weight-average molecular weight


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weight-average molecular weight:

see molecular weightmolecular 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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Figures 9 and 10 show the corresponding profiles for number-and weight-average molecular weights, respectively.
Figure 23 shows profiles for number- and weight-average molecular weights at [TEMPO]/[BPO] = 0.
Ic], with the weight-average molecular weight being the most important parameter for the fracture behavior.
Figure 10 shows the zero-shear viscosity data of all CRPP samples at three test temperatures as a function of weight-average molecular weight.
To illustrate this effect, elongation at break for all process settings over the weight-average molecular weight [M.
3, it can be seen that the weight-average molecular weight of the polymers increases quickly to a constant in the start-up process of the polymerization, and the plant data are lower than the simulated data.
On the basis of the temperature and the weight-average molecular weight in the ith iterative step, the zero shear viscosity in the (i + 1)th iterative step is calculated via Eqs.
A power-law constitutive equation is used to model the polymer viscosity, with temperature and weight-average molecular weight dependent parameters, and a viscosity plateau at low strain rates:
Table 1 includes the number-and weight-average molecular weights of the four polymers.