If two substances had molecular formulae such that one was an integer multiple of the other – e.g., acetylene (C2H2) and benzene (C6H6) – Berzelius called the multiple formula "polymeric". See: Jöns Jakob Berzelius (1833) "Isomerie, Unterscheidung von damit analogen Verhältnissen" (Isomeric, distinction from relations analogous to it), Jahres-Bericht über die Fortschitte der physischen Wissenschaften …, 12: 63–67. From page 64: "Um diese Art von Gleichheit in der Zusammensetzung, bei Ungleichheit in den Eigenschaften, bezeichnen zu können, möchte ich für diese Körper die Benennung polymerische (von πολυς mehrere) vorschlagen." (In order to be able to denote this type of similarity in composition [which is accompanied] by differences in properties, I would like to propose the designation "polymeric" (from πολυς, several) for these substances.) Originally published in 1832 in Swedish as: Jöns Jacob Berzelius (1832) "Isomeri, dess distinktion från dermed analoga förhållanden," Årsberättelse om Framstegen i Fysik och Kemi, pages 65–70; the word "polymeriska" appears on page 66.
Roiter, Y.; Minko, S. (2005). "AFM Single Molecule Experiments at the Solid-Liquid Interface: In Situ Conformation of Adsorbed Flexible Polyelectrolyte Chains". Journal of the American Chemical Society. 127 (45): 15688–15689. doi:10.1021/ja0558239. PMID16277495.
"Periodic copolymer". IUPAC Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). International Union of Pure and Applied Chemistry. 2014. doi:10.1351/goldbook.P04494. Retrieved 9 April 2020.
Iakovlev, V.; Guelcher, S.; Bendavid, R. (28 August 2015). "Degradation of polypropylene in vivo: A microscopic analysis of meshes explanted from patients". Journal of Biomedical Materials Research Part B: Applied Biomaterials. 105 (2): 237–248. doi:10.1002/jbm.b.33502. PMID26315946.
Hurley, Paul E. (May 1981). "History of Natural Rubber". Journal of Macromolecular Science: Part A - Chemistry. 15 (7): 1279–1287. doi:10.1080/00222338108056785. ISSN0022-233X.
"Periodic copolymer". IUPAC Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). International Union of Pure and Applied Chemistry. 2014. doi:10.1351/goldbook.P04494. Retrieved 9 April 2020.
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Roiter, Y.; Minko, S. (2005). "AFM Single Molecule Experiments at the Solid-Liquid Interface: In Situ Conformation of Adsorbed Flexible Polyelectrolyte Chains". Journal of the American Chemical Society. 127 (45): 15688–15689. doi:10.1021/ja0558239. PMID16277495.
Iakovlev, V.; Guelcher, S.; Bendavid, R. (28 August 2015). "Degradation of polypropylene in vivo: A microscopic analysis of meshes explanted from patients". Journal of Biomedical Materials Research Part B: Applied Biomaterials. 105 (2): 237–248. doi:10.1002/jbm.b.33502. PMID26315946.
Hurley, Paul E. (May 1981). "History of Natural Rubber". Journal of Macromolecular Science: Part A - Chemistry. 15 (7): 1279–1287. doi:10.1080/00222338108056785. ISSN0022-233X.