摘要
利用普通单螺杆挤出机,在挤出高密度聚乙烯（HDPE）过程中,混入的CaCO_3与酸进行化学反应,生成CO_2等气体,从而连续地制备出HDPE微泡塑料,研究了己二酸用量和螺杆转速对泡孔平均直径和泡孔密度的影响。结果表明：最适宜的酸是己二酸,最佳的质量分数为0.6%～1.0%,可将其先制备成聚乙烯基的母粒,再与HDPE粒料、CaCO_3母粒进行初混,然后在螺筒温度为175,190,200,160℃（机头）,螺杆转速为60 r/min的单螺杆挤出机中进行熔融挤出,可以制备泡孔平均直经约为150μm的HDPE微泡塑料。
High density polyethylene（HDPE）microcellular plastics was prepared continuously through reaction of calcium carbonate and acid to generate CO_2 in situ during extrusion with a single screw extruder. The impact of adipic acid and screw speed on the average diameter and density of foaming cell are investigated. The results show that adipic acid is the most suitable acid and the optimal mass ratio is 0.6% to 1.0%. It can be used as masterbatch in polyethylene resin,then mixed with HDPE/Ca CO3 masterbatch to produce HDPE microcellular plastics with average cell diameter in 150 um in the process of melting extrusion from a single screw extruder under barrel temperature of 175,190,200,160 ℃（head）and screw speed at 60 r/min.
出处
《合成树脂及塑料》
CAS
北大核心
2016年第3期1-5,共5页
China Synthetic Resin and Plastics
关键词
高密度聚乙烯
微泡塑料
碳酸钙
己二酸
high density polyethylene
microcellular plastics
calcium carbonate
adipic acid
