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Plastics materials

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catchinit | 23:31 Thu 22nd Dec 2005 | Science
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As far as i understand, through free radical polymerisation, different molecular chain lengths and therefore different molecular masses will be produced..... but.....Why are some low molecular mass polymer molecules required in the bulk of a polymer sample?

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This distribution of molecular mass is useful in that the smaller molecules have a lubricating effect which is very useful when it come to processing the polymer.

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