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number-average molecular weight

   Also found in: Dictionary/thesaurus, Medical 0.01 sec.
number-average molecular weight: see molecular weight molecular weight, weight of a molecule of a substance expressed in atomic mass units (amu). The molecular weight may be calculated from the molecular formula of the substance; it is the sum of the atomic weights of the atoms making up the molecule.
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n] Number-average molecular weight t Time, s g' Branching index Greek Symbols [alpha] Mark-Houwink constant [eta] * Complex viscosity [lambda] Relaxation time [omega] Angular frequency, rad/s [[gamma].
The elastomer has cyclic vinyl units according to a mass content of greater than or equal to 15% and a number-average molecular weight of from 30,000 to 350,000 g/mol.
This average is more dependent on the number of heavier molecules than is the number-average molecular weight (Mn), which is dependent simply on the total number of particles.
 
 
 
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