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采用固相剪切碾磨技术制备了聚甲醛/聚氧化乙烯/二氧化硅(POM/PEO/SiO2)三元复合材料并实现其微型注塑加工,研究了POM/PEO/SiO2复合体系的微型注塑加工窗口、影响微型注塑加工过程充填行为的因素及其微型制品的复型行为。结果表明,POM/PEO/SiO2复合材料具有良好的微型注塑可加工性,根据其微型注塑加工窗口可获得复型良好的微型制品;POM/PEO/SiO2熔体在微型注塑过程中充模时间短,冷却速率快;注射速度和模腔温度对POM/PEO/SiO2体系的充填行为具有显著影响。此外,因纳米SiO2加入量较少,其对熔体充填行为的影响不大。
The POM / PEO / SiO2 ternary composites were prepared by solid-state shear milling technology and their micro-injection molding processes were carried out. The effects of micro-injection molding on POM / PEO / SiO2 composites Processing window, factors influencing the filling behavior of micro-injection molding process and the complex behavior of micro-products. The results show that the POM / PEO / SiO2 composites have good micro-injection processability, and the micro-products with good complex shape can be obtained according to the micro-injection processing window. The filling time of POM / PEO / SiO2 melt in micro- , The cooling rate is fast; injection speed and cavity temperature have significant influence on the filling behavior of POM / PEO / SiO2 system. In addition, due to the small amount of nano-SiO2, the melt filling behavior has little effect.