Article
Polymer Science
Nikolaos Politakos, Ioannis Moutsios, Gkreti-Maria Manesi, Dimitrios Moschovas, Ainur F. Abukaev, Evgeniia A. Nikitina, Galder Kortaberria, Dimitri A. Ivanov, Apostolos Avgeropoulos
Summary: Novel hybrid materials of the PB-b-P(o-Bn-L-Tyr) and PI-b-P(o-Bn-L-Tyr) type were synthesized under high-vacuum techniques and molecularly characterized to confirm successful synthesis and structure content. The study investigated the behavior of polypeptide segments and their influence on thermal properties, such as glass transition temperatures and thermal stability, in the biobased hybrid copolymers. Morphologies in thin films showed the formation of polypeptide fibrils in the polydiene matrix, as observed through atomic force microscopy (AFM).
Article
Polymer Science
Jialin Qiu, Xuejian Chen, Amy N. Le, Carlos R. Lopez-Barron, Brian J. Rohde, Ronald P. White, Jane E. G. Lipson, Ramanan Krishnamoorti, Megan L. Robertson
Summary: Thermodynamic interactions were studied in blends of melts containing 1,4-polyisoprene (1,4-PI) and copolymers of 1,2-polybutadiene (1,2-PBD), poly(ethyl ethylene) (PEE), and/or polyethylene (PE) units. The Flory-Huggins interaction parameter, chi, was measured using small angle neutron scattering (SANS), and the data were analyzed through different models to understand the behavior. Random copolymer theory (RCT) successfully described the behavior in 1,2-PBD-co-PEE/1,4-PI blends, but failed in PE-co-PEE/1,4-PI blends. The locally correlated lattice model showed promise in describing the phase behavior of PE-co-PEE/1,4-PI blends.
Article
Polymer Science
Shuqing Wu, Qipeng Xiong, Xiaoqi Li, Dapeng Chen, Binbin Liu
Summary: The addition of PPy-coated Al2O3 enhances the interfacial compatibility of composites but lowers the cross-linking density, affecting the mechanical properties. Improving the interfacial compatibility and decreasing the cross-linking density can enhance processing performance and filler loading capacity, which benefits increasing thermal conductivity and maintaining strength. Utilizing functionalized fillers by admicellar polymerization not only improves interfacial compatibility but also expands the functions of composites, with great significance for future applications in various industries.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Composites
Mingming Sheng, Jincheng Yu, Hongyu Gong, Yujun Zhang, Ying Wang
Summary: Silicone rubber matrix composites with boron nitride reinforcement showed improved thermal stability and mechanical properties. The influence of boron nitride content and phenyl content on the performance of the composites was studied. The results indicated that the addition of boron nitride enhanced the thermal stability and mechanical properties, regardless of the phenyl content in the matrix.
COMPOSITES COMMUNICATIONS
(2022)
Article
Mechanics
R. Kadri, M. Nait Abdelaziz, B. Fayolle, M. Ben Hassine, J. F. Witz
Summary: This study examines the impact of aging on mechanical properties of rubber materials, with modifications to the rubber network structure through crosslinking and chain scission mechanisms. A predictive mechanical tool based on an hyperelastic constitutive model coupled with physical-chemical parameters was proposed to estimate mechanical properties. Relevant indicators of damage for crosslinking or chain scission processes, such as elastically active chains concentrations and swelling rate, were introduced as damage parameters in the mechanical modeling, leading to satisfactory predictions of mechanical behavior and stress-strain estimates at break.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Farhad Asempour, Milan Maric
Summary: We have developed a bio-derived vitrimeric rubber with weldability and excellent reprocessability. The rubber was created through reversible-deactivation radical copolymerization and a single-step cross-linking treatment. The resulting vitrimers exhibited a wide range of mechanical and rheological properties, including variable glass transition temperature and elongation stress. Furthermore, the addition of static cross-links improved the creep resistance and shape memory effects of the rubber. This research provides a cost-effective and versatile method for the development of recyclable biobased rubbers.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Ceren Ince, Bassel Mahmoud Hassan Shehata, Shahram Derogar, Richard J. Ball
Summary: This study examines the effectiveness of sodium hydroxide treatment for waste rubber and the utilization of silica fume to enhance the interfacial transition zone between rubber and cement matrix, showing significant implications for the long-term physical and mechanical properties of concrete.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Materials Science, Multidisciplinary
Chunwei Leng, Dahua Ren, Liang Zhang
Summary: The thermoelectric performances of pure silicene and hydrogenated silicene were investigated in this study. It was found that hydrogenation can modify the band structures, decrease the electrical and thermal conductivity, and increase the absolute values of the Seebeck coefficient of silicenes, resulting in a high thermoelectric figure of merit (ZT) for hydrogenated silicene.
RESULTS IN PHYSICS
(2022)
Article
Thermodynamics
Shuming Dai, Ping Song, Ziyue Jiao, Yi Cheng, Jingzhao Shang, Xuefei Leng, Zhiyong Wei, Yang Li
Summary: A series of bisphenol A-based polyarylates were synthesized and the effect of end group structure on polymer properties was investigated. The addition of a capping agent improved the thermal properties and light transmission of the polymers. Furthermore, the thermal degradation mechanism of the polyarylates was studied.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Chemistry, Physical
Yong-Chao Wu, Jian-Li Shao, Zhuoqun Zheng, Haifei Zhan
Summary: The mechanical properties of a single-layer diamond-diamane under tensile and bending deformation were investigated through atomistic simulations. The stacking sequence had negligible influence, with fracture mainly occurring along the zigzag direction. Young's modulus and fracture strain/strength decrease with increasing temperature, and their relationship can be described by the kinetic fracture theory. Additionally, diamane exhibits high bending stiffness, around 3600 eV A, establishing a fundamental understanding for its usage in advanced nanodevices.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Sofia S. Filippova, Konstantin V. Deriabin, Igor Perevyazko, Olga V. Shamova, Dmitriy S. Orlov, Regina M. Islamova
Summary: Metal- and peroxide-free silicone rubbers were synthesized via a reaction between amino-containing poly(dimethylsiloxanes) and iodine-containing polysiloxanes. The equimolar ratio of NH2 groups to the I-containing moiety (1:1) showed the highest cross-linking density. The obtained silicone rubbers exhibited antibacterial activity against Escherichia coli and Staphylococcus aureus, making them suitable for applications in biomedicine and the food industry as antibacterial coatings and materials.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Applied
Xing Fan, Mengdi Sun, Zhong Li, Zhenhua Chen, Xiaoyong Zhou, Quanxuan Lu, Zhicheng Zhang
Summary: With the increasing attention in the biomedical field and intelligent wearable devices, flexible piezoelectric materials, such as polyvinylidene fluoride (PVDF)-based polymers, have shown a broad potential in the field of sensors. However, the existing materials are expensive and difficult to process, hindering their commercial application. This study focuses on the poly(vinylidene fluoride-tetrafluoroethylene) (P(VDF-TFE), F24) copolymers due to their low cost and great potential in the piezoelectric field. The researchers systematically investigated the structure and dielectric properties of P(VDF-TFE) copolymers with different TFE contents, and explored the effect of thermal annealing on their piezoelectric performances. The results showed that the sample F24-20A130 exhibited the best piezoelectric properties, with a piezoelectric stress constant (d33) of -20 pC/N. This sample also demonstrated excellent response sensitivity in sensing tests, making it a promising material for flexible sensor applications in healthcare and wearable devices.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Materials Science, Multidisciplinary
Paulina Rudzinska, Jakub Wawrzyniak, Katarzyna Grochowska, Jakub Karczewski, Jacek Ryl, Katarzyna Siuzdak
Summary: To meet the increasing global demand for clean electricity, affordable and efficient photoactive semiconductors are constantly being developed. A one-step calcination method combined with hydrogenation has been investigated as an alternative to the time-consuming furnace annealing for crystallization and modification of high-surface titania nanotubes. The evaluation of the crystallinity of the electrode based on Raman and X-ray diffraction, followed by optical and electrochemical investigation, revealed significantly improved performance of the modified material, including over 2.6-fold higher photocurrent densities and enhanced visible light absorption.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Bram B. C. Peters, Jia Zheng, Suppachai Krajangsri, Pher G. Andersson
Summary: This study reveals a novel reactivity of Crabtree-type complexes in the Ir-N,P-catalyzed hydrogenation of enones by adding benzamide and developing a reactive catalyst, resulting in a highly stereoselective reduction of enones.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Xianghong Ge, Hui Liu, Xingxing Ding, Yanyan Liu, Xingsheng Li, Xianli Wu, Baojun Li
Summary: This study successfully fabricated Ru@CNT composite microsponge using supercritical CO2, achieving the selective anchoring of metal nanoparticles into the internal space of carbon nanotubes. The catalytic activity of Ru@CNTs was found to be significantly influenced by the catalyst preparation temperature, hydrogenation temperature, and time.
Article
Polymer Science
Marcus Vinicius Braum, Marly Antonia Maldaner Jacobi
POLIMEROS-CIENCIA E TECNOLOGIA
(2016)
Article
Materials Science, Composites
Jordao Gheller, Italo Ribeiro de Barros, Marly Maldaner Jacobi
PLASTICS RUBBER AND COMPOSITES
(2017)
Article
Polymer Science
Marcus V. Braum, Marly A. M. Jacobi
RUBBER CHEMISTRY AND TECHNOLOGY
(2017)
Article
Polymer Science
Muhammad Nisar, Pascal S. Thue, Cesar A. Heck, J. L. Salazar Cuaila, J. Geshev, Eder C. Lima, Marly M. Jacobi, Griselda Barrera Galland
EUROPEAN POLYMER JOURNAL
(2018)
Article
Polymer Science
Vinicius Demetrio da Silva, Marly Maldaner Jacobi, Henri Stephan Schrekker, Sandro Campos Amico
JOURNAL OF APPLIED POLYMER SCIENCE
(2018)
Article
Polymer Science
Edson L. Francisquetti, Vinicios Pistor, Rudinei Fiorio, Mara Z. Andrade, Ademir J. Zattera, Marly A. M. Jacobi
JOURNAL OF APPLIED POLYMER SCIENCE
(2013)
Article
Multidisciplinary Sciences
Gislene L. Goncalves, Renan Maestri, Gilson R. P. Moreira, Marly A. M. Jacobi, Thales R. O. Freitas, Hopi E. Hoekstra
Article
Polymer Science
Vinicius Demetrio da Silva, Marly Maldaner Jacobi, Henri Stephan Schrekker, Sandro Campos Amico
Article
Polymer Science
Marcus Braum, Marly A. M. Jacobi
RUBBER CHEMISTRY AND TECHNOLOGY
(2019)
Article
Engineering, Chemical
Felipe G. Ornaghi, Otavio Bianchi, Heitor L. Ornaghi, Marly A. M. Jacobi
POLYMER ENGINEERING AND SCIENCE
(2019)
Article
Polymer Science
Vinicius Demetrio da Silva, Italo Ribeiro de Barros, Debora K. Silva da Conceicao, Kauana Nunes de Almeida, Henri Stephan Schrekker, Sandro C. Amico, Marly M. Jacobi
JOURNAL OF APPLIED POLYMER SCIENCE
(2020)
Article
Materials Science, Composites
Felipe Gustavo Ornaghi, Heitor Luiz Ornaghi, Jordao Gheller, Marly Antonia Maldaner Jacobi
Summary: This study focused on manufacturing novel fluorinated rubber composites with carbon nanofibers and compared them to carbon nanotubes and standard control formulations. It was found that there is a synergistic effect between the nanofillers, providing reinforcement and electrical conductivity. Carbon nanofibers were identified as a cost-effective alternative to carbon nanotubes, with easier chemical modification.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Giovani Pavoski, Renan Kalikoski, Gustavo Souza, Daniel Baldisserotto, Luis Fernando W. Brum, Cristiane dos Santos, Carlos Bergmann, Adriano Brandelli, Marly Jacobi, Griselda Galland
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2020)
Proceedings Paper
Physics, Applied
J. Gheller, M. M. Jacobi
PROCEEDINGS OF PPS-29: THE 29TH INTERNATIONAL CONFERENCE OF THE POLYMER - CONFERENCE PAPERS
(2014)
Article
Polymer Science
Patricia Alves da Silva, Marly Antonia Maldaner Jacobi, Kelly Silva dos Santos, Ricardo Vinicius Bof de Oliveira, Raquel Santos Mauler, Ronilson Vasconcelos Barbosa
POLIMEROS-CIENCIA E TECNOLOGIA
(2014)
