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Pasich M.,Silesian University of Technology | Pasich M.,Institute for Engineering of Polymer Materials and Dyes in Torun | Henzel N.,Silesian University of Technology | Matlengiewicz M.,Silesian University of Technology
International Journal of Polymer Analysis and Characterization | Year: 2013

The carbonyl signal in the 100 MHz 13C NMR spectra of poly(methyl acrylate) (PMA) recorded in benzene-d6 exhibits configurational sensitivity up to pentads, and the signal of backbone β-CH2 carbons shows splitting up to configurational hexads with traces of octads. Assignment of the sequences to respective signals was confirmed by computer simulation of both carbonyl and methylene signals applying a method of incremental calculation of chemical shifts of individual sequences and second-order Markov statistics for sequence probabilities. © 2013 Copyright Taylor and Francis Group, LLC. Source

Cichy B.,Fertilizers Research Institute | Kwiecien J.,Fertilizers Research Institute | Piatkowska M.,Fertilizers Research Institute | Kuzdzal E.,Fertilizers Research Institute | And 2 more authors.
Polish Journal of Chemical Technology | Year: 2010

The paper presents the results of the tests on the preparation of iron (III) stearate - the most prominent oxo-biodegradation agent for polyolefinic plastics. The process chosen for testing was the double precipitation process, using stearic acid alkalised with soda lye and iron (III) chloride or iron (III) sulphate. A number of iron (III) stearate preparation methods described in the literature were tested and an analytical procedure for monitoring the process was developed using both the classical and instrumental techniques. FTIR spectroscopy is the most useful technique for the product quality control and identification. During the study the characteristics of the proper product were also determined using the DSC methods. Microscopy and laser diffraction particle size analysis were applied to determine the size of the precipitated product grains. An application sample of the product obtained by the double decomposition method from iron (III) sulphate as the iron carrier has successfully passed the application tests in the polyethylene packaging film. Source

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