Search results for: M. Pyda

Items from 1 to 20 out of 40 results

article

Geometric verification of the validity of Finite Element Method analysis of Abdominal Aortic Aneurysms based on Magnetic Resonance Imaging

Z. Domagała, H. Stępak, P. Drapikowski, A. Kociemba, more

Biocybernetics and Biomedical Engineering > 2018 > Vol. 38, no. 3 > 544--555

The currently used criterion of maximum transverse diameter for the Abdominal Aortic Aneurysm treatment has some limitations. Attempts to create individualized, therapeutic strategies are being conducted, including biomechanical assessment of rupture risk of an aneurysm based on the Finite Element Analysis of the geometric models. The usual approach is to use the results of the computed tomography...

article

Molecular interpretation of low-temperature heat capacity of aliphatic oligo-urethane

A. Czerniecka-Kubicka, I. Zarzyka, M. Walczak, J. Schliesser, more

The Journal of Chemical Thermodynamics > 2017 > 112 > C > 299-307

The low-temperature heat capacity of semi-crystalline aliphatic oligo-urethane obtained from the reaction between butane-1,4-diol and hexamethylene 1,6-diisocyanate was measured using a Quantum Design PPMS (Physical Property Measurement System) in the temperature range of (2.04–292.38)K. The experimental heat capacity data below the glass transition temperature of 280.2K (7.05°C) were interpreted...

article

Advanced analysis of poly(3-hydroxybutyrate) phases based on vibrational heat capacity

A. Czerniecka-Kubicka, I. Zarzyka, M. Pyda

Journal of Thermal Analysis and Calorimetry > 2017 > 127 > 1 > 905-914

The new quantitative thermal analysis of semicrystalline poly(3-hydroxybutyrate) (P3HB) phases based on vibrational, solid and liquid heat capacities has been presented. The apparent heat capacity of P3HB was measured using the standard differential scanning calorimetry, and temperature-modulated DSC and quantitative analysis allow for the study of any glass transition, melting/crystallization process...

chapter

Quantitative thermal analysis of carbohydrate-water systems

M. Pyda

Hot Topics in Thermal Analysis and Calorimetry > The Nature of Biological Systems as Revealed by Thermal Methods > Part IV > 307-332

Conclusions The quantitative thermal analysis and interpretation on a molecular level have shown that starch has a surprising multistage glass transition which stretches over 100 degrees. Even dry starch has such a very broad partial transition which starts at about 250K, far below the decomposition temperature where the glass transition is not yet completed. Adding water, as in food applications,...

article

Vibrational heat capacity of Poly(N-isopropylacrylamide)

A. Czerniecka-Kubicka, I. Zarzyka, J. Schliesser, B.F. Woodfield, more

Polymer > 2015 > 63 > Complete > 108-115

The heat capacity of poly(N-isopropylacrylamide) (PNIPA) has been measured from (1.8–460) K using a quantum design PPMS (Physical Property Measurement System) and differential scanning calorimeters. The low-temperature experimental heat capacity below the glass transition temperature 415 K (141.85 °C) was linked to the vibrational molecular motions of PNIPA to establish the baseline of the solid,...

article

Właściwości termiczne kompozytów otrzymanych z udziałem glinki organicznej poli(kwasu 3-hydroksymasłowego)

A. Czerniecka, I. Zarzyka, B. Pilch-Pitera, M. Pyda

Przetwórstwo Tworzyw > 2015 > T. 21, Nr 1 (163) > 10--14

W niniejszej pracy otrzymano nanokompozyty z poli(kwasu 3-hydroksy-masłowego) i glinki organicznej typu Cloisite® 30B przy użyciu wytłaczarki dwuślimakowej. Nowy materiał otrzymano poprzez mieszanie bezpośrednie. Metodą dyfrakcji rentgenowskiej potwierdzono nanostrukturę uzyskanego kompozytu, a za pomocą metod analizy termicznej badano wpływ zawartości nanonapełniacza na termiczne właściwości otrzymanych...

article

Kompleksowa analiza termiczna poli(n-izopropyloakryloamidu)

A. Czerniecka-Kubicka, I. Zarzyka, M. Pyda

Przetwórstwo Tworzyw > 2015 > T. 21, Nr 3 (165) > 220--223

W niniejszej pracy otrzymano równowagowe linie bazowe stanu stałego i ciekłego poli(N-izopropyloakryloamidu) (PNIPA) wykorzystując metody analizy termicznej. Linia odniesienia stanu stałego PNIPA została obliczona na podstawie założenia, że w temperaturze poniżej temperatury przejścia szklistego, eksperymentalne ciepło właściwe polimerów wynika tylko z oscylacyjnych ruchów molekularnych. Ponadto obliczono...

article

Zaawansowana analiza termiczna poli(3-hydroksymaślanu)

A. Czerniecka-Kubicka, I. Zarzyka, M. Pyda

Przemysł Chemiczny > 2015 > T. 94, nr 11 > 1919-1923

Przedstawiono zaawansowaną analizę termiczną poli(3-hydroksymaślanu) (PHB) przeprowadzoną na podstawie molekularnej interpretacji zmian ciepła właściwego oraz ilościowy opis przejść fazowych zachodzących w PHB podczas zmian temperatury lub czasu. Taka analiza pozwoliła na rozdzielenie pozornego ciepła właściwego, otrzymywanego za pomocą pomiarów różnicowej kalorymetrii skaningowej, na termodynamiczne...

article

Heat capacity and transition behavior of sucrose by standard, fast scanning and temperature-modulated calorimetry

A. Magoń, A. Wurm, C. Schick, Ph. Pangloli, more

Thermochimica Acta > 2014 > 589 > C > 183-196

The heat capacity (C_p) of crystalline and amorphous sucrose was determined using standard and quasi-isothermal temperature modulated differential scanning calorimetry. The results were combined with the published data determined by adiabatic calorimetry, and the C_p values are now reported for the wide 5–600K range. The experimental C_p of solid sucrose at 5–300K was used to calculate the vibrational,...

article

Heat capacity of poly(3-hydroxybutyrate)

A. Czerniecka, A. Magoń, J. Schliesser, B.F. Woodfield, more

The Journal of Chemical Thermodynamics > 2014 > 73 > Complete > 76-84

The heat capacity of poly(3-hydroxybutyrate) (P3HB) has been measured using a quantum design Physical Property Measurement System (PPMS), differential scanning calorimetry (DSC), and temperature-modulated differential scanning calorimetry (TMDSC) over the temperature range of (1.9 to 460)K. The results within the range of (1.9 to 250)K were obtained using the quantum design PPMS, and established the...

article

The kinetics of the glass transition and physical aging in germanium selenide glasses

H.Y. Zhao, Y.P. Koh, M. Pyda, S. Sen, more

Journal of Non-Crystalline Solids > 2013 > 368 > Complete > 63-70

The kinetics associated with the glass transition is investigated using differential scanning calorimetry (DSC) for germanium selenide glasses with Ge content ranging from 0 to 30at.% and average coordination numbers ranging from 2.0 to 2.6. As Ge content increases, the glass transition region broadens and the step change in heat capacity at T _g decreases. As a result of physical aging, enthalpy...

article

Apparent heat capacity measurements and thermodynamic functions of d(−)-fructose by standard and temperature-modulated calorimetry

A. Magoń, M. Pyda

The Journal of Chemical Thermodynamics > 2013 > 56 > Complete > 67-82

The qualitative and quantitative thermal analyses of crystalline and amorphous d(−)-fructose were studied utilising methods of standard differential scanning calorimetry (DSC), quasi-isothermal temperature-modulated differential scanning calorimetry (quasi-isothermal TMDSC), and thermogravimetric analysis (TGA). Advanced thermal analysis of fructose was performed based on heat capacity. The apparent...

article

Melting, glass transition, and apparent heat capacity of α-d-glucose by thermal analysis

A. Magoń, M. Pyda

Carbohydrate Research > 2011 > 346 > 16 > 2558-2566

The thermal behaviors of α-d-glucose in the melting and glass transition regions were examined utilizing the calorimetric methods of standard differential scanning calorimetry (DSC), standard temperature-modulated differential scanning calorimetry (TMDSC), quasi-isothermal temperature-modulated differential scanning calorimetry (quasi-TMDSC), and thermogravimetric analysis (TGA). The quantitative...

article

Study of crystalline and amorphous phases of biodegradable poly(lactic acid) by advanced thermal analysis

A. Magoń, M. Pyda

Polymer > 2009 > 50 > 16 > 3967-3973

The qualitative and quantitative thermal analysis of biodegradable poly(lactic acid) PLA is presented. The glass transition, melting process, and heat capacity of a semi-crystalline poly(lactic acid) are studied utilizing the differential scanning calorimetry and temperature-modulated DSC. The mobile amorphous fraction, W _a degree of crystallinity, W _c and rigid-amorphous fraction,...

article

Heat Capacity of Silk Fibroin Based on the Vibrational Motion of Poly(amino acid)s in the Presence and Absence of Water

M. Pyda, Xiao Hu, Peggy Cebe

Macromolecules > 2008 > 41 > 13 > 4786 - 4793

article

DSC approach for the investigation of mobile water fractions in aqueous solutions of NaCl and Tris buffer

P. Kamasa, M. Bokor, M. Pyda, K. Tompa

Thermochimica Acta > 2007 > 464 > 1-2 > 29-34

The fraction of mobile (unfrozen) water during phase transitions of NaCl–H ₂ O solution and tris(hydroxymethyl)aminomethane (Tris) buffer solution has been determined by differential scanning calorimetry (DSC). Measurements were carried out in the temperature range between −50 and +30°C with a heating rate of 2Kmin ⁻¹ . The fraction of mobile water was estimated from the enthalpy of...

article

Experimental aspects of temperature-modulated dilatometry of polymers

P. Kamasa, P. Myśliński, M. Pyda

Thermochimica Acta > 2006 > 442 > 1-2 > 48-51

Polymers are materials marked by specific physical properties, different from those such as metals, alloys or ceramics. Temperature-modulated temperature profile in the investigation of polymers by dilatometry may have many outstanding features, similar to those of temperature modulated DSC. However the experimental conditions are more stringent than those of conventional dilatometry. An overview...

article

The heat capacity of polyethylene fibers measured by multi-frequency temperature-modulated calorimetry

M. Pyda, E. Nowak-Pyda, B. Wunderlich

Thermochimica Acta > 2006 > 442 > 1-2 > 35-41

The apparent heat capacity of polyethylene fibers in the melting region was measured by quasi-isothermal, temperature-modulated differential scanning calorimetry (TMDSC) and compared with results from standard differential scanning calorimetry (DSC) and the solid and liquid thermodynamic heat capacity as references from the ATHAS Data Bank. Using a multi-frequency, complex sawtooth modulation in the...

article

Characterization of poly(lactic acid) by size exclusion chromatography, differential refractometry, light scattering and thermal analysis

T Malmgren, J Mays, M Pyda

Journal of Thermal Analysis and Calorimetry > 2006 > 83 > 1 > 35-40

A number of experimental techniques are employed to characterize physical and thermal properties of poly(lactic acid), PLA. To characterize PLA in terms of molecular mass and molecular mass distribution, size exclusion chromatography was used. The value of the specific refractive index increment was measured by differential refractometry. The thermal properties of semicrystalline PLA were measured...

article

Reversing and Nonreversing Heat Capacity of Poly(lactic acid) in the Glass Transition Region by TMDSC

M. Pyda, B. Wunderlich

Macromolecules > 2005 > 38 > 25 > 10472 - 10479

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Search results for: M. Pyda

Geometric verification of the validity of Finite Element Method analysis of Abdominal Aortic Aneurysms based on Magnetic Resonance Imaging

Molecular interpretation of low-temperature heat capacity of aliphatic oligo-urethane

Advanced analysis of poly(3-hydroxybutyrate) phases based on vibrational heat capacity

Quantitative thermal analysis of carbohydrate-water systems

Vibrational heat capacity of Poly(N-isopropylacrylamide)

Właściwości termiczne kompozytów otrzymanych z udziałem glinki organicznej poli(kwasu 3-hydroksymasłowego)

Kompleksowa analiza termiczna poli(n-izopropyloakryloamidu)

Zaawansowana analiza termiczna poli(3-hydroksymaślanu)

Heat capacity and transition behavior of sucrose by standard, fast scanning and temperature-modulated calorimetry

Heat capacity of poly(3-hydroxybutyrate)

The kinetics of the glass transition and physical aging in germanium selenide glasses

Apparent heat capacity measurements and thermodynamic functions of d(−)-fructose by standard and temperature-modulated calorimetry

Melting, glass transition, and apparent heat capacity of α-d-glucose by thermal analysis

Study of crystalline and amorphous phases of biodegradable poly(lactic acid) by advanced thermal analysis

Heat Capacity of Silk Fibroin Based on the Vibrational Motion of Poly(amino acid)s in the Presence and Absence of Water

DSC approach for the investigation of mobile water fractions in aqueous solutions of NaCl and Tris buffer

Experimental aspects of temperature-modulated dilatometry of polymers

The heat capacity of polyethylene fibers measured by multi-frequency temperature-modulated calorimetry

Characterization of poly(lactic acid) by size exclusion chromatography, differential refractometry, light scattering and thermal analysis

Reversing and Nonreversing Heat Capacity of Poly(lactic acid) in the Glass Transition Region by TMDSC

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