G12: Polymeric composites and nanocomposites
Dynamic Mechanical Analyzer DMA Q800
DMA is used to measure the mechanical properties of a wide range of materials. Many materials, including polymers, behave both like an elastic solid and a viscous fluid, thus the term viscoelastic. DMA measures the viscoelastic properties using either transient or dynamic oscillatory tests. Storage modulus (E’), the elastic component is related to the sample’s stiffness and Loss modulus (E”) the viscous component is related to the sample’s ability to dissipate mechanical energy through molecular motion. Tan δ is parameter that provides information on the relationship between the elastic and inelastic components.
Simultaneous DSC-TG Analyser coupled with Mass Spectrometer (SDT-MS) SDT Q600 / ThermoStar TM GSD 301 T
Simultaneous DSC-TGA SDT Q600 is an analysis instrument capable of performing both differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) at the same time. The SDT measures the heat flow and weight changes associated with transitions and reactions in materials over the temperature range ambient to 1500°C. The information provided differentiates endothermic and exothermic events which have no associated weight change (e.g., melting and crystallization) from those which involve a weight change (e.g., degradation). Modes of Operation: – Standard: Ramp / Isothermal – Stepwise Isothermal – Cyclic – Evolved Gas Analysis High Resolution SDT.
Thermogravimetric Analyzer TGA Q5000IR
The Thermogravimetric Analyzer measures the amount and rate of weight change in a material, either as a function of increasing temperature, or isothermally as a function of time, in a controlled atmosphere. It can be used to characterize any material that exhibits a weight change and to detect phase changes due to decomposition, oxidation, or dehydration. Modes of Operation: Standard TGA, Hi-Res TGA, Auto Stepwise TGA, Modulated TGA, Evolved Gas Analysis – EGA (TGA/MS and/or TGA/FTIR Operation).
Differential Scanning Calorimeter DSC Q2000
The Differential Scanning Calorimeter (DSC) determines the temperature and heat flow associated with material transitions as a function of time and temperature. It also provides quantitative and qualitative data on endothermic (heat absorption) and exothermic (heat evolution) processes of materials during physical transitions that are caused by phase changes, melting, oxidation, and other heat-related changes.
Atomic force microscope Multimode 8
Atomic force microscope is designed to the characterization of polymers and polymer nanocomposites surface. AFM investigations provide information on the surface topography, adhesion, morphology (crystalline phase, nanoparticles dispersion) and roughness. PFQNM can generate material property maps at nanolevel.
Nanomechanical testing instrument Hysitron TriboIndenter Premier
The TriboIndenter (TI) Premier makes nanoscale mechanical and tribological characterization simple and consistent. This dedicated system provides a variety of standard nanoscale characterization techniques with unparalleled accuracy and precision. The TI Premier comes with in situ SPM imaging capability and capacitive transducer technology, making the system applicable to the widest range of materials and devices. Motorized staging, top-down color optics, anti-vibration system, environmental enclosure, control software, and fast digital electronics decrease time to results and ease instrument use. The TI Premier offers automated testing routines for increased testing throughput and minimized operator interaction.
Equipment for the measurement of interfacial properties CAM200
CAM 200 allows the evaluation of hydrophilicity/hydrophobicity of the materials surface, surface tension and interfacial adhesion of polymer blends and composites and the effectiveness of the surface treatments of polymers or organic/inorganic (nano) fillers. For the measurement of the contact angle and interfacial/surface tension, the shape of the droplet is analyzed using the captured images.
Equipment for impact testing of polymer composites – HIT 5.5P Pendulum Impact Tester
The Pendulum Impact Tester HIT5.5P can be used for the determination of impact resistance on plastics and other materials. The impact tester can be equipped with accessories for Charpy, Izod, Dynstat, and impact tensile according to the following standards: Charpy: ISO 179-1, ASTM D6110, DIN 50115 Izod: ISO 180, ASTM D256 (notched) and D4812 (without notch) Impact tensile: ISO 8256-A and 8256-B, ASTM D1822 (spec. in head) Dynstat: DIN 53435
Equipment for physico-mechanical characterization, Universal Testing Machine Instron 3382
The Instron 3382 floor model testing system is suited for mechanical characterization of materials in tension, compression, peel and bending (3-Point Bend Flexure) up to 100 kN (22,400 lbf). It meets or exceeds ASTM E4, BS 1610, DIN 51221, ISO 7500/1, EN 10002-2 standards.
Buchi SFS Laboratory Pressure Reactors BuchiGlasUster SFS Reactor #02.5196
SFS Laboratory Pressure Reactor modular-setup: – Coverplate with 4×1⁄4″ NPT openings, – Easy interchange of different pressure reactors – Pressure vessels in Borosilicate glass 3.3, Stainless steel for different temperature / pressure ratings, – Reactor volume: 0.50 – 5.0 liter – Temperature control by thermostat with double jacket or electrical heating: – 20 °C to +250 °C – Pressure: -1 (FV) to +6 – 12 bar (glass reactors) / 40 – 100 bar (stainless steel reactors) Chemical reactions, applications: – Polymerization reactor – Chemical synthesis reactor – Catalyst testing / evaluation – Biopolymer research – Nanoparticle synthesis
Platen Press P 200 E
DATA SHEET: – Two platen press with four-column construction and cooling cassette – Nominal platen size 200 × 200 mm; – Hydraulic force 120 kN; – Max specific pressure 312 N/cm2; – Motor power 0.8 kW; – Max operating temperature 300 °C. DESCRIPTION: Laboratory press with automatic cycle, fine adjustable temperature and high force of sealing the mould to ensure the compression molding of micro and nanocomposites with thermoplastic polymer matrices. The press is also designed for the preparation of the films with the thickness of less than 200 µm necessary.
Leistritz LSM 30.34
Modular intermeshing co-rotating twin screw extruder for melt mixing and masterbatch obtaining at laboratory scale. It is equipped with: – eight heating zones – seven air-cooled zones – a degassing zone – horizontal dosing feed – forced feeder – can measure the pressure and temperature of the molten material – K-Tron feeder Accessories: die head for strand die, water bath and granulator.
Brabender LabStation –System for rheological characterization and melt processing of polymers and composites
Brabender LabStation is a complex system for melt rheology characterization and preparation of composite by melt compounding and extrusion, rolling and film blowing. It has several interchangeable devices such as mixing chambers, double screw extruder, film blowing system and accessories (two roll mill, granulator, conveyor belt, blown film take off unit).
Injection Molding Machine ENGEL VC 60/28
Injection unit 60 Dosing path 100 mm Diameter of screw Ø20 Max. volume of injection 31 cm³ Max. screw speed 450 rpm L / D ratio 24 Plasticizing capacity 4 g/s Max. injection pressure 2200 bar Stroke of nozzle 230 mm Number of heating zones, including nozzle [no.] 4 Clamping force 280 kN Opening stroke 400 mm Height of mould min. 150 mm Max distance between mould platens 550 mm Max. weight of mould 600 kg Number of cooling circuits for the mold 4 Ejector stroke 100 mm Ejector force 40 kN
Panaitescu D.M., Popa M.S., Raditoiu V., Frone A.N., Sacarescu L., Gabor A.R., Nicolae C.A., Teodorescu M.
Effect of calcium stearate as a lubricant and catalyst on the thermal degradation of poly (3-hydroxybutyrate)
International Journal of Biological Macromolecules, Volume 190, November 2021
Purcar V., Rădițoiu V., Alina Rădițoiu A., Raduly F.M., Ispas G.C., Căprărescu S., Frone A.N., Trică B., Nicolae C.A., Anastasescu M., Stroescu H.
Effect of modified silica materials on polyvinyl chloride (PVC) substrates to obtain transparent and hydrophobic hybrid coatings
Applied Sciences, Volume 11, November 2021
L. Iancu, R.M. Ion, R. M. Grigorescu, P.N. Ghioca, M.E. David, R.E. Andrei, G.I. Radu, M.I. Filipescu, R.I. Suica-Bunghez, C.A. Nicolae, R. Somoghi, B. Trica, S. Teodorescu
Surface consolidation of model stone samples with carbonated hydroxyapatite
Priochem XV, 30 oct – 01 nov 2019, Bucharest, Romania