Article
Biochemistry & Molecular Biology
Yang-Chin Kao, Wei-Cheng Chen, Ahmed F. M. EL-Mahdy, Meei-Yu Hsu, Chih-Hao Lin, Shiao-Wei Kuo
Summary: In this study, a difunctionalized cyanate ester double-decker silsesquioxane (DDSQ-OCN) cage was prepared to improve the thermal behavior of epoxy resin. The covalently bonded network structure formed by the copolymerization of epoxy and OCN units, as well as the hydrogen bonding between the OH groups of epoxy and the SiOSi moieties of DDSQ units, enhanced the physical properties of the material. The addition of Cu(II)-acac accelerated the thermal polymerization process but decreased the thermal stability.
Article
Chemistry, Multidisciplinary
Evangelia Tarani, Klementina Pusnik Cresnar, Lidija Fras Zemljic, Konstantinos Chrissafis, George Z. Papageorgiou, Dimitra Lambropoulou, Alexandra Zamboulis, Dimitrios N. Bikiaris, Zoi Terzopoulou
Summary: Featured Application PLA nanocomposites are explored as antimicrobial bio-nanocomposites for food packaging or biomedical applications. Metal oxide nanofillers affect the thermal stability of PLA and act as heterogeneous nucleating agents, accelerating the crystallization process and reducing activation energy.
APPLIED SCIENCES-BASEL
(2021)
Article
Thermodynamics
Roberta Motta Neves, Heitor Luiz Ornaghi, Felipe Gustavo Ornaghi, Sandro Campos Amico, Ademir Jose Zattera
Summary: This study investigated the thermal stability and lifetime prediction of nanocomposites by incorporating cellulose nanofibers (CNFs) and cellulose nanocrystals (CNCs) into polystyrene (PS). The research found that the reinforcement content did not affect the thermal degradation behavior, and lifetime prediction based on kinetic analysis was successfully applied. The nanocellulose morphology influenced the lifetime prediction of the nanocomposites.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Applied
Ya-Fang Yan, Xiao-Bo Liang, Yan-Long Feng, Lin-Fang Shi, Rui-Pin Chen, Jian-Zhong Guo, Ying Guan
Summary: In this study, cellulose nanocrystals (CNC) were used as a template to prepare four morphologies of CNC-ZnO nanocomposites, and CNC-ZnO/polylactic acid (PLA) composite films were obtained. The CNC-ZnO nanocomposites acted as heterogeneous nucleating agents, improving the crystallinity of the PLA films. The dimensional, size, and apparent morphology of the CNC-ZnO nanoparticles could regulate the thermal properties.
CARBOHYDRATE POLYMERS
(2023)
Article
Nanoscience & Nanotechnology
Haixiang Song, Qiqi Zhang, Yanwei Zhang, Yanfei Wang, Zhongyuan Zhou, Ping Zhang, Bingnan Yuan
Summary: The influence of 3-amino-polyhedral oligomeric silsesquioxane (NH2-POSS) on waterborne polyurethanes (WPU) was studied by synthesizing NH2-POSS modified WPUs. The addition of NH2-POSS improved the dispersion stability and thermal stability of WPU, while also enhancing hydrophobic properties.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Engineering, Chemical
Sebastian Simu, Adriana Ledeti, Elena-Alina Moaca, Cornelia Pacurariu, Cristina Dehelean, Dan Navolan, Ionut Ledeti
Summary: This study analyzes the thermal stability and decomposition kinetics of ethinylestradiol (EE), a widely used synthetic derivative of estradiol. The results show that the main decomposition process of EE in the temperature range of 175-375 degrees Celsius is a single-step process, unaffected by the heating rate of the sample.
Article
Engineering, Environmental
Dhorali Gnanasekaran, A. Ashokbabu, P. Thomas
Summary: A comprehensive thermal degradation analysis was conducted on pure bio-polymer and dimer fatty acid-based polyamides-polyhedral oligomeric silsesquioxane (BP-POSS) nanocomposite to evaluate their thermal degradation through kinetics. BP-POSS nanocomposites were prepared using biodegradable biopolymer and 12.5 wt% of POSS nanomaterial. The physical coordination between the polymer and POSS nanomaterial in the prepared nanocomposites was analyzed. Dielectric properties and activation energies were measured for both pure-BP and BP-POSS nanocomposites. The remarkable thermal stability of BP-POSS 12.5 wt% nanocomposite was observed due to the reinforcement of POSS molecules. A nth order reaction kinetic model was proposed for the degradation process of pure BP and its POSS nanocomposites, and the model was validated by correlating experimental and simulated conversion thermogram.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Chemistry, Physical
Traian Zaharescu, Ignazio Blanco, Marius Maris
Summary: This study analyzed the stability of modified inorganic filler, dumbbelled POSS powders. The radiochemical stability was investigated through gamma-irradiation and activation energies for delaying oxidation were calculated. The results showed that the stabilization property of the filler is closely related to the activation energies required for oxidation and the resistance of internal bridges in dumbbell POSSs. These findings are important for the development of stabilizers for polymer materials under radiation sterilization.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Kui Wang, Hang Liu, Chong Wang, Weijiang Huang, Qin Tian, Qiuping Fu, Wei Yan
Summary: The synergistic effects of SiO2 nanoparticles and DiDOPO can significantly enhance the flame-retardant performance of EP, while also improving its thermal stability and mechanical properties.
Article
Food Science & Technology
Sara Kalantari, Leila Roufegarinejad, Sajad Pirsa, Mehdi Gharekhani, Mahnaz Tabibiazar
Summary: The study successfully achieved co-pigmentation of anthocyanin in pomegranate juice by the PPE-beta-CD complex, which enhanced the stability of total phenolic, total flavonoid content, and antioxidant activity. In addition, fortification with PPE decelerated the degradation rate of anthocyanin, increased the half-life of the juices, and resulted in a higher color index at the end of the 60-day storage period.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Polymer Science
Michael R. Martinez, Dirk Schild, Ferdinando De Luca Bossa, Krzysztof Matyjaszewski
Summary: Polymer recycling is gaining increasing attention in the context of a circular economy. This study reports the depolymerization of poly(methyl methacrylate) (PMMA) and poly(n-butyl methacrylate) (PBMA) through controlled radical polymerizations mediated by iron chloride salts and iron powder. The most effective depolymerization was achieved using zerovalent Fe0 as a supplemental activator and reducing agent.
Article
Polymer Science
Michael R. Martinez, Dirk Schild, Ferdinando De Luca Bossa, Krzysztof Matyjaszewski
Summary: This study reports the depolymerization of polymers using iron chloride salts and iron powder as mediators under high temperature conditions. The results showed that this approach achieved high conversion and depolymerization rates under specific conditions, and the monomers in the depolymerization products were successfully recovered through distillation.
Article
Chemistry, Applied
Dheeraj Ahuja, Lokesh Kumar, Anupama Kaushik
Summary: The study investigated the thermal stability and degradation kinetics of glycerol plasticized starch nanocomposites reinforced with cellulose nanofibers extracted from wheat straw. Results showed that surface modifications of CNFs had an impact on improving thermal degradation behavior, with m-CNF/GPS bionanocomposites films exhibiting superior morphology and enhanced thermal stability and water vapor permeability. The addition of CNFs also significantly increased the activation energy, demonstrating a consequential relation between morphology and thermal stability.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Multidisciplinary
Mengni Shi, Yinyong Ao, Lei Yu, Lang Sheng, Shuangxiao Li, Jing Peng, Hongbing Chen, Wei Huang, Jiuqiang Li, Maolin Zhai
Summary: In this study, epoxy POSS (ePOSS)/silicone rubber (SR) nanocomposites with excellent properties were prepared. The addition of a small amount of ePOSS not only improved the mechanical properties of the matrix, but also significantly enhanced its thermal stability. Compared to SR, ePOSS/SR exhibited higher radiation stability, and the mechanism of radiation-induced crosslinking and degradation of the nanocomposites was proposed by analyzing the changes in chemical structure, thermal properties, mechanical properties, and gas products.
CHINESE CHEMICAL LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Mayu Nagao, Taihei Hayashi, Hiroaki Imoto, Kensuke Naka
Summary: Dumbbell-shaped polyhedral oligomeric silsesquioxane (POSS) derivatives with unsymmetrical structures exhibit hybrid properties in solubility and thermal behavior, showing potential to improve the thermal degradation performance of compounds.
Article
Polymer Science
Claudio Tosto, Eugenio Pergolizzi, Ignazio Blanco, Antonella Patti, Paul Holt, Sarah Karmel, Gianluca Cicala
Review
Polymer Science
Valentina Siracusa, Ignazio Blanco
Editorial Material
Polymer Science
Ignazio Blanco, Roberto Pantani, Antonio Pizzi, Andrea Sorrentino
Review
Chemistry, Multidisciplinary
Sneha Samal, Marcela Skodova, Lorenzo Abate, Ignazio Blanco
APPLIED SCIENCES-BASEL
(2020)
Editorial Material
Polymer Science
Ignazio Blanco
Review
Chemistry, Physical
Ignazio Blanco, Valentina Siracusa
Summary: The increasing public pressure surrounding environmental issues is driving both industrial and academic research areas to design material architectures using renewable sources. Thermal analysis techniques such as DSC, DTA, DMA, and TGA play a crucial role in understanding material properties and guiding the best design and preparation processes during the transition from fossil to renewable feedstock.
Article
Materials Science, Composites
Traian Zaharescu, Ignazio Blanco, Tunde Borbath, Istvan Borbath, Marius Maris
Summary: This paper proposes a reliable alternative for enhancing the stability of polypropylene (PP) by using modified polyhedral oligomeric silsesquioxanes (POSS). The study suggests that structures of modified POSS with substituents can effectively delay oxidative degradation, thus improving the stability of polypropylene.
JOURNAL OF COMPOSITES SCIENCE
(2021)
Review
Materials Science, Multidisciplinary
Sneha Samal, Ignazio Blanco
Summary: This article reviews the application of fiber-reinforced geopolymer composites (FRGCs) in various areas and highlights their environmentally friendly benefits. It discusses the different types of fiber reinforcements and their role in improving the mechanical performance of FRGCs, as well as the properties of FRGCs in mechanical response and durability.
Proceedings Paper
Polymer Science
Traian Zaharescu, Michelina Catauro, Ignazio Blanco
Summary: Polyhedral Oligomeric Silsesquioxane (POSS)/Ethylene-propylene-diene monomer (EPDM) composites with 3% wt of POSS were prepared at room temperature by evaporating solvent (CHCl3) from the polymer/filler system. The thermal stability of the composites was significantly improved compared to neat EPDM, demonstrating the impact of POSS molecules on degradation rate. Classification among samples at different radiation levels showed the beneficial effect of POSS presence on thermal stability.
MACROMOLECULAR SYMPOSIA
(2021)
Proceedings Paper
Polymer Science
Traian Zaharescu, Tunde Borbath, Ignazio Blanco, Istvan Borbath
Summary: This study investigates the impact of inorganic oxide compounds added as fillers on the durability of alkyd resin used as insulation material in electrical devices. It also discusses the stabilization effects of doping different atoms on the resin's thermal stability.
MACROMOLECULAR SYMPOSIA
(2021)
Proceedings Paper
Polymer Science
Sneha Sama, Ignazio Blanco, G. Crescente, Michelina Catauro
Summary: A simplified model was used to investigate the two-dimensional flow of a non-Newtonian fluid over a cylinder, focusing on the thermophysical properties of the melt elastomer flow with Prandtl variable and internal heat generation. Temperature-dependent physical properties such as velocity, contour temperature, surface temperature, and pressure were considered and discussed, along with examining the energy exchange from the surface to the fluids through the variation in the Rayleigh number.
MACROMOLECULAR SYMPOSIA
(2021)
Proceedings Paper
Polymer Science
Ignazio Blanco, Gianluca Cicala, Claudio Tosto, Giuseppe Recca, Giovanni Dal Poggetto, Michelina Catauro
Summary: This study investigated metakaolin-based geopolymers prepared with different percentages of fly ash, showing that the addition of fly ash can reduce the dehydration rate. A plateau in the properties of geopolymers was observed when the fly ash content exceeded 50%.
MACROMOLECULAR SYMPOSIA
(2021)
Proceedings Paper
Polymer Science
Michelina Catauro, Ignazio Blanco, Roberto De Santis, Teresa Russo, Giuseppina Crescente
Summary: The aim of this study was to synthesize CaO·GeO2 glass nanocomposite powders and investigate their structure using differential thermal analysis, X-ray diffraction, and Fourier Transform Infrared spectroscopy. The main crystallizing phase identified was CaGe2O5 crystals, and the potential antibacterial properties of the materials towards Escherichia coli were preliminarily studied.
MACROMOLECULAR SYMPOSIA
(2021)
Proceedings Paper
Polymer Science
Michelina Catauro, Ignazio Blanco, Daniele Naviglio, Giovanni Dal Poggetto
Summary: The aim of this study was to synthesize Nb-V oxide catalysts by sol-gel method and investigate the catalytic properties in oxidative dehydrogenation of ethane. Samples prepared with higher H2O/V ratio showed improved catalytic performance of vanadium, possibly due to better interaction between vanadium and niobium. Characterization techniques included XRD, atomic absorption, BET analysis, and TG-FTIR spectroscopy.
MACROMOLECULAR SYMPOSIA
(2021)
Proceedings Paper
Materials Science, Multidisciplinary
Michelina Catauro, Federico Barrino, Ignazio Blanco, Giovanni Dal Poggetto, Simona Piccolella, Giuseppina Crescente, Severina Pacifico
Summary: Sol-gel chemistry was used to design new antioxidant biomaterials, incorporating the natural antioxidant compound chlorogenic acid. The hybrids showed strong scavenging capacity towards DPPH and ABTS(+) radicals, with selectivity against tumor cells observed in cytotoxicity tests. These materials may have pro-oxidant effects that interfere selectively with tumor cell growth.
MATERIALS TODAY-PROCEEDINGS
(2021)
Article
Polymer Science
Tetsu Sato, Mariko Takahashi, Takeshi Saito, Masahito Toyonaga, Itsuo Tanuma, Rie Yamada, Satoru Hosoda
Summary: An automatic evaluation system for photooxidation has been developed and successfully applied to assess the photo-OIT of LDPE samples containing photooxidation stabilizers. The system allows independent setting of various measurement conditions and provides detailed information on the photooxidation process.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Zongzheng Zuo, Shuxue Zhou
Summary: In this study, three fluoroalkyl trimethoxysilane (FATMS) additives with different chain lengths were incorporated into a two-component polyurethane clearcoat to improve its hydrophobic durability. The coatings modified with FATMS maintained their surface hydrophobicity under various conditions, but quickly lost it when exposed to both UV irradiation and/or high temperature with water. The results suggest that the FATMS route is more suitable for indoor applications at room temperature.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Song Li, Feng Zhao, Xueya Wang, Zhihua Liu, Jingze Guo, Yutong Li, Shuangmei Tan, Zhenxiang Xin, Shuai Zhao, Lin Li
Summary: Green flame retardants have garnered attention for their environmental friendliness, but current options fall short in achieving high flame retardancy for flammable polymers and maintaining environmental protection. This study takes a two-pronged approach to address flame retardants and the flame-retardant process. An eco-friendly bio-based synergistic flame retardant (PAU), synthesized using phytic acid (PA) and urea (U), is used to create a flame retardant coating that can be directly applied to any surface shape using polydopamine as an adhesive. The resulting EPS-PAU exhibits excellent flame retardancy, smoke suppression, and light weight while only slightly increasing the density.
POLYMER DEGRADATION AND STABILITY
(2024)
