高韧性高流动性合金制备及性能(3)
图4 不同润滑剂种类合金的MFR
综上所述,通过优选质量分数为50%的PA66 EP-158 和选用脂肪族酰胺类润滑剂C,兼顾了合金的力学性能特别是缺口冲击强度和流动性能,成功应用在汽车行业的复杂结构件中。
3 结论
(1)熔融共混挤出自制PPE-g-MAH,通过调节PPE-g-MAH/PA66 的比例,当PA66 质量分数为50%时,合金的缺口冲击强度能达到最大值;
(2)通过筛选PA66 种类,优选黏度为2.7 的PA66 EP-158 后,合金的缺口冲击强度最高,但流动性降低;
(3)为了进一步提高PPE/PA66 合金的流动性,通过筛选不同类型的润滑剂,加入脂肪族酰胺类润滑剂在不明显降低合金力学性能的情况下,可大幅度提高合金材料的流动性能,由原来的30 g/10 min 提高到65 g/10 min。从而制备了高韧性高流动性的PPE/PA66 合金。
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