简称Al)/亚磷酸二乙酯(DEP)为催化剂催化丁二烯(Bd)与异戊二烯(Ip)共聚,考察了Al用量、DEP用量及单体配比对Bd-Ip共聚合的影响.结果表明,由Fe/Al/DEP组成的催化剂可在己烷中于50℃下催化Bd与Ip共聚,共聚物收率随Al和DEP用量的增加后下降.当Al/Fe(摩尔比)为10、DEP/Fe(摩尔比)为2时,共聚物收率最高为82.9％.当Al/Fe较低时,共聚物仅有1个玻璃化转变温度,为无规共聚物.