摘要
采用挤出-拉伸工艺制备了高密度聚乙烯(HDPE)/聚酰胺6(PA6)原位微纤共混物,探索了单螺杆挤出机的螺筒温度、螺杆转速、PA6用量及热拉伸比对产物微纤形成、熔体流动速率(MFR)和应力应变性能的影响。结果表明,PA6质量分数在5%～20%,HDPE/PA6在200,230,250,210℃(机头)的挤出机中熔融挤出,螺杆转速20～50r/min,料条经15℃水浴短时间冷却,再在70～75℃的空气中进行热拉伸,可以在HDPE连续相中形成直径5～10μm的PA6微纤。随PA6用量增加,HDPE/PA6原位微纤共混物的MFR急剧降低,拉伸强度显著提高,形成的微纤能够显著增强HDPE。
In situ micro-fibrillar blend based on HDPE and PA6 was prepared through melt extrusion-stretching processing. The effects of barrel temperature, screw speed of screw extruder, content of PA6, hot-stretching ratio on the formation of micro-fibrillar, MFR and stress-strain performance were studied. The results show that PA6 miero-fibrillar in 5-10 /2m diameter is formed in HDPE continuous phase when mass ratio of PA6 is 5-20%, extrusion temperature of screw extruder is 200, 230, 250, 210℃（die head）, screw speed is 20-50 r/min, extrudate strip is stretched in 70-75℃ hot air after cooled in 15℃ water bath. PA6 micro-fibrillar formed enhances mechanical properties of HDPE indeed because the tensile strength of HDPE/PA6 micro-fibrillar blend increases apparently and MFR decreases with increasing content of PA6.
出处
《现代塑料加工应用》
CAS
北大核心
2013年第3期5-8,共4页
Modern Plastics Processing and Applications
关键词
高密度聚乙烯
聚酰胺6
原位微纤
拉伸比
挤出拉伸
high density polyethylene
polyamide 6
in situ micro-fibrillar stretching ratio
extrusion-stretching
