1. Effect of Zn/Co initial preparation ratio in the activity of Double Metal Cyanide catalysts for propylene oxide and CO2 copolymerization
- Author
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Cristina Andrés-Iglesias, Tapio Salmi, José Román Galdámez, Juan García-Serna, Adrian Fernández, and María Pinilla de Dios
- Subjects
Polymers and Plastics ,010405 organic chemistry ,Cyanide ,Organic Chemistry ,General Physics and Astronomy ,Infrared spectroscopy ,010402 general chemistry ,01 natural sciences ,Ring-opening polymerization ,0104 chemical sciences ,Catalysis ,Gel permeation chromatography ,chemistry.chemical_compound ,chemistry ,Materials Chemistry ,Polypropylene carbonate ,Organic chemistry ,Propylene oxide ,Inductively coupled plasma ,Nuclear chemistry - Abstract
Zn-Co double metal cyanide (DMC) catalysts were prepared by varying the initial amounts of ZnCl2 to analyze the influence of method of preparation on the different copolymerization parameters. Synthesized catalysts were analyzed by different techniques, infrared spectrometry and inductively coupled plasma optical emission spectrometry, scanning electron microscopy, N2-physisorption and X-ray diffraction to determine whether characteristics affect the catalytic activity. The copolymers were characterized by infrared spectrometry and gel permeation chromatography. Highly active catalyst (2.5 kg polymer/g catalyst) was synthesized, low amounts of cyclic carbonate byproduct were produced (0.4 %) with medium crystallinity catalysts and considerable amounts of K+ (0.4% to 1.0%wt)., CTQ2015-64892-R (MINECO/FEDER)
- Published
- 2017
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