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The development of poly(ethene) and Poly(propene).
Member rating: No Rating | Words: | Submitted: Wed Aug 20 2003
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The development of poly(ethene) and Poly(propene). A polymer molecule is a long molecule made up from lots of small molecules called monomers. The properties of the polymer depend on the type of monomers and how they are connected together. Poly(ethene) and PVC are example of polymers, which contain the same monomers. The reaction starts with the initiation stage. This involves the creation of a radical from the catalyst. In this case, it is donated from the oxygen; it is created by breaking the oxygen-oxygen bond. The catalyst in the polymerisation of ethene is benzoyl peroxide, which is organic peroxide. As an oxygen bond has been broken it leaves electrons free. R = a group of particles * = A free radical R* + H2C === CH2 ==> R - CH2 - CH2* There are certain conditions that need to be met for the reaction to be carried out efficiently. These are: Temperature About...
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