Wyniki wyszukiwania dla: PRR/PUR

• Effect of bio-polyol molecular weight on the structure and properties of polyurethane-polyisocyanurate (PUR-PIR) foams

  Publikacja

  • A. Olszewski
  • P. Kosmela
  • L. Vēvere
  • M. Kirpluks
  • U. Cabulis
  • Ł. Piszczyk

  - Scientific Reports - Rok 2024

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• Effect of bio-polyol molecular weight on the structure and properties of polyurethane-polyisocyanurate (PUR-PIR) foams

  Publikacja

  • A. Olszewski
  • P. Kosmela
  • L. Vevere
  • M. Kirpluks
  • U. Cabulis
  • Ł. Piszczyk

  - Scientific Reports - Rok 2024

  The increasing interest in polyurethane materials has raised the question of the environmental impact of these materials. For this reason, the scientists aim to find an extremely difficult balance between new material technologies and sustainable development. This work attempts to validate the possibility of replacing petrochemical polyols with previously synthesized bio-polyols and their impact on the structure and properties...

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• The Influence of Substitution of a Phosphorus-Containing Polyol with the Bio-polyol on the Properties of Bio-based PUR/PIR Foams

  Publikacja

  • K. Gosz
  • J. Haponiuk
  • Ł. Piszczyk

  - JOURNAL OF POLYMERS AND THE ENVIRONMENT - Rok 2018

  In this work, effects of incorporating of a phosphorus-containing polyol into rigid polyurethane/polyisocyanurate foams’ formulations developed with use of two different bio-based polyols, derived from crude glycerol or liquefied cellulose were examined. The bio-polyol derived from crude glycerol was synthesized via two-step process from crude glycerol and castor oil, whereas the bio-polyol derived from liquefied cellulose was...

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• Study on the Structure-Property Dependences of Rigid PUR-PIR Foams Obtained from Marine Biomass-Based Biopolyol

  Publikacja

  • P. Kosmela
  • A. Hejna
  • J. Suchorzewski
  • Ł. Piszczyk
  • J. Haponiuk

  - Materials - Rok 2020

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• Study on the Structure-Property Dependences of Rigid PUR-PIR Foams Obtained from Marine Biomass-Based Biopolyol

  Publikacja

  • P. Kosmela
  • A. Hejna
  • J. Suchorzewski
  • Ł. Piszczyk
  • J. Haponiuk

  - Materials - Rok 2020

  The paper describes the preparation and characterization of rigid polyurethane-polyisocyanurate (PUR-PIR) foams obtained with biopolyol synthesized in the process of liquefaction of biomass from the Baltic Sea. The obtained foams differed in the content of biopolyol in polyol mixture (0–30 wt%) and the isocyanate index (IISO = 200, 250, and 300). The prepared foams were characterized in terms of processing parameters (processing...

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• Physico‐Mechanical Properties and Flammability of PUR/PIR Foams Containing Expandable Graphite Core‐Shell Composite Particles

  Publikacja

  • K. Gosz
  • J. Haponiuk
  • A. D. Mielewczyk-Gryń
  • Ł. Piszczyk

  - POLYMER COMPOSITES - Rok 2019

  In this work, polyurethane/polyisocyanurate (PUR/PIR) foams were modified by two types of expandable graphite (EG) core-shell composite particles. The pulverized EG core-shell composite particles were prepared during emulsion polymerization using methyl methacrylate or glycidyl methacrylate for the synthesis of the polymeric shells (poly(methyl methacrylate) (PMMA) and poly (glycidyl methacrylate) (PGMA)), and then the obtained EG_PMMA...

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• Enhancement of PUR/PIR foam thermal stability after addition of Zostera marina biomass component investigated via thermal analysis and isoconversional kinetics

  Publikacja

  • A. Olejnik
  • P. Kosmela
  • Ł. Piszczyk

  - JOURNAL OF POLYMER SCIENCE - Rok 2021

  In the present work, a thorough thermogravimetric (TG) analysis of bio-based polyurethane–polyisocyanurate (PUR–PIR) foams in both nitrogen and oxygen atmosphere is performed. A sustainable element of the foam is a biopolyol obtained via acid-catalyzed liquefaction of Zostera marina and Enteromorpha Algae biomass. Based on isoconversional analysis and apparent activation energies, several conclusions are obtained. In contradiction...

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• Bio based PUR-PIR foams thermal degradation (TG) and isoconversional kinetics

  Dane Badawcze

  open access

  • A. Olejnik
  • Ł. Piszczyk
  • P. Kosmela

  In the present work, we perform a thorough thermogravimetric (TG) analysis of the bio-based polyurethane – polyisocyanurate (PUR-PIR) foams in both nitrogen and oxygen atmosphere. A sustainable element of the foam was a biopolyol obtained via acid-catalyzed liquefaction of Zostera Marina and Enteromorpha Algae biomass. Based on isoconversional analysis...

• Influence of bio-polyols with different molecular weight on properites of PUR-PIR foams

  Dane Badawcze

  open access

  • A. Olszewski
  • P. Kosmela
  • Ł. Piszczyk

  This work attempts to validate the possibility of replacing petrochemical polyols with previously synthesized bio-polyols and their impact on the structure and properties of rigid polyurethane-polyisocyanurate (PUR-PIR). The influence of bio-polyols addition on foam properties was investigated by mechanical testing, Fourier transform infrared spectroscopy...

• PCR-ELISA: inexpensive alternative to quantitative PCR

  Publikacja

  • D. Drapała
  • M. Kordalewska
  • B. Ferra

  - Rok 2012

  PCR-ELISA (polymerase chain reaction-enzyme linked immunosorbent assay), a combination of PCR and ELISA methods, has been used since late 1980s. The technique is based on specially labelled DNA fragments which are captured by specific DNA sequences and detected by antibodies. The whole procedure of PCR-ELISA is divided into three steps: DNA extraction, PCR reaction and detection by ELISA. The method has been found as very specific...