聚乙烯( polyethylene,簡稱PE)是乙烯經聚合制得的一種熱塑性樹脂。在工業(yè)上,也包括乙烯與少量α-烯烴的共聚物。聚乙烯無臭,無毒手感似蠟,具有優(yōu)良的耐低溫性能(低使用溫度可達-100~-70℃),化學穩(wěn)定性好,能耐大多數酸堿的侵蝕(不耐具有氧化性質的酸)。常溫下不溶于一般溶劑,吸水性小,電絕緣性優(yōu)良。高密度聚乙烯(HDPE)是不透明的白色粉末造粒后為乳白色顆粒,分子為線型結構,很少支化現(xiàn)象是較典型的結晶高聚物。機械性能均優(yōu)于低密度聚乙烯,熔點比低密度聚乙烯高,約126~136℃,其脆化溫度比低密度聚乙烯低約-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

 

 

 

 

 

 

 

紡織,造紙,交通運輸,機械,采礦,農業(yè),建筑,食品,體育,電子,船舶,汽車等。

Textile, paper -making, transportation, machinery, mining, agriculture, construction, food, sports,electronics, ships cars, etc