A—二亚胺镍催化烯烃聚合及复合材料的研究
发布时间：2018-09-01 07:22
【摘要】：石墨烯具有高比表面积,高导电率,高强度及良好的力学、热学、光学等优点,以其作为填料或结构单元与高分子聚合物复合,形成网络缔合结构,对原有材料进行修饰得到稳定性、强度及阻燃效果较好的聚合物/石墨烯复合材料。本文通过原位复合的方法得到聚烯烃/石墨烯复合材料,各项测试表明复合材料的性能较纯聚烯烃有所提高,其中聚乙烯/20wt%石墨烯的导电率在聚乙烯/石墨烯复合材料中最高,为0.15S/m;聚乙烯/5wt%石墨烯的拉伸强度在聚乙烯/石墨烯复合材料中最大,为8.3MPa。聚己烯/20wt%石墨烯的导电率在聚己烯/石墨烯中最高,为0.21S/m,聚己烯/10wt%石墨烯的拉伸强度在聚己烯/石墨烯中最大,为6.1 MPa。通过改变蒽环上的取代基,成功制备出三维几何结构的N,N-二(2,6-二异丙基)-2,6-二叔丁基蒽烯-11,12-二亚胺溴化镍(催化剂 Cat3),并研究了Cat3在不同助催化剂,压强及温度下的催化活性,其中0.5Mpa、70℃下,以DEAC为助催化剂催化乙烯聚合时的催化活性最大,为4.84×105gPE/(mol.Ni·h)。通过改变苊骨架上的取代基(苯基,对羟基苯基,对氨基苯基,对羟甲基苯基),成功合成四种α-二亚胺配体,其中以对羟基苯基和对羟甲基苯基为取代基,成功制备出N,N-二(2,6-二异丙基苯基)-5,6-二(4-对羟基苯基)苊烯-1,2-二亚胺溴化镍(Cat4)与N,N-二(2,6-二异丙基苯基)-5,6-二(4-对羟甲基苯基)苊烯-1,2-二亚胺溴化镍(催化剂Cat5),通过实验数据表明这两种催化剂在较高温度70-80℃时依然具有较好的催化活性。Cat4、Cat5在0.5MPa,DEAC为助催化剂,均在50℃聚合温度条件下到最大催化活性,分别为3.72×106gPE/(mol·Ni·h)、3.84×106gPE/(mol.Ni.h)。通过改变亚胺配体上的取代基合成出两种新型α-二亚胺配体,并成功制备出N,N-二(2,6-二苯甲基-4-甲基)-5,6-二(4-对羟甲基苯基)苊烯-1,2-二亚胺溴化镍(催化剂Cat6)后过渡金属催化剂,通过实验数据表明这种催化剂在较高温度70-80℃时依然具有较好的催化活性。Cat6以DEAC为助催化剂,0.5MPa,80℃聚合温度下催化乙烯聚合0.5h的催化活性最高,为4.66×106gPE/(mol·Ni·h)。
[Abstract]:Graphene has the advantages of high specific surface area, high conductivity, high strength and good mechanical, thermal and optical properties. The polymer / graphene composites with better stability, strength and flame retardancy were obtained by modifying the original materials. In this paper, polyolefin / graphene composites were obtained by in-situ recombination. The results show that the properties of the composites are better than those of pure polyolefin, and the conductivity of polyethylene / 20wt% graphene is the highest in polyethylene / graphene composites. The tensile strength of polyethylene / 5 wt% graphene was the highest in polyethylene / graphene composite, 8.3 MPA. The conductivity of polyhexene / graphene was the highest in polyhexene / graphene, 0.21s / m, and the tensile strength of polyhexene / graphene / graphene was 6.1 MPa.. By changing the substituent group on anthracycline, the three dimensional geometry Nndi (2O6-diisopropyl) -2O6-tert-Ding Ji anthrone 12-diimide nickel bromide (Cat3) was successfully prepared, and the catalytic activity of Cat3 at different cocatalyst, pressure and temperature was studied. The maximum catalytic activity of 0.5 MPAN was 4.84 脳 105gPE/ (mol.Ni h).) when DEAC was used as co-catalyst for ethylene polymerization at 70 鈩，
本文编号：2216506
[Abstract]:Graphene has the advantages of high specific surface area, high conductivity, high strength and good mechanical, thermal and optical properties. The polymer / graphene composites with better stability, strength and flame retardancy were obtained by modifying the original materials. In this paper, polyolefin / graphene composites were obtained by in-situ recombination. The results show that the properties of the composites are better than those of pure polyolefin, and the conductivity of polyethylene / 20wt% graphene is the highest in polyethylene / graphene composites. The tensile strength of polyethylene / 5 wt% graphene was the highest in polyethylene / graphene composite, 8.3 MPA. The conductivity of polyhexene / graphene was the highest in polyhexene / graphene, 0.21s / m, and the tensile strength of polyhexene / graphene / graphene was 6.1 MPa.. By changing the substituent group on anthracycline, the three dimensional geometry Nndi (2O6-diisopropyl) -2O6-tert-Ding Ji anthrone 12-diimide nickel bromide (Cat3) was successfully prepared, and the catalytic activity of Cat3 at different cocatalyst, pressure and temperature was studied. The maximum catalytic activity of 0.5 MPAN was 4.84 脳 105gPE/ (mol.Ni h).) when DEAC was used as co-catalyst for ethylene polymerization at 70 鈩，
本文编号：2216506
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