A5084256205- Epoxy Resin Curing Processes
- Polymer composites and self-healing
- Thermal and Kinetic Analysis
- Synthesis and properties of polymers
- Photopolymerization techniques and applications
- Polymer Nanocomposites and Properties
- Advanced Polymer Synthesis and Characterization
- Lignin and Wood Chemistry
- Polymer crystallization and properties
- Flame retardant materials and properties
- Wood Treatment and Properties
- Silicone and Siloxane Chemistry
- Polymer Science and PVC
- Inorganic and Organometallic Chemistry
- Natural Fiber Reinforced Composites
- Pigment Synthesis and Properties
- Collagen: Extraction and Characterization
- biodegradable polymer synthesis and properties
- Dyeing and Modifying Textile Fibers
- Cultural Heritage Materials Analysis
- Wood and Agarwood Research
- Metal Extraction and Bioleaching
- Carbon dioxide utilization in catalysis
- Photochromic and Fluorescence Chemistry
- Nanotechnology research and applications
Institute of Macromolecular Chemistry
2014-2019
National Institute of Research and Development for Electrochemistry and Condensed
2015
Polytechnic University of Timişoara
2015
Romanian Academy
2001-2013
Institutul de Chimie Macromoleculară Petru Poni
2001-2011
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 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...
The curing kinetics of diglycidyl ether 4,4′-bisphenol (DGEBP) epoxy mesogenic resin in the presence sulphanilamide (SAA) was studied by non-isothermal differential scanning calorimetry (DSC) at different heating rates. At low rates (2–5 °C min−1), reaction takes place two processes evidenced a double peak on DSC thermograms. first process is due to primary amine with epoxy, while second one corresponds formation crosslinked network liquid crystalline (LC) properties attack secondary...
A novel bio-based flexible epoxy resin from castor oil maleate and diglycidyl ether of bisphenol was synthesized its thermal electrical properties were investigated.
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...
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 series of semi-interpenetrated polymer networks based on bisphenol epoxy resin and polyurethane was synthesized by sequential procedure. The molecular dynamics incorporated in the network with increasing amounts followed dynamic mechanical analysis. All phenomena that concur material are evaluated cross-examination storage modulus ( E'), loss E'') factor (tan δ) variation temperature. Complex aspects were elucidated consecutive heating-cooling-heating cycles calculating apparent activation...
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...