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chain
in polymers
The whole or part of a macromolecule, an oligomer molecule or a block, comprising a linear or branched sequence of constitutional units between two boundary constitutional units, each of which may be either an end-group, a branch point or an otherwise-designated characteristic feature of the macromolecule.
Notes:
  1. Except in linear single-strand macromolecules, the definition of a chain may be somewhat arbitrary.
  2. A cyclic macromolecule has no end groups but may nevertheless be regarded as a chain.
  3. Any number of branch points may be present between the boundary units.
  4. Where appropriate, definitions relating to 'macromolecule' may also be applied to 'chain'.
Source:
PAC, 1996, 68, 2287 (Glossary of basic terms in polymer science (IUPAC Recommendations 1996)) on page 2293
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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: 2008-10-07; version: 2.0.2.
DOI of this term: doi:10.1351/goldbook.C00946.
Original PDF version (may be out of date): http://www.iupac.org/goldbook/C00946.pdf.
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