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| 分类标准 | 类型 | 描述 | 常见例子 |
|---|---|---|---|
| 热行为 | 热塑性塑料 (Thermoplastics) | 加热时软化或熔化,冷却后变硬,这个过程可以反复进行,材料可回收利用。 | PE、PP、PVC、PS、ABS、PC、PA |
| 热固性塑料 (Thermosetting Plastics) | 首次加热时可以塑化,但一旦固化成型后,再次加热也不会熔化,不可回收再利用。 | 酚醛树脂(电木)、环氧树脂、氨基塑料 | |
| 结晶状态 | 结晶性塑料 (Crystalline Plastics) | 分子排列规整,有明确的熔点,通常不透明。 | PE、PP、POM、PA、PET、PBT |
| 无定形/非结晶性塑料 (Amorphous Plastics) | 分子排列无序,没有明确熔点,只有一个软化温度范围,通常是透明的。 | PS、ABS、PC、PMMA、PVC | |
| 光学性能 | 透明塑料 | 透光率在88%以上。 | PMMA、PC、PS、PET |
| 半透明塑料 | 介于透明和不透明之间。 | PP、PE、PVC、AS | |
| 不透明塑料 | 不透光。 | POM、PA、ABS、HIPS |
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