Controlled Molecular Weight by the Precipitation Polymerization of 2,6-Dimethylphenol

Autor:	M.H.P. van Genderen, E. W. Meijer, H.A.M. van Aert, PJ Piet Lemstra, R.W. Venderbosch
Přispěvatelé:	Macromolecular and Organic Chemistry, Macro-Organic Chemistry
Rok vydání:	1995
Předmět:	chemistry.chemical_classification Molar mass Polymers and Plastics Molecular mass Chemistry General Chemistry Polymer Toluene Oligomer chemistry.chemical_compound Polymer chemistry Materials Chemistry Ceramics and Composites Precipitation polymerization Molar mass distribution Solvent effects
Zdroj:	Journal of Macromolecular Science : Pure and Applied Chemistry, A32(3), 515-523. Taylor and Francis Ltd.
ISSN:	1520-5738 1060-1325
Popis:	Low molar mass poly(2,6-dimethyl-1,4-phenylene-ether)s (PPE) have been prepared by the precipitation polymerization of 2,6-dimethylphenol (DMP) under the action of a Cu(I)Cl/amine-catalyst and O2. The polymers prepared possess a rather narrow molecular weight distribution (D = 1.7−2.2), and the molecular weight can easily be controlled by adjusting the solvent mixture of 2-propanol and toluene. Molecular weights were determined using 1H-NMR spectroscopy, GPC, and FD-MS, and range from M n = 2700 to 7500 g/mol. No Mannich-basetype endgroups and no incorporation of DPQ (3,5,3′,5′-tetramethyl-4,4′-diphenoquinone) has been detected.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76bd007e8d5ff998847e3de861c7c669 https://doi.org/10.1080/10601329508013680 Zobrazit plný text záznamu