A5041583840- Polymer composites and self-healing
- biodegradable polymer synthesis and properties
- Flame retardant materials and properties
- Natural Fiber Reinforced Composites
- Silicone and Siloxane Chemistry
- Polymer Nanocomposites and Properties
- Bone Tissue Engineering Materials
- Synthesis and properties of polymers
- Material Properties and Applications
- Tribology and Wear Analysis
- Fire dynamics and safety research
- Engine and Fuel Emissions
- Electrospun Nanofibers in Biomedical Applications
- Carbon dioxide utilization in catalysis
- Polymer Foaming and Composites
- Advancements in Materials Engineering
- Polymer crystallization and properties
- Epoxy Resin Curing Processes
- Orthopaedic implants and arthroplasty
- Waste Management and Environmental Impact
- Textile materials and evaluations
- Lignin and Wood Chemistry
- Adsorption, diffusion, and thermodynamic properties of materials
- Spine and Intervertebral Disc Pathology
- Dyeing and Modifying Textile Fibers
Warsaw University of Technology
2015-2024
Polymer Research Institute
2018
Materials Science & Engineering
2010
Flexible polyurethane foams (FPF) are polymer materials that have high flammability. Fyrol PNX (FPNX) and expandable graphite (EG), been used to modify the properties of these materials. The aim this study was assess possibility improving thermal stability flame retardancy FPF by addition FPNX EG fillers. prepared were characterised their apparent density, hardness, flexibility, irreversible strain linear flammability, as well thermogravimetric analysis (TGA), dynamic mechanical analysis,...
Abstract Carbonated soybean oil (CSO) containing five‐membered cyclic carbonate groups has been obtained in the reaction of epoxidized with carbon dioxide presence KI activated by 18‐crown‐6 under 6 MPa CO 2 pressure at 130°C. The CSO was used for modification bisphenol‐A based epoxy resin. composition epoxide‐cyclic cured using polyamine hardeners one‐step and two‐step procedures. All compositions were characterized their thermal mechanical properties compared parent network. optimal method...
The purpose of this work was to obtain environmentally friendly natural fibre composites (NFC) from high-density polyethylene (PE-HD) foil and either finely ground sunflower husk or pistachio shells, which both possess physico-mechanical characteristics similar wood-polymer composite. were prepared waste materials without the use additives. It found that 66% grains 180 850 μm in size, 88% shell particles less than 63 size. With a rolling mixer, six mixtures produced with filler shares...
The reported study concerns the introduction of renewable raw materials into formulation rigid polyurethane foams in quest for sustainable development polymer composites. In this study, foam composites were prepared using 75 wt.% rapeseed oil-based polyol and 15 parts per hundred (php) natural fillers such as chokeberry pomace, raspberry seeds, well hazelnut walnut shells. influence used on foaming process, structure, properties was investigated a FOAMAT analyzer wide selection...
Using one-step method, rigid polyurethane foams were made, modified with developed fire retardant systems containing halogen-free flame retardants and nanofillers in the form of multi-walled carbon nanotubes or nanoscale titanium dioxide. The materials subjected to a test using cone calorimeter smoke-generating chamber, selected samples further analyzed via thermogravimetry oxygen index. Moreover, products thermal degradation identified gas chromatography mass spectrometer. Conducted...
Composites of polyethylene matrices and fillers consisting finely ground pistachio shells sunflower husks were manufactured. These materials subjected to a series tests for the purpose examining their processing qualities, physical, mechanical thermal characteristics, flammability resistance environmental factors, determining feasibility application paths. The relationship between natural fiber composites' morphology stability was described. Based on obtained test results, influence lignin...
In this study, the influence of chemical structures petrochemical polyols on foaming process polyurethane compositions as well selected properties foams obtained has been investigated. Two types were used—polyester and polyether their blends with a rapeseed oil-based polyol. Dielectric polarization, temperature expansion velocity determined during systems different polyol components. The results show highest reactivity polyester decrease system's result partial replacement bio-based content...
Polyurethane foams are widely used in biomedical applications due to their desirable mechanical properties and biocompatibility. However, the cytotoxicity of its raw materials can limit use certain applications. In this study, a group open-cell polyurethane were investigated for cytotoxic as function isocyanate index, critical parameter synthesis polyurethanes. The synthesized using variety indices characterized chemical structure cytotoxicity. This study indicates that index highly...
Carbon nanotubes (CNTs) were deposited on the surfaces of polyurethane (PUR) foams by electrophoretic deposition (EPD). The parameters EPD optimized in order to obtain homogeneous CNT coatings PUR and adequate infiltration three-dimensional (3D) porous network. microstructure composites was investigated high-resolution scanning electron microscopy (HRSEM), revealing that optimal quality achieved an voltage 20 V. thermal properties CNT-coated specimens, determined thermogravimetric analysis...
Two biopolyols have been synthesized from rapeseed oil and applied to obtain rigid flexible polyurethane foams. Biopolyols were prepared using a two-step method of epoxidation opening the oxirane rings. It was found that, regardless type foams, addition composition reduces its reactivity, which confirmed by changes dielectric polarization, as well reduction maximum temperature in foam core during foaming process. In case polyol, biomodification caused decrease apparent density but involving...
This article presents the results of testing foam blocks made with a high-pressure foaming machine under industrial conditions. Foam were at pressures in range 110-170 bar substrate temperatures allowed by suppliers. The process parameters each block evaluated. structure foams outer and central parts was characterized using FTIR spectroscopic analysis microscopic observations SEM. changes apparent density, strength properties brittleness different mixing varied depending on pressure which...