Common examples are the number average molecular weight and weight average molecular weight.
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Where M _ w is the weight average molecular weight and M _ n is the number average molecular weight.
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The decrease of termination reactions also allows radical chains to add monomer for longer time periods, raising the weight average molecular weight dramatically.
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The weight average molecular weights of commercial polymers range from 100, 000 to 200, 000 and the number average molecular weights range from 45, 000 to 64, 000.
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:Are you talking about the weight average molecular weight M w and the number average molecular weight M n ?-- HappyCamper 7 July 2005 04 : 29 ( UTC)
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The size distribution can be characterized statistically by its weight average molecular weight ( Mw ) and its number average molecular weight ( Mn ), the ratio of which is called the polydispersity index ( Mw / Mn ).
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Polymers can be characterized by a variety of definitions for molecular weight including the number average molecular weight ( M n ), the weight average molecular weight ( M w ) ( see molar mass distribution ), the size average molecular weight ( M z ), or the viscosity molecular weight ( M v ).
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