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Addition polymerisation is the assembly of simple monomer units to form a larger molecule called a polymer.
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Addition polymerisation is the assembly of simple monomer units to form a larger molecule called a polymer. These monomers join together in a long chain under the correct conditions of temperature and pressure to become a single polymer chain. The monomers in the chain may also contain cross-links, which alter the properties of the polymer molecules. Different temperature and pressure conditions can cause monomers to join together differently, resulting in different polymers even when the same monomers are used. [1] Low density poly(ethene) (ldpe) is an extensively branched polymer, made of ethene monomers, its low density a result of the branching. The formative polymerisation reaction is carried out under high pressure and temperature with radicals, these conditions being responsible for the branching of the chains. The growth of the ldpe polymer chains is due to a radical mechanism and consists of 3 stages. At the initiation stage, the radical...
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