聚乙烯/高密度聚乙烯

聚乙烯( polyethylene,简称PE)是乙烯经聚合制得的一种热塑性树脂。在工业上,也包括乙烯与少量α-烯烃的共聚物。聚乙烯无臭,无毒手感似蜡,具有优良的耐低温性能(最低使用温度可达-100~-70℃),化学稳定性好,能耐大多数酸碱的侵蚀(不耐具有氧化性质的酸)。常温下不溶于一般溶剂,吸水性小,电绝缘性优良。高密度聚乙烯(HDPE)是不透明的白色粉末造粒后为乳白色颗粒,分子为线型结构,很少支化现象是较典型的结晶高聚物。机械性能均优于低密度聚乙烯,熔点比低密度聚乙烯高,约126~136℃,其脆化温度比低密度聚乙烯低约-100~-140℃。

 

Polyethylene(PE) is a kind of thermoplastic resin made by polymerization of ethylene In industry, copoly

mers of ethylene with small amounts of alpha-olefins are also included Polyethylene odorless, non-toxic, feel like wax, with excellent low temperature performance(minimum temperature up to-100 --70C), chemical stability, resistance to most acid-base erosion (intolerance with oxidation Nature of the acid). Insoluble in nor mal solvents at room temperature, water absorption, excellent electrical insulation.
 

Hith-density polyethylene(HDPE) is an opaque white powder granulated milky white particles, the linear

structure of the molecule, very few branching phenomenonore typical of crystalline polymers. Mechanical

properties are better than low -density polyethylene, the melting point higher than low -density polyethylene

about 126-136 C, the embrittlement temperature lower than the low-density polyethylene, about -100--140C

 

 

 

 

 

 

 

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