反应挤出制备i PB-g-GMA的工艺与性能

Process and Properties of i PB-g-GMA Prepared by Reactive Extrusion

以全同立构聚丁烯-1(i PB-1)、过氧化二异丙苯、苯乙烯和甲基丙烯酸缩水甘油酯(GMA)为原料,采用双螺杆挤出机制备i PB-g-GMA。结果表明:GMA的接枝率在挤出温度190℃时最高,接枝率随主机螺杆转速的增加呈波动性变化,熔体流动速率(MFR)在转速为60 r/min时最大。随着挤出温度的升高,接枝物拉伸性能降低,弯曲性能、缺口冲击强度和邵氏硬度等均略有下降;转速增加使其弯曲性能、缺口冲击强度和邵氏硬度等力学性能均略有增强。

Using isotactic polybutene-1(i PB-1),dicumyl peroxide,styrene and glycidyl methacrylate(GMA)as the raw material,i PB-g-GMA was prepared by reactive extrusion in a twin-screw extruder.The results show that the grafting rate of GMA is the highest when extrusion temperature is 190℃.The grafting rate fluctuates with the increase of screw speed,and the melt flow rate(MFR)of the graft is the maximum at 60 r/min.With the increase of extrusion temperature,the tensile properties of the graft decrease,while the bending properties,notch impact strength and Shore hardness decrease slightly.The mechanical properties such as bending properties,notch impact strength and Shore hardness are slightly enhanced with the increase of rotational speed.