Precipitation polymerization of ε-caprolactone in water using metal triflates as catalysts

The precipitation polymerization of ε-caprolactone has been assessed in water using various commercial metal triflates as catalysts. The reaction is quantitative at 70 and 100 °C, leading to number-average molecular weights up to 5,400 g/mol and dispersities around 1.5–2.0. A polycondensation mechan...

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Veröffentlicht in:	Polymer bulletin (Berlin, Germany) Germany), 2012-10, Vol.69 (7), p.757-763
Hauptverfasser:	Scullion, Rachel, Zinck, Philippe
Format:	Artikel
Sprache:	eng
Schlagworte:	Acids Applied sciences Biodegradable materials Catalysts Characterization and Evaluation of Materials Chemistry Chemistry and Materials Science Chromatography Complex Fluids and Microfluidics Equilibrium Exact sciences and technology Molecular weight Organic Chemistry Original Paper Physical Chemistry Physicochemistry of polymers Polyesters Polymer industry, paints, wood Polymer Sciences Polymerization Polymers Soft and Granular Matter Technology of polymers
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Zusammenfassung:	The precipitation polymerization of ε-caprolactone has been assessed in water using various commercial metal triflates as catalysts. The reaction is quantitative at 70 and 100 °C, leading to number-average molecular weights up to 5,400 g/mol and dispersities around 1.5–2.0. A polycondensation mechanism operating from in situ generated 6-hydroxyhexanoic acid is proposed. Among various salts, aluminum and tin(II) triflates lead to the higher molecular weight after 24 h reaction at 70 °C.
ISSN:	0170-0839 1436-2449
DOI:	10.1007/s00289-012-0762-6