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选用芴基胺基二甲基钛配合物为主催化剂,在改性烷基铝氧烷(MMAO)和2,6-二异丙基苯酚(BHT)的活化下,进行了乙烯与1-十二烯的共聚。结果表明:芴基上引入叔丁基、胺基上引入金刚烷基的芴基氨基二甲基钛配合物对乙烯/1-十二烯的共聚表现出高活性;共聚活性随着Al与Ti物质的量比的增大逐渐上升,当Al与Ti物质的量比为1000时,达到最高活性,为2600 kg Polymer/(mol Ti·h),所得共聚物的重均分子质量最高达到2.7×10~6g/mol,当1-十二烯添加量为6.8 mmol时,共聚物中1-十二烯的插入率达到0.34%,此时共聚物的熔点为124.6℃。
Using fluorenyl amido dimethyl titanium complex as the main catalyst, under the activation of modified alkylalumoxane (MMAO) and 2,6-diisopropylphenol (BHT), ethylene and 1- Copolymerization of dienes. The results showed that the copolymerization of ethylene / 1-dodecene with tert-butyl group on the fluorenyl group and the fluorenyl aminomethyltitanium complex with adamantyl group on the amine group showed high activity. The copolymerization activity increased with the increase of Al and Ti The mass ratio of the material increased gradually. When the molar ratio of Al to Ti was 1000, the highest activity reached 2600 kg Polymer / (mol Ti · h), and the weight average molecular weight of the copolymer reached 2.7 × 10 ~ 6g / mol. When the amount of 1-dodecene was 6.8mmol, the insertion rate of 1-dodecene in the copolymer reached 0.34%, and the melting point of the copolymer was 124.6 ℃.