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branching fractionbranching plane

branching index

in polymers
A parameter, g, characterizing the effect of long-chain branches on the size of a branched macromolecule in solution and defined as the ratio of the mean-square radius of gyration of a branched molecule, s b 2, to that of an otherwise identical linear molecule, s l 2, with the same relative molecular mass in the same solvent and at the same temperature, i.e. g = s b 2 s l 2.
Source:
Purple Book, p. 51
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Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook.
Last update: 2009-09-07; version: 2.1.5.
DOI of this term: doi:10.1351/goldbook.B00726.
Original PDF version: http://www.iupac.org/goldbook/B00726.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.
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