摘要
采用双螺杆挤出机对不同熔体强度的聚丙烯树脂进行玻纤增强改性,制备了3种加工性能不同的玻纤增强聚丙烯材料。通过流变仪与熔垂法分别测试材料的熔体强度,并对这3种玻纤增强聚丙烯材料的吹塑成型性能进行了研究。结果表明:提高材料的熔体强度有利于吹塑成型加工;熔体强度最大的1#样品的吹塑成型加工窗口较宽,在190~240℃内均能顺利成型;2#样品熔体强度低于1#样品,其吹塑成型加工的窗口明显变窄,只能在190~210℃内顺利成型,当加工温度超过210℃时制件表面出现严重的波浪纹;熔体强度最低的3#样品难以通过吹塑成型制备外观良好的制件。尽管3种样品的注塑样板表面存在严重的浮纤现象,但其吹塑制件表面的浮纤现象比较轻微。
Three glass fiber reinforced polypropylene samples with different processability were prepared from polypropylene resins with different melt strength by using twin-screw extruder. The melt strength of the three glass fiber reinforced polypropylene materials was measured by rheometer or determining the height resulted from melt sagging, and the blow molding performance of the three glass fiber reinforced polypropylene materials were studied. The results show that improving the melt strength of the material is conducive to blow molding. Sample 1# with the highest melt strength shows the best blow molding performance, which can be molded successfully at a wide range of processing temperature from 190-240 ℃. The melt strength of sample 2# is lower than that of sample 1#, and the range of processing temperature is obviously narrowed, which can only be formed smoothly within 190-210 ℃, when the processing temperature exceeds 210 ℃, serious wave-like stripes appear on the surface of the workpiece. The sample 3# with the lowest melt strength is difficult to prepare the parts with good appearance by blow molding. Although there is serious floating fiber phenomenon on the surface of injection molding template of three samples, the floating fiber phenomenon on the surface of blow molded parts is relatively slight.
作者
倪梦飞
李国明
NI Mengfei;LI Guoming(Jiangsu Kingfa Sci.&Tech.Advanced Materials Co.,Ltd.,Kunshan 215300,Jiangsu Province,China;Shanghai Kingfa Sci.&Tech.Dvpt.Co.,Ltd.,Shanghai 201714,China)
出处
《上海塑料》
2021年第6期41-47,共7页
Shanghai Plastics
关键词
玻纤增强聚丙烯
吹塑成型
熔体强度
浮纤
glass fiber reinforced polypropylene
blow molding
melt strength
fiber floating
