有机玻璃的加工特性

Published:

2020-10-08

1.亚克力含有极性侧甲基，具有较明显的吸湿性，吸水率一般在0.3%-0.4%，成型前必须干燥，干燥条件是80℃-85℃下干燥4-5h 。

2.亚克力在成型加工的温度范围内具有效明显的非牛顿流体特性，熔融粘度随剪切速率增大会明显下降，熔体粘度对温度的变化也很敏感。因此，对于聚甲基丙烯酸甲酯的成型加工，提高成型压力和温度都可明显降低熔体粘度，取得较好的流动性。

3.亚克力开始流动的温度约160℃，开始分解的温度高于270℃，具有较宽的加工温度区间。

4.  亚克力熔体粘度较高，冷却速率又较快，制品容易产生内应力，因此成型时对工艺条件控制要求严格，制品成型后也需要进行后处理。

5.亚克力是无定形聚合物，收缩率及其变化范围都较小，一般约在0.5%-0.8%，有利于成型出尺寸精度较高的塑件。

6.亚克力切削性能甚好，其型材可很容易地机加工为各种要求的尺寸。

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