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main-chain scission

Chemical reaction that results in the breaking of main-chain bonds of a polymer molecule.
Some main-chain scissions are classified according to the mechanism of the scission process: hydrolytic, mechano-chemical, thermal, photo-chemical, or oxidative scission. Others are classified according to their location in the backbone relative to a specific structural feature, for example, α-scission (a scission of the C–C bond alpha to the carbon atom of a photo-excited carbonyl group) and β-scission (a scission of the C–C bond beta to the carbon atom bearing a radical), etc.
PAC, 2004, 76, 889 (Definitions of terms relating to reactions of polymers and to functional polymeric materials (IUPAC Recommendations 2003)) on page 892
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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: (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
Last update: 2014-02-24; version: 2.3.3.
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