Ageing molecular

W = WE I GHT-AVER AGE MOLECULAR WE IGHT N = NUMBER-AVERAGE MOLECULAR WE IGHT... 

Table II. Dispersed Particle Size (S)° in Microns as a Function of Weight Percent PMMA (W) and Number-Aver age Molecular Weight PMMA (Mn) for the PMMA/PS System...

You might want to compare Equation 6-37 to that of the definition of the number aver- age molecular weight. NA n) is the number fraction of sequences of n A s, which we just. considered. Now, we know that (Equations 6-38) ... 

A few of the major problem areas requiring investigation are dealt with briefly below production — particulate oi anic matter and dissolved oi anic matter production distribution — horizontal, vertical and temporal distribution humification age molecular weight distribution and chelation. 

Polydispersity (weight avt age molecular weighl umber avtaage molecular weight), as determined by GPC Melting temperature, as determined by DSC... 

End-Group Analysis n The quantitative determination, by chemical or spectrographic methods, of the number of end groups present in a sample of polymer. With linear, unbranched polymers, the mass of the sample divided by half the measured number of end groups equals the Number-Aver age Molecular Weight. 

The first average in common use is number-aver age molecular weight. This number is obtained by dividing the total mass of the sample by the number of molecules in it. The formula for this average is... 

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