【摘要】 采用熔融接枝的方法 ,在双螺杆挤出机中用 2 ,3-二甲基 -2 ,3-二苯基丁烷 (DMDPB)和过氧化二异丙苯(DCP)两种不同的引发剂将马来酸酐 (MAH)接枝到线形低密度聚乙烯 (LLDPE)上。用二甲苯溶解 -丙酮抽提 (或沉淀 )法处理接枝物 ,用红外光谱证实了在新型引发剂DMDPB的引发下 ,马来酸酐成功地接上了PE。用化学实验方法定量测定了接枝率的大小和凝胶含量 ,结果发现DMDPB引发的接枝物无凝胶现象。通过熔体流动速率的测定说明了接枝物加工性能的优劣。并对两种引发剂做进一步的比较。更多还原

【Abstract】 Linear low density polyethylene (LLDPE) grafted by anhydride (MAH) in a twin screw extruder with 1,1’-(1,1,2,2-tetranethyl-1,2-ethanediyl) bisbenzane (DMDPB) and dicumyl peroxide (DCP) as initiators was dealt with the resultant graft polymer was dissolved by dimethyl benzene and extracted by acetone.Infrared spectroscopy testify that MAH was grafted onto PE successfully under the initiation of the new initiator DMDPB.It is found that gel did not appear in the DMDPB initiated graft polymer.Advantages and disadvantages of the processability of the graft polymer were compared by melt flow rate,furthermore the two initiators were compared also.The degree of grafted MAH (Gx), gel fraction of crosslinked product and melt index was tested quantiatively by chemical experiments.更多还原