Classification of Plastic Materials

塑料材料的分類是什麼？

• 線性和分支塑料

• 熱塑性塑料和熱固性塑料

• 通用型和特殊工程塑料

• 結晶和非結晶塑料

• 塑料回收的分類

塑料是如何根據分子鏈結構進行分類的？

• 線性聚合物

• 分支聚合物

What happens to linear or branched polymers when heated?

• They become rigid

• They can flow due to molecular vibration

What is the characteristic of cross-linked or network polymers?

• They can flow when heated

• They cannot flow when heated

What are the classifications of plastics based on temperature effects?

• Thermoplastic plastics

• Thermosetting plastics

What is the property of thermosetting plastics once they are cured?

• They can melt again

• They do not melt again

What are some common uses of thermoplastic materials?

• Toys, baby carriages, soft and hard mats

• Containers, various boxes, toothbrushes

What are the characteristics of PVC?

• Strength, electrical insulation, chemical resistance

• High flexibility and low temperature stability

What is the property of PE?

• Lightweight, high mechanical strength

• High temperature resistance

What are the characteristics of PU or PUR?

• Elasticity, toughness, good aging resistance

• High temperature resistance