A5086857804- Polymer crystallization and properties
- Muon and positron interactions and applications
- biodegradable polymer synthesis and properties
- Collagen: Extraction and Characterization
- Recycling and Waste Management Techniques
- Polymer Nanocomposites and Properties
- Silk-based biomaterials and applications
- Polymer Foaming and Composites
- Bone Tissue Engineering Materials
- Microplastics and Plastic Pollution
- Membrane Separation and Gas Transport
- Advanced Sensor and Energy Harvesting Materials
- Polymer Science and PVC
- Rheology and Fluid Dynamics Studies
- Nanocomposite Films for Food Packaging
- Meat and Animal Product Quality
- Additive Manufacturing and 3D Printing Technologies
- Protein Hydrolysis and Bioactive Peptides
- Bone and Dental Protein Studies
- Polysaccharides and Plant Cell Walls
- Aerogels and thermal insulation
- Nerve injury and regeneration
- Dyeing and Modifying Textile Fibers
- Graphene research and applications
- Proteins in Food Systems
Polish Academy of Sciences
2017-2024
Centrum Badań Molekularnych i Makromolekularnych Polskiej Akademii Nauk
2017-2024
Lodz University of Technology
2012-2019
The work explains the mechanism of improvement oxygen barrier performance cold-crystalized polylactide (PLA) modified with low molecular weight compounds (triethyl citrate, TEC; glycerol, Gly; and polyethylene glycol, PEG). It was found that incorporation small amounts modifier (0.5–1.5 wt %) into PLA matrix greatly reduces transport properties. On other hand, a further increase in content blends led to deterioration these Based on thermal analysis, it shown present did not affect degree...
In this paper, for the first time, positron annihilation lifetime spectroscopy, after an appropriate adaptation, was used to analyze plastic deformation process of high-density polyethylene as a representative semicrystalline polymer. It shown that average size free volume pores amorphous phase in studied strain range decreased comparison with undeformed polyethylene, even initiation cavitation phenomenon due highly anisotropic, ellipsoidal shape cavities aspect ratio amounting ∼45. The mean...
Plastic deformation of low/high density polyethylene (LDPE/HDPE) was analyzed in this work using positron annihilation lifetime spectroscopy (PALS). It shown that undeformed LDPE, both the mean ortho-positronium (τ3) and its dispersion (σ3), corresponding to average size distribution free-volume pores amorphous component, respectively, were clearly higher than HDPE. This effect induced by a lower less uniform molecular packing regions LDPE. During an increase τ3 value observed within local...
In this paper the influence of different aspects crystallization process on formation ring-banded spherulites and transition between banded non-banded structures in polylactide was analyzed. Based measurements using differential scanning calorimetry (DSC) polarized optical microscopy (POM), it found that banding phenomenon its blends with triethyl citrate (TEC) exclusively depends degree supercooling (ΔT). work, for first time, equilibrium melting point (Tm0) correlated isothermal...
In this work, positron annihilation lifetime spectroscopy (PALS) was used for the first time to study plastic deformation of polypropylene. An appropriate methodological approach proposed in order analyze mechanical response polypropylene a way similar situ conditions. It demonstrated that intermediate expressed by τ2 (mean lifetime) and σ2 (dispersion) values gives us information about crystalline component while longest τ3 ortho-positronium σ3 "porosity" amorphous phase. Then, influence...
Polylactide/triethyl citrate (PLA/TEC) systems were prepared in two ways by introducing TEC to solidified polymer matrix (SS) and blending a molten state (MS) investigate the effectiveness of plasticization process after solidification polylactide. The processes, independent way into PLA matrix, leads characterized similar stability, morphology, properties. Some differences mechanical properties between MS SS result primarily from difference degree crystallinity/crystal thickness itself....
High-density polyethylene/paraffin wax (HDPE/wax) systems with adjustable density of the amorphous regions were prepared by a melt-blending process to optimize/control final oxygen barrier properties. The introduction paraffin (a low molecular weight modifier) is key tune gas permeability properties polyethylene-based materials. Density gradient column (DGC) measurements distinctly showed that incorporation modifier led densification phase semicrystalline HDPE consisting in decrease average...
This contribution discusses the preparation of partially disentangled polylactide from solution. The rheological method determined how density macromolecular entanglement depends on concentration prepared From a 0.1 wt % solution, polymer having 20% original entanglements was obtained. crystallization studies in isothermal conditions showed that growth crystals can be 10% faster if is disentangled. For first time, it shown there are shifts temperatures regimes.
The influence of the heating/cooling conditions SBM process and recycled PET (RPET) content on microscopic properties (in bottle) relative to preform was analyzed. tests bottle material show that microcavity effects occur during deformation these are associated with rotation crystallites in a non-crystalline matrix temperature-dependent stiffness. increase free volume as an indicator microcavitation confirmed by measuring positron annihilation lifetime material. Research indirectly proves...
In this article, fully biodegradable films based on high methylated (HM) apple pectin, glycerol, and margarine were made. The influence of different crosslinking agents the structure functional properties obtained was investigated. Fourier-transform infrared spectroscopy (FTIR), thermogravimetry (TG), differential scanning calorimetry (DSC), small-angle X-ray scattering (SAXS) polarized light microscopy (POM) analyses showed key importance agent chemical interactions between individual...
This work focused on determining the factors that are of key importance in oxygen barrier properties low-density polyethylene (LDPE). It has been shown that, depending type and amount low-molecular-weight compound (tetracosane, paraffin wax, oil) introduced into LDPE matrix, it can contribute to improvement or deterioration properties. Tetracosane wax incorporated matrix caused a reduction permeability parameters compared neat polyethylene. As their content increased, samples towards also...
This research explores how varying proportions of virgin polyethylene terephthalate (vPET) and recycled (rPET) in vPET-rPET blends, combined with preform thermal conditions during the stretch blow molding (SBM) process, influence PET bottles’ microscopic characteristics. Key metrics such as viscosity, density, crystallinity, amorphous phase relaxation, microcavitation were assessed using response surface methodology (RSM). Statistical analysis, including Analysis variance (ANOVA) its power,...
Abstract The paper describes the possibility of using Sirius red dye for determination collagen conjugated with keratin wool. assay was shown to be feasible detection, which enzymatically coupled onto wool fibers and woven fabric. effectiveness combination protein evaluated .
Collagenous scaffolds provide good conditions for embryonic nerve cell growth. The aim of the current study was to assess brains reaction implantation 3D sponge‑shaped scaffolds. These consisted collagen (Col) and Col with chondroitin sulphate, which is modified by carbodiimide, or crosslinked dialdehyde cellulose. also evaluated expression integrins α2 β1 in cells. Embryonic cells were isolated from rat embryos. Acellular scaffolds, populated cells, implanted into rats brain. fibers all...