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Sylwia Dworakowska   Mrs.  Graduate Student or Post Graduate 
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Sylwia Dworakowska published an article in August 2012.
Top co-authors
Dariusz Bogdal

16 shared publications

Cracow University of Technology, Faculty of Chemical Engineering and Technology, Institute of Biotechnology and Chemical Physics, ul Warszawska 24, 31-155 Krakow, Poland

Aleksander Prociak

14 shared publications

Cracow University of Technology, Department of Chemistry and Technology of Polymers, Warszawska 24, 31-155 Cracow, Poland

Publication Record
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Article 3 Reads 9 Citations Microwave-Assisted Synthesis of Polyols from Rapeseed Oil and Properties of Flexible Polyurethane Foams Sylwia Dworakowska, Dariusz Bogdal, Aleksander Prociak Published: 10 August 2012
Polymers, doi: 10.3390/polym4031462
DOI See at publisher website ABS Show/hide abstract
The application of raw materials derived from renewable feedstock has given rise to growing interest recently, as it can be exploited for the production of bio-based materials from vegetable oils. Their availability, biodegradability and low prices have been taken into account. In this work, vegetable oil-based polyols as a prospective replacement for petroleum polyols were investigated. A two-stage method for polyol preparation by incomplete epoxidation of natural oils and subsequent complete oxirane ring opening under microwave irradiation is presented. The course of epoxidation and oxirane ring-opening process was determined analytically by an evaluation of iodine, epoxy and hydroxyl values. The samples of oils and their derivatives were also analyzed by FT-IR and characterized by size exclusion chromatography (SEC) in order to calculate their functionalities. Finally, polyols with two different hydroxyl values were obtained and used for the synthesis of flexible polyurethane (PUR) foams. The scope of this research includes the determination of the relationship between the rapeseed oil-based polyol content and the properties of the resulting materials. It was found that applying bio-based polyols in conjunction with petroleum-based polyols for PUR foams formulations resulted in materials with good mechanical properties and a higher number of cells with smaller dimensions.