The dependence of the chain branching degree on molecular weight: Fractal analysis

The fractal analysis methodology allows the clear structural identification of both chemical and physical factors controlling a chain branching degree. The effective number of branching centers per one macromolecule m is controlled by four factors: polymer molecular weight, MW, maximal 'chemica...

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Bibliographic Details
Published in:Chemical Industry and Chemical Engineering Quarterly 2008, Vol.14 (3), p.181-184
Main Authors: Kozlov, G.V., Burya, Aleksandar, Shustov, G.B.
Format: Article
Language:English
Subjects:
branching
non-screening surface critical dimension
polyhydroxyether
structure
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Summary:The fractal analysis methodology allows the clear structural identification of both chemical and physical factors controlling a chain branching degree. The effective number of branching centers per one macromolecule m is controlled by four factors: polymer molecular weight, MW, maximal 'chemical' density of reactive centers, cch, dimension of non-screening surface of macromolecular coil, du, and its fractal dimension, D. The presented research allows the determination of the critical value, Dcr = 1.10, the lower of which branching degree is equal to zero (i.e., branching does not occur). nema
ISSN:1451-9372
2217-7434
DOI:10.2298/CICEQ0803181K