In order to establish the differences in packaging containing various essential oils, polylactide (PLA)-based polymeric films incorporating poly(ethylene glycol) (PEG), clove (C), grapefruit (G), rosemary (R), and tea tree (T) oils were obtained subsequently analyzed. addition examining structure morphology, polymer underwent analyses that are particularly important with regard contact food. Mechanical antioxidant properties, water vapor transmission rate (WVTR), analysis of barrier...

A multilayer structure is a type of construction consisting outer layers and core, which mainly characterized by high strength specific stiffness, as well the ability to dampen vibration sound. This combines traditional materials (mainly metals) composites. Currently, sandwich structures in any configurations (types core) are one main directions technology development research. paper evaluates surface quality II- III-layer that combination aluminum alloy CFRP (Carbon Fiber-Reinforced...

This article presents the initial test results examining basic technological factors, such as type of modifying agent and seasoning time, which influence properties adhesive epoxide compositions. The aim study was to prepare compositions with 2% content selected natural fillers (montmorillonite NanoBent ZR-2, ground chalk (powder)—CaCO3, activated carbon powder C) examine their strength properties. A polymeric matrix used an composition consisted resins in industry: Epidian 5 53 cured by...

A series of new films with antibacterial properties has been obtained by means solvent casting method. Biodegradable materials including polylactide (PLA), quercetin (Q) acting as an compound and polyethylene glycol (PEG) a plasticizer have used in the process. The effect well amount PEG on structural, thermal, mechanical determined. It was found that addition significantly influences thermal stability. should be stressed samples containing studied flavonoid are characterized higher Young...

The paper analyses the impact of mechanical milling pre-treatment parameters on adhesive joint strength. Comparison surface roughness adherends after and its effect strength is analysed in tests. tests were performed C45 structural steel specimens, which subjected to machining at different parameters, with two types cutters. Adherends degreased prior joining. Two end mills used NFPaφ20 high-speed cutter R390-020B20-11L indexable cutter. was carried out three cutting speeds: 0.05, 0.15 0.30...

The objective of this study was to determine the effect selected curing conditions on mechanical properties cured adhesive compounds and joints made with these adhesives. Four different two-component epoxy were investigated in study. All them based Epidian 53 resin prepared using four types agents: polyamide, two amines Mannich base. aforementioned adhesives used fabricate single-lap C45 steel produce samples compounds. methods employed study: (i) room conditions; (ii) for 7 days then a...

The objective of this study is to compare the effect selected operating factors on mechanical properties epoxy adhesive compounds aged in salt water. Five different water environments were tested: tap water, normal seawater (reference salinity value), with double reference value, half and a quarter value. Samples two prepared using resin triethylenetetramine curing agent. One was filled calcium carbonate. samples five for three months, one month week, respectively. Mechanical cured compound...

The aim of the study was to establish influence poly(ethylene glycol) (PEG) on properties potential biodegradable packaging materials with antibacterial properties, based polylactide (PLA) and tea tree essential oil (TTO). obtained polymeric films consisted PLA, a natural biocide, (5-20 wt. %) prepared or without an addition 5 % PEG. PLA-based have been tested, taking into account their morphology, thermal, mechanical against Staphylococcus aureus Escherichia coli. It established that...

The aim of this work was to investigate selected biological and toxicity properties cured epoxy resin-based compounds based on a bisphenol A resin, cold-cured by polyamide containing two types metal powders (aluminum copper). This study involved cytotoxicity analysis, pH measurements, absorbance measurements sterilization. analysis conducted determine the harmful degree resin. Aimed at identifying toxic agents in compounds, an entire wavelength range. Cytotoxicity results demonstrated that...

The objective of this study was to compare the selected mechanical properties epoxy compounds based on an unmodified resin with those containing antiseptic as a modifying agent. Experiments were carried out twelve made bisphenol A (BPA) basic epoxide amount 0.48-0.51 mol/100 g. Three curing agents used: one polyamide (a polyaminoamide agent) and two amines (one adduct aliphatic amine aromatic glycidyl ether, other cycloaliphatic amine). modified by adding in form powdered boric acid (H3BO3)...

Polymeric thin films based on polylactide with an addition of poly(ethylene glycol) as a plasticizer and flavonoids in the form quercetin berberine were subjected to tests that particularly relevant from point view contact food. A comparative analysis effect individual antioxidative properties tested blueberry storage was carried out. The influence active compounds water vapor permeability, well UV protection, obtained materials investigated. Also, specific migration food simulants acetic...

The paper focuses on selected parameters of curing process – temperature and time. tests aimed at evaluating the impact short-term thermal recuring 1050A 2017A aluminium alloy sheet adhesive joints strength. Joints were formed with two different adhesives, main component which was in both cases epoxy resin Epidian 53 cure agents poliamineamide C (PAC) triethylenetetraamine (PF) agents. Curing conditions first time, time modified for each four conducted. For sake comparative analysis,...

The paper presents selected aspects of the effect primers on adhesive properties and strength aluminium sheet joints, made using polyurethane adhesives. joints was determined based two cure time variants: 15 64 h. It found that longer at a humidity 33% is more desired, as it leads to substantial increase in tested joints. In addition, variants surface preparation were applied: degreasing followed by application primer (a pro-adhesive agent). observed prior an significant compared variant...

This study investigated the effect of different surface treatment methods on strength Ti6Al4V titanium alloy sheet adhesive joints. The following were used: alkaline degreasing, anodizing, vibratory shot peening, and anodizing with vibrational peening. tests/measurements carried out during experiment: roughness measurements; microhardness measurements (conducted by Vickers hardness test method); tests single-lap joints fabricated use two epoxy adhesives, rigid flexible, both based resin...

The aim of this study was to analyse the impact adhesive samples seasoning conditions (temperature and time) on selected mechanical properties four epoxy compounds (two unmodified two modified ones). were made Epidian 53 resin mixed with different amine curing agents in appropriate stoichiometric proportions. A filler form calcium carbonate (CaCO3) powder used as a modifier. compound cured for seven days. Six variants used. Four them related time at ambient temperature 24 ± 2 °C for: one...

The article presents the issues of mechanical properties epoxy adhesives and adhesive joints strength steel sheets which were made using adhesives. aim paper is to study different resin/curing agent ratios (within above recommended stoichiometric ratio) their effect on sheets. In experimental tests three types adhesives, containing a low molecular weight resin based bisphenol A polyamide curing agent, used. single-lap joint type stainless-steel was also applied. Two test used: compressive...

The aim of this work is to assess the influence different commercial diluents on some mechanical properties two bisphenolic epoxy compounds, cold-cured by a polyamide curing agent, be employed as structural adhesives for building and industrial applications. under analysis were epoxy, bituminous, nitro, acrylic extraction. choice these products was made basis their wide availability epoxies used in construction all added small proportions, i.e., from 1 10 g per 100 resin. compounds subjected...

This research study focused on the effect of adding boric acid to epoxy resin in order obtain a composite material with improved properties and performance. To this end, fine powder (H3BO3) was introduced into different amounts, i.e., 0.5 g, 1.0 1.5 g. As matrix composites, styrene-modified based bisphenol A (BPA) (Epidian 53) used. It cross-linked two types curing agents, an amine (ET) polyamide (PAC). The mechanical obtained composites (in terms compressive strength, modulus, strain) were...