polyadditionn.
/ˌpɒlɪəˈdɪʃn/, U.S. /ˈˌpɑliəˈdɪʃ(ə)n/ Chemistry.
An addition reaction between two compounds which yields a polymeric product.
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polyaddition1948
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polyaddition1948
1948 Chem. Abstr. 42 6160 (heading) The diisocyanate polyaddition process.
1970 E. L. McCaffery Lab. Prep. for Macromolecular Chem. 58 Condensation polymerization..may take place either by a polycondensation reaction, whereby low molecular-weight by-product is formed along with the polymer,..or by a polyaddition reaction in which the total reactants are incorporated in the polymer chain, as is typified by polyurethane formation.
1998 Textile Horizons May 20/4 The polyester resins used as polyols in the manufacture of polyurethanes..are synthesised at room temperature using an enzymatic process which mimics a polyaddition type of reaction.
This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).
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