A5000825586- Asphalt Pavement Performance Evaluation
- Infrastructure Maintenance and Monitoring
- Concrete Corrosion and Durability
- biodegradable polymer synthesis and properties
- Polymer Nanocomposites and Properties
- Thermal and Kinetic Analysis
- Energetic Materials and Combustion
- Polymer crystallization and properties
- Microplastics and Plastic Pollution
- Rocket and propulsion systems research
- Recycling and Waste Management Techniques
- Natural Fiber Reinforced Composites
- Concrete and Cement Materials Research
- Collagen: Extraction and Characterization
- Odor and Emission Control Technologies
- Pigment Synthesis and Properties
- Polymer composites and self-healing
- Nanocomposite Films for Food Packaging
- Vehicle emissions and performance
- Petroleum Processing and Analysis
- Flame retardant materials and properties
- Smart Materials for Construction
- Carbon dioxide utilization in catalysis
- Mechanical Systems and Engineering
- Technology Assessment and Management
University of Pisa
2016-2025
This study focused on the development of a novel biocomposite material formed by thermoplastic biodegradable polyester, poly(butylene succinate-co-adipate) (PBSA), and carbonaceous filler as biochar (BC) derived pyrolysis woody biomass waste. Composites with various BC contents (5, 10, 15, 20 wt.%) were obtained melt extrusion investigated in terms their processability, thermal, rheological, mechanical properties. In all composites, lowered viscosity, behaving lubricant, enhancing composite...
In this work are reported preparation, properties and biodegradability in different environments of composites based on Poly (butylene succinate-co-adipate) (PBSA) Poly(3-hydroxybutyrate-3-hydroxyvalerate) (PHB-HV) as polymeric matrix, with filler from insect exoskeleton (I), a by-product obtained grinding the insect’s post-protein extraction dry biomass. The were produced by melt extrusion characterized terms processability, thermal stability, morphology, me-chanical to select formulations...
In this work, by-products from insect farming valorisation are proposed as filler in biocomposite production, with relevant biodegradation compost and valuable thermal mechanical properties. Thus, we report on the preparation, properties, biodegradability of composites based Poly(butylene succinate-co-adipate) (PBSA) Poly(3-hydroxybutyrate-3-hydroxyvalerate) (PHB-HV) (70/30% by weight a polymeric matrix, exoskeleton (I) up to 15% 85% matrix. The biomass was by-product obtained grinding...
Tanning industries emit a huge quantity of Volatile Organic Compounds (VOCs), including hydrophilic and hydrophobic solvents. In this study, vegetable oil/water emulsions with 2 5 vol.% corn oil (O) or waste cooking (WCO) were prepared. Their potential as absorbents n-butyl acetate (BA), in place water, was investigated to increase the efficiency tannery wet scrubbers. BA selected representative component VOC emissions derived from leather finishing processes. Static dynamic absorption tests...
In azidic binders for solid propellants, the N3 functionality is introduced by substitution of a halogen or tosyl group, but recently mesyl group has been suggested as an alternative. The mesylate two advantages, mainly related to its small dimensions and low cost. Poly(glycidyl azide) poly 3-azidomethyl-3-methyl oxetane were prepared using both tosylate precursors. azidation kinetics studied at three different temperatures while keeping all other operating parameters same. results confirmed...
Polymeric binders for solid propellants are usually based on hydroxyl-terminated polybutadiene (HTPB), which does not contribute to the overall energy output. Azidic polyethers represent an interesting alternative but may have poorer mechanical properties. Polybutadiene–polyether copolymers combine advantages of both. Four different ether-butadiene-ether triblock were prepared and azidated starting from halogenated and/or tosylated monomers using HTPB as initiator. The presence butadiene...
Abstract Glycidyl azide polymer (GAP) is an “energetic” alternative to hydroxyl‐terminated polybutadiene (HTPB), but has poorer mechanical properties. Since HTPB‐GAP blends are markedly biphasic, the use of block copolymers may be solution join advantages both. The were synthesized from homopolymers by using two chain extenders: hexamethylene diisocyanate (HDI) and adipoyl chloride (AdCl). Both reagents gave homogeneous stable polymeric mixtures, with HDI there risks gelation during...
Abstract Glycidyl azide‐butadiene block copolymers are potential binders for solid propellants. The azidic part contributes to the overall energy outputs, while butadiene improves mechanical properties. Synthetic strategies proposed in literature not appropriate production of large‐scale quantities. mesylation one homopolymer, followed by reaction with OH terminal groups second is here. simple and does show drawbacks previously suggested alternatives. can be used as “partially” energetic...
Abstract In the present study, Lauryl Gallate (LG), a natural antioxidant, was used to improve polymer thermal stability and recyclability of biodegradable polyester as poly(butylene succinate- co -adipate) (PBSA). Neat PBSA PBSA/LG (0.5 wt% LG) blends were processed by melt extrusion subjected multiple consecutive cycles at 170 °C prevent occurrence thermo-oxidative radical degradation processes polymer. Thermal, rheological, morphological, FTIR, GPC analyses showed beneficial effect LG in...
When properly compatibilized, the blending of polyethylene (PE) and polyamide (PA) leads to materials that combine low prices, suitable processability, impact resistance, attractive mechanical properties. Moreover, possibility using these polymers without prior separation may be a opportunity for their recycling. In this work, use an epoxidized waste vegetable oil (EWVO) was investigated as green compatibilizer precursor (CP) reactive high-density PE (HDPE) with polyamide-6 (PA6). EWVO...
The oxidative aging of bituminous binders affects the performance and durability pavements. In case polymer-modified binders, involves both bitumen polymers has a strong impact on whole architecture material. Rheology may help in understanding these structural changes, interesting information be obtained by analysing evolution apparent molecular weight distributions. This was demonstrated with binder modified poly(styrene-butadiene) block copolymer subjected to prolonged artificial aging....
The δ-method has been developed to estimate molecular weight distributions of bitumens from phase-angle master curves. method uses a correlation between the cross-over frequency(ωC) and (MW) that was average MW measured by vapour pressure osmometry. This study proposes revised whose parameters have calculated Gel Permeation Chromatography (GPC), which can be conducted at low level dilution preserving interactions in bitumen bulk. Furthermore, data GPC allow optimisation considering entire...
Polyurethanes (PUs) are one of the most versatile polymeric materials, making them suitable for a wide range applications. Currently, petroleum is still main source polyols and isocyanates, two primary feedstocks used in PU industry. However, due to future price uncertainties need eco-friendly alternatives, recent efforts have focused on replacing petrol-based isocyanates with counterparts derived from renewable resources. In this study, waste cooking oil was as feedstock obtain (POs) new...
Rheology is the most widely used technique to evaluate performance and aging of bituminous binders. Since there are many available rheological tests, also a wide range indexes it not easy choose appropriate one, because single value may hardly be adequate for different properties or operating conditions. In order generalize usefulness an index, good starting point deriving from set data, such as master curves linear viscoelastic functions. Then, problem quantification in numerical continuous...
The addition of rejuvenators agents (RJ) into bitumen allows increasing the amount recycled asphalt in new mixtures. In preliminary part this study, three different type oils were tested as potentials RJ: a mineral oil from automotive industry, waste domestic cooking vegetable (VO), and biodiesel. Several mixtures prepared by adding percentage VO was individuated best RJ. Therefore, used further investigation, to better characterize properties rejuvenated binder its resistance aging during...