A5004632551- Polymer Nanocomposites and Properties
- biodegradable polymer synthesis and properties
- Polymer crystallization and properties
- Advanced Polymer Synthesis and Characterization
- Layered Double Hydroxides Synthesis and Applications
- Polymer Science and PVC
- Silicone and Siloxane Chemistry
- Conducting polymers and applications
- 2D Materials and Applications
- Synthesis and properties of polymers
- Polyoxometalates: Synthesis and Applications
- Polymer Nanocomposite Synthesis and Irradiation
- Photopolymerization techniques and applications
- Recycling and Waste Management Techniques
- Carbon Nanotubes in Composites
- Carbon dioxide utilization in catalysis
- MXene and MAX Phase Materials
- Additive Manufacturing and 3D Printing Technologies
- Rheology and Fluid Dynamics Studies
- Polymer composites and self-healing
- Polymer Surface Interaction Studies
- Magnesium Oxide Properties and Applications
- Advanced Photocatalysis Techniques
- Perovskite Materials and Applications
- Covalent Organic Framework Applications
Institute for the Chemistry of OrganoMetallic Compounds
2015-2025
National Research Council
2021-2025
University of Pisa
2004-2016
Istituto di Scienza e Tecnologie dell'Informazione "Alessandro Faedo"
2010-2016
Scuola Normale Superiore
2003-2007
The depletion of fossil fuels and environmental concerns have driven the development sustainable materials, including bio-based biodegradable plastics, as alternatives to conventional plastics. Although these plastics aid in waste management climate change mitigation, their vulnerability oxidative degradation impacts longevity, durability, performance. Natural antioxidants such tocopherols, flavonoids, tannins, extracted from plants or agri-food waste, present a alternative synthetic...
Abstract Polyolefins are today the most used thermoplastic materials thanks to high technology and sustainability of polymerization process, their excellent thermomechanical properties good environmental compatibility, including easy recycling. In last few decades much effort has been devoted worldwide extend applications polyolefins by conferring on them new through mixing blending with different materials. this latter context, nanocomposites have recently offered exciting possibilities....
Thermoplastic polymers like polyolefins, polyesters, polyamide, and styrene are the most representative commodity plastics thanks to their cost-efficient manufacturing processes, excellent thermomechanical properties good environmental compatibility, including easy recycling. In last few decades much effort has been devoted worldwide extend applications of such materials by conferring on them new through mixing blending with different additives. this latter context, nanocomposites have...
Poly(lactic acid) (PLA) is melt mixed with polyamide 11 (PA11) to obtain a heat-resistant fully bio-based blend PLA as the dominant component. The goal achieved by adding small amounts of organoclay (OMMT), which used manipulate microstructure. selective positioning OMMT inside PA11 and at PLA/PA11 interface turns morphology from drop/matrix into co-continuous high content (70 wt%). OMMT-rich framework that interpenetrates major phase effectively contributes bear stresses, nanocomposite...
Black phosphorus (bP) has been recently investigated for next generation nanoelectronic multifunctional devices. However, the intrinsic instability of exfoliated bP (the nanoflakes) toward both moisture and air so far overshadowed its practical implementation. In order to contribute fill this gap, we report here preparation new hybrid polymer-based materials where nanoflakes (bPn) exhibit a significantly improved stability. The have prepared by different synthetic paths including: (i) mixing...
Isotactic polypropylene (iPP) gives very extensive degradation when treated with peroxides above its melting temperature in mechanical mixers or extruders. This undesired reaction is modestly affected by maleate molecules which on the contrary actively compete side reactions of macroradicals case ethylene polymers. In this work iPP was a Brabender mixer at 180 °C peroxide and different selected capable promptly reacting macroradical formed chain converting it into more stable free radical....
Polyolefin-based materials are increasingly being used in many industrial applications for packaging, automotive and construction materials. The recent developments of research have been aimed at making these materials, often complex, mixtures, block copolymers, micro- nanocomposites with inorganic organic fillers, more efficient environmentally friendly (through recycling processes, the use bio-polyolefins). In this context, functionalized polyolefins, on one hand, play a fundamental role...
Immobilizing natural antioxidant and biologically active molecules in layered double hydroxides (LDHs) is an excellent method to retain release these substances a controlled manner, as well protect them from thermal photochemical degradation. Herein, we describe the preparation of host-guest systems based on LDHs rosmarinic glycyrrhetinic acids, two obtained extraction herbs licorice root, respectively, with antioxidant, antimicrobial, anti-inflammatory properties. Intercalation between...
Abstract Combining oxidative plasma pre‐treatment of carbon fibers (CFs) with subsequent functionalization branched polyethyleneimine (b‐PEI) resulted in b‐PEI‐modified CFs. First, CFs were oxidized by treatment, dipped into a water solution b‐PEI, and finally heated to promote reactions between the amine functionalities b‐PEI carboxyl groups generated activation. By ajusting operational parameters low‐pressure oxygen concentration, reaction time, we could modulate content grafted b‐PEI. The...
Abstract The functionalisation of a low molecular weight, liquid 1,2‐polybutadiene (PBL) was performed by the addition either N ‐acetyl‐ L ‐cysteine or its methyl ester through thiol‐ene radical reaction. runs were carried out in 1,4‐dioxane solution and presence free initiator (2,2′‐azobisisobutyrronitrile, AIBN). initial feed ratio polymer / cysteine derivative varied, order to highlight occurrence side reactions understand their possible influence on process. 1 H NMR determination degree...
Low density polyethylene/layered double hydroxide (LDH) composites were prepared via melt compounding using different kinds of organo-LDHs and polyethylene-grafted maleic anhydride as the compatibilizer.The successfully by converting a commercial MgAl-carbonate LDH into MgAl-nitrate LDH, which was later modified anion exchange with linear branched sodium alkyl sulfates having chain lengths (n c = 6, 12 20).It observed that, depending on size surfactant chain, degrees polymer intercalation...
Abstract Post‐polymerization modification is an attractive approach to extend applications and convert commodity plastics into products with new, desirable tunable properties. Among the post‐polymerization methods, nitroxide radical coupling (NRC) reaction has been shown be a convenient versatile way graft specific functionalities onto polymer chains control onset yield of crosslinking during peroxide‐initiated processes. The use 2,2,6,6‐tetramethylpiperidine‐1‐oxyl (TEMPO) its derivatives...
Abstract The extent of interphase interactions between polymer phase and inorganic particles is the driving force addressing preparation/properties design in field corresponding micro‐ nanocomposites. In case preparation nanocomposites based on polyolefins (POs) compounds as potentially nanodispersed phase, use a PO with proper functional groups necessary for interface adhesion stabilization nanostructured morphology. According to this approach, ethylene/propylene copolymers different...
Abstract Nitroxyl radicals were used as functionalizing agents during the free radical postreactor modification process of polyolefins carried out in melt. The 4‐hydroxy‐2,2,6,6‐tetramethylpiperidine‐1‐oxyl (HO‐TEMPO) and 4‐benzoyloxy‐2,2,6,6‐tetramethylpiperidine‐1‐oxyl (BzO‐TEMPO) successfully grafted onto a polyethylene‐based material (ethylene‐ co ‐1‐octene copolymer) by coupling reaction with polymer macroradicals; these last formed H‐abstraction through peroxide addition....
Abstract Poly(lactic acid) ( PLA ) was plasticized with ester oligomers having different structure, molecular weight and carboxylic acid content as end‐functionalities. In particular a low‐molecular‐weight polyester of adipic 1,2‐propanediol (an adipate‐based derivative) were used compared. The plasticizing capability tested the final structural thermal properties matrix evaluated by correlating various features to chemical physical characteristics these additives. SEC , DSC TGA tensile...
Abstract Low‐density polyethylene/layered double hydroxide (LDPE/LDH) nanocomposites were prepared via melt extrusion using organo‐LDH particles and maleic anhydride functionalized polyethylene as compatibilizer. Processing parameters, preparation method, feed composition properly modulated until obtaining with intercalated/exfoliated morphologies, an uniform distribution of nanolayers, evidenced by X‐ray diffraction transmission electron microscopy analysis. These materials showed a...