Article
Polymer Science
A. Catalan, A. Martinez, C. Munoz, C. Medina, T. Marzialetti, M. Montano, A. F. Jaramillo, M. F. Melendrez
Summary: The study evaluated the microhardness, microleakage, and degree of conversion of preheated composite resins. The findings suggest that preheating improves the mechanical properties of the resins but also increases the risk of microleakage.
Article
Chemistry, Multidisciplinary
Zhi Wei Loh, Mohd Hafiz Mohd Zaid, Mohd Mustafa Awang Kechik, Yap Wing Fen, Yazid Yaakob, Mohd Zul Hilmi Mayzan, Shahira Liza, Wei Mun Cheong
Summary: This paper outlines the fabrication of bioactive glass derived from waste eggshells as a source of calcium and investigates its properties. The results show that increasing CaF2 content with appropriate P2O5 content can improve the mechanical properties of the bioglass. The bioglass with CaF2/P2O5 ratio of 6/4 exhibits the optimal compressive strength and vickers microhardness.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Polymer Science
Ali Alrahlah, Abdel-Basit Al-Odayni, Waseem Sharaf Saeed, Naaser A. Y. Abduh, Rawaiz Khan, Abdulrahman Alshabib, Faisal Fahad N. Almajhdi, Riad M. Alodeni, Merry Angelyn Tan De Vera
Summary: The aim of this study was to determine the optimal concentration of eugenol (Eg) and eugenyl-glycidyl methacrylate (EgGMA) to achieve the ideal degree of conversion (DC) in resin composites. Two series of experimental composites were prepared, one containing EgGMA and the other containing Eg, ranging from 0-6.8 wt% per resin matrix. The results showed that the DC increased with concentration up to a certain point, and then decreased. Insufficient DC, below the suggested clinical limit (>55%), was observed beyond specific concentration thresholds.
Article
Polymer Science
Asae Ito, Arisa Shin, Koh-hei Nitta
Summary: This study compared the effects of salts with different carbon chain lengths on the uniaxial tensile properties of PMMA. It was found that the salts had a pinning effect on PMMA chains, causing brittle fracture, with LFMS showing a more pronounced effect. Doping with LFMS enhanced ductility while slightly reducing tensile toughness. The rheological behavior at the compression-molding temperature was found to affect the brittle fracture behavior in tension.
Article
Dentistry, Oral Surgery & Medicine
Rong Wang, Yong Li, Viviane Hass, Zhonghua Peng, Yong Wang
Summary: The study found that the novel polymerizable collagen cross-linker MAPA can improve the polymerization rate, hardness, and stability of HEMA-based dental adhesive systems compared to PA. It offers a revolutionary solution for improved bond-strength and longevity of dental restorations.
Article
Polymer Science
Therese Eriksson, Harish Gudla, Yumehiro Manabe, Tomoki Yoneda, Daniel Friesen, Chao Zhang, Yasuhide Inokuma, Daniel Brandell, Jonas Mindemark
Summary: This study compares the properties of solid polymer electrolytes (SPEs) of three different carbonyl-containing polymers. Experimental measurements and molecular dynamics simulations reveal the influence of the polymer structure on ion transport and the possibility of achieving desired transport properties by fine-tuning the polymer chemistry.
Article
Materials Science, Multidisciplinary
Peter Pavol Monka, Katarina Monkova, Martin Vasina, Milena Kubisova, Martin Korol, Adriana Sekerakova
Summary: This article investigates the influence of tool geometry and cutting conditions on the chip characteristics in slow-rate machining of steel. Experimental results and statistical analysis reveal the behavior of temperature and microhardness, allowing the identification of optimal machining conditions.
Article
Polymer Science
E. Parthiban, S. Sudarsan
Summary: A functionally modified methacrylate copolymer was synthesized via free radical polymerization and characterized using various techniques. The copolymer showed promising properties for industrial and medical applications through studies on thermal stability, surface morphology, and molecular characteristics.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Polymer Science
Asae Ito, Arisa Shin, Koh-hei Nitta
Summary: This study investigates the effects of various lithium halides on the rheological and mechanical properties of PMMA. The results show that lithium halides can strongly crosslink with PMMA and alter its flow behavior and mechanical properties. The addition of lithium halides in the PMMA matrix expands the flow zone and increases the brittleness of PMMA solids.
Article
Dentistry, Oral Surgery & Medicine
Omar Abd El-Maksoud, Hamdi Hosni Hamdan Hamama, Ramy Ahmed Wafaie, Noha El-Wassefy, Salah Hasab Mahmoud
Summary: This study aimed to assess the effect of shelf-storage temperature on degree of conversion (DC) and microhardness of three composite restorative materials with different matrix systems. The results showed that refrigeration of resin-composite might have a deleterious effect on DC and microhardness of the tested materials.
Article
Dentistry, Oral Surgery & Medicine
Hyoungseok Ko, Dohyun Kim, Sung-Ho Park
Summary: This study analyzed the effect of the dental curing unit's (DCU) inhomogeneous beam profile on the microhardness distribution of composite resin specimens with different thicknesses. The results showed that the inhomogeneity of the beam profile can be influenced by attenuation conditions, and the effect of the beam profile on different thicknesses and types of composite resin varies.
Article
Polymer Science
In-Hwa Choi, Yoon-Gwan Jeong, Joon-Seop Kim
Summary: This study investigates the relationship between the amount of polar plasticizer glycerol and the glass transition temperature (T-g) and ion content of poly(styrene-Na methacrylate) (PSMANa) ionomers. It is found that the T-g of ion poor matrix regions decreases slightly due to the effect of glycerol on the formation of ionic aggregates. The cluster T-g (T-g,T-c) is influenced by the amount of glycerol, ion content, and phase separation in the ionomer matrix. The results suggest that the T-g,T-c of PSMANa ionomers can be controlled by varying the ion content and glycerol amount.
Article
Polymer Science
Niklas Neumann, Sascha Thinius, Gideon Abels, Andreas Hartwig, Katharina Koschek, Laura Boskamp
Summary: A synthesis approach was investigated for crosslinkable hyperbranched prepolymers with adjustable degrees of methylation and methacrylation, achieving full conversion of hydroxyl groups. The substitution degrees of methacrylate could be adjusted by catalyzed esterification using predefined partially methylated polyglycerol-based precursors. The combination of methacrylic anhydride, triethylamine, and 4-dimethylaminopyridine was proven effective for complete conversion of primary and secondary hydroxyl groups. NMR, IR, and Raman spectroscopy confirmed the insertion of methacrylic crosslinking groups in the polymeric backbone. The photopolymerization of obtained prepolymers resulted in higher crosslink density, stiffness, and glass transition temperature with increasing methacrylate content.
Article
Polymer Science
Dimitrios Selianitis, Stergios Pispas
Summary: This work introduces a series of novel multi-responsive hyperbranched copolymers which self-organize in aqueous media. The copolymers, prepared by RAFT polymerization, exhibit responsiveness to changes in solution temperature and pH, and are able to encapsulate hydrophobic drugs like curcumin. These hyperbranched copolymers show potential as candidates for drug delivery and bio-imaging applications, as they demonstrate stability in the presence of serum proteins.
Article
Materials Science, Ceramics
J. Y. Cho, H. J. Kim, S. H. Jeong, J. H. Kim, M. J. Lee
Summary: In this study, we investigated the physical and optical properties of barium germanium (BaO-GeO2) glass samples with varying BaO concentrations. The results showed that refractive indices, glass transition temperatures, molar volumes, and coefficients of thermal expansion increased with BaO concentration. Raman spectra revealed structural network modifications and typical Germanium glass bands.
CERAMICS INTERNATIONAL
(2023)
Article
Polymer Science
Andrea Granada, Issei Otsuka, Thiago Caon, Marcos Antonio Segatto Silva, Valdir Soldi, Redouane Borsali
JOURNAL OF POLYMER RESEARCH
(2017)
Article
Food Science & Technology
Silvia Maria Martelli, Caroline Motta, Thiago Caon, Josue Alberton, Ismael Casagrande Bellettini, Ana Cristina Pinheiro do Prado, Pedro Luiz Manique Barreto, Valdir Soldi
LWT-FOOD SCIENCE AND TECHNOLOGY
(2017)
Article
Materials Science, Multidisciplinary
Gustavo Cervi, Sergio Henrique Pezzin, Marcia Margarete Meier
MATERIA-RIO DE JANEIRO
(2017)
Article
Dentistry, Oral Surgery & Medicine
Marcela C. Rodrigues, Marina D. S. Chiari, Yvette Alania, Livia C. Natale, Victor E. Arana-Chavez, Marcia M. Meier, Victoria S. Fadel, Flavio M. Vichi, Thiago L. R. Hewer, Roberto R. Braga
Article
Engineering, Biomedical
Karina Kato Carneiro, Taylan Pinheiro Araujo, Edilausson Moreno Carvalho, Marcia Margarete Meier, Auro Tanaka, Ceci Nunes Carvalho, Jose Bauer
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2018)
Article
Engineering, Biomedical
Livia C. Natale, Marcela C. Rodrigues, Yvette Alania, Marina D. S. Chiari, Handially S. Vilela, Douglas N. Vieira, Victor Arana-Chavez, Marcia M. Meier, Flavio M. Vichi, Roberto R. Braga
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Sara Ferreira da Costa, Angela Graziela Lechinski da Luz de Andrade, Marcia Margarete Meier, Sergio Henrique Pezzin
MATERIA-RIO DE JANEIRO
(2018)
Article
Polymer Science
Wanessa R. K. Weihermann, Marcia M. Meier, Sergio H. Pezzin
JOURNAL OF APPLIED POLYMER SCIENCE
(2019)
Article
Biochemistry & Molecular Biology
Barbara Sanay Inoue, Sandriele Streit, Andrea Lima dos Santos Schneider, Marcia Margarete Meier
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2020)
Article
Engineering, Biomedical
Olinto Santos Cardoso, Marcia Margarete Meier, Edilausson Moreno Carvalho, Paulo Vitor Campos Ferreira, Giulio Gavini, Patricia Maria Wiziack Zago, Renata Grazziotin-Soares, Alan Silva de Menezes, Ceci Nunes Carvalho, Jose Bauer
Summary: This study evaluated the influence of adding bioactive glass particles into endodontic cements, finding that the incorporation of NbG or 45S5 can neutralize acidic environments and induce the formation of hydroxyapatite precursors, potentially providing bactericidal effects and promoting tissue healing.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2022)
Article
Engineering, Biomedical
Rogerio Aparecido Gariani, Felipe Wodtke, Fabrine Gaedke Boll, Fernando Roberto Xavier, Marcia Margarete Meier
Summary: This study proposes the synthesis of methacrylate resveratrol and phenolphthalein monomers to generate copolymers, and analyzes their key characteristics on the chemical structure-property perspective. The findings contribute to better understand the effect of monomer chemical structures on physicochemical properties of copolymers.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Tatiane Michele Popiolski, Markus Wilimzig, Valdir Soldi
Summary: This study evaluated the antibacterial activity of textile fibers containing nanoparticles and essential oils, showing potential effectiveness against Staphylococcus aureus. The composition of nanoparticles, including morphology, encapsulation efficiency, and release kinetics, as well as the arrangement of fibers in textiles, all play a role in determining antibacterial activity.
MATERIA-RIO DE JANEIRO
(2021)
Article
Chemistry, Multidisciplinary
Mariele P. Sanches, Idejan P. Gross, Rodrigo H. Saatkamp, Alexandre L. Parize, Valdir Soldi
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2020)
Article
Materials Science, Multidisciplinary
Stefani Regina Zibetti Teixeira, Emily Marques dos Reis, Giannini Pasiznick Apati, Marcia Margarete Meier, Andre Lourenco Nogueira, Michele Cristina Formolo Garcia, Andrea Lima dos Santos Schneider, Ana Paula Testa Pezzin, Luismar Marques Porto
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2019)
Article
Chemistry, Multidisciplinary
Michel Vinicius Flach, Ellen Seibt, Eduardo Luis Schneider, Viviane de Lima, Valdir Soldi, Luiz Carlos Robinson, Liane Bianchin, Vanusca Dalosto Jahno
REVISTA VIRTUAL DE QUIMICA
(2017)
