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High-density polyethylene ethene catalysts

The formation of linear isotactic or syndiotactic polymers can be achieved by metal catalysed polymerisation. This employs Ziegler-Natta catalysts, made from triethylaluminium (Et3Al) and titanium tetrachloride (TiCLr), which react with alkenes by a complex mechanism. Polymerisation of ethylene (ethene, CH2=CH2) leads to the formation of (linear) high-density polyethylene, which is of greater strength than the (branched) low-density polyethylene produced on radical polymerisation. [Pg.216]

Figure 22.14 Low density polyethylene (LDPE) is made from gaseous ethene under high pressure in the presence of a catalyst. LDPE is used for playground equipment because it is easy to mold into various shapes, it is easy to dye into many colors, and it is durable. [Pg.803]

See other pages where High-density polyethylene ethene catalysts is mentioned: [Pg.2]    [Pg.49]    [Pg.91]    [Pg.59]    [Pg.263]    [Pg.372]    [Pg.165]    [Pg.154]    [Pg.380]    [Pg.16]    [Pg.11]   
See also in sourсe #XX -- [ Pg.5 ]



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