A5064922627- Synthesis and properties of polymers
- Polymer Nanocomposites and Properties
- Polymer composites and self-healing
- Silicone and Siloxane Chemistry
- Crystallization and Solubility Studies
- Dielectric materials and actuators
- Advanced Sensor and Energy Harvesting Materials
- X-ray Diffraction in Crystallography
- Thermal and Kinetic Analysis
- Epoxy Resin Curing Processes
- Lignin and Wood Chemistry
- biodegradable polymer synthesis and properties
- Natural Fiber Reinforced Composites
- Flame retardant materials and properties
- Hydrogels: synthesis, properties, applications
- Photopolymerization techniques and applications
- Wood Treatment and Properties
- Advanced Polymer Synthesis and Characterization
- Conducting polymers and applications
- Tribology and Wear Analysis
- Ferroelectric and Piezoelectric Materials
- Pigment Synthesis and Properties
- Drug Solubulity and Delivery Systems
- Dyeing and Modifying Textile Fibers
- Polymer crystallization and properties
Romanian Academy
2012-2024
Institutul de Chimie Macromoleculară Petru Poni
2015-2023
Institute of Macromolecular Chemistry
2014-2019
Grigore T. Popa University of Medicine and Pharmacy
2016
Gheorghe Asachi Technical University of Iași
2011
Epoxy resins are widely used in the manufacturing of fire safety products industry. 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) is a commercially available non-toxic reactive flame retardant and its incorporation improves behavior epoxy systems by releasing active phosphorus species to gas phase. The reaction between DOPO oxirane moieties negatively affects glass transition temperature epoxy-based composites thus overcome this drawback, it usually modified obtain non-reactive...
Epoxy resins are widely applied in industry for producing fire safe materials. Unfortunately, epoxy have the disadvantage of being highly flammable and thus require suitable modifications with reactive or non-reactive flame retardant additives. Recent literature shown that derivatives 9,10–dihydro–9–oxa–10–phosphaphenanthrene–10–oxide (DOPO) most researched retardants resins. Both classes DOPO generally endow high thermal stability, non–oxidative character, water resistance excellent...
The effects of electron beam irradiation on the properties ethylene propylene diene monomer (EPDM)/butyl rubber composites in presence a polyfunctional were investigated by means differential scanning calorimetry (DSC), thermal analysis, microscopy (SEM), attenuated total reflection absorption infrared spectroscopy (ATR-IR), and mechanical surface energy measurements. samples exposed over wide range doses (20⁻150 kGy). EPDM matrix was modified with butyl rubber, chlorobutyl bromobutyl...
The study describes the curing and thermal behavior of a new castor oil maleic anhydride adduct/epoxy oils/5–Bromosalicylic acid coatings their composites with wood. epoxidized oils were flax hemp. kinetic parameters degradation processes calculated. resistance coated wood surfaces against Cladosporium cladosporioides, Aspergillus brasiliensis, Penicillium chrysogenum was tested. Color changes, FT–IR SEM conducted before after fungal attack. decay color change raw treated samples fungi Based...
Traditional materials are being constantly replaced by synthetic polymers, most of which highly flammable. Epoxy resins versatile and among the important class due to their multiple crosslinking capacity endowed oxirane ring, applications ranging from adhesives aeronautics. This study investigates comparative effect three hardeners (aromatic, cycloaliphatic, aliphatic) addition an oligophosphonate on thermal behavior fire performance bisphenol A diglycidyl ether semi–interpenetrating polymer...
Polymers play a crucial role in multiple industries; however, surface modification is necessary for certain applications. Exposure to non-thermal plasma provides viable and environmentally beneficial option. Fused deposition molding utilizes biodegradable polylactic acid, although it encounters constraints biomedical applications as result of inadequate mechanical characteristics. This study investigates the effects atmospheric pressure generated by dielectric barrier discharge system using...
The locomotion of various organisms relies on the alternated elongation-contraction their muscles or bodies. Such biomimicry can offer a promising approach to developing soft robotic devices with improved mobility and efficiency. Most strategies mimic such motions rely reversible size modifications some materials upon exposure external stimuli. An example is combination liquid crystals (LCs) elastomers that afford programmable shape morphing heat treatment. This strategy supposed involve...
A novel bio-based flexible epoxy resin from castor oil maleate and diglycidyl ether of bisphenol was synthesized its thermal electrical properties were investigated.
Original interpenetrating polymer networks suitable for active dielectric elements in actuation devices were prepared by using a dual compatibilization pathway.
The present study reports fullerene conjugates that act as efficient binders of double stranded DNA (dsDNA) into cytofriendly polyplexes. are designed to generate dendrimeric structures, having C60 the core and bearing linear or branched PEI polyethyleneglycol (PEG) arms (∼2 kDa). Simple reproducible synthesis pathways provided C60-PEI C60-PEG-PEI conjugates. They were able bind plasmidic dsDNA they form particulate polyplexes 50 200 nm in diameter. resulted toggle between anionic cationic...
Novel polysiloxanes with dielectric properties which are systematically fine-tuned by utilizing thiol-ene post-polymerization reactions of a polymethylvinylsiloxane various ratios 1-butanethiol and 3-mercaptopropionitrile is presented.
The paper describes new epoxy derivatives and their influences on wood thermal fungi stability. Epoxy were thermally photochemically cross-linked. softwood samples, modified with succinic anhydride, impregnated individually or in the mixture glycidyl methacrylate, diglycidyl ether of bisphenol A, epoxidized grapeseed oil cross-linked afterward. samples methacrylate first exposed to UV at 254 nm for 30 min all surfaces 5 h 130 °C 150 °C. characterized by thermogravimetric analysis decay...
Recently, the development of new materials with desired characteristics for functional tissue engineering, ensuring architecture and supporting cellular growth, has gained significant attention. Hydrogels, which possess similar properties to natural matrixes, being able repair or replace biological tissues support healing process through proliferation viability, are a challenge when designing scaffolds. This paper provides insights into hydrogel-based polymeric blends (hydroxypropyl...
In this study, the effects of three diamine curing agents (aromatic, cycloaliphatic, aliphatic) on photochemical behavior bisphenol A diglycidyl ether networks were comparatively examined. order to monitor structural changes and study agents' action mode, cured epoxy resins characterized before after photoirradiation by means Fourier-transform infrared spectroscopy, contact angle, differential scanning calorimetry, electron microscopy, energy-dispersive X-ray analysis, mass loss, color...
A new polyurethane network was synthesized by the Diels–Alder cross-linking reaction of a to bisfuryl monomer. Attenuated total reflectance in conjunction with Fourier transform infrared spectroscopy (ATR-FTIR) spectra showed disappearance absorption bands maleimide and appearance attributed furan-maleimide cycloadduct. Chemical shifts characteristic cycloadduct appeared proton nuclear magnetic resonance spectra. ATR-FTIR differential scanning calorimetry (DSC) demonstrated thermal...
Cross-linked poly(ether-urethane)s were prepared by Diels-Alder (DA) reaction of the furan-containing poly(ether-urethane) to bismaleimides and showed thermal reversibility evidenced differential scanning calorimetry attenuated total reflectance in conjunction with Fourier transform infrared spectroscopy (ATR-FTIR).The synthesized polyaddition 1,6-hexamethylene diisocyanate (HMDI) or 4,4!dibenzyl (DBDI) poly(tetramethylene ether) glycol (PTMEG having M n = 250, 650, 1000, 1500 2000)...