Article
Polymer Science
Olya Stoilova, Nevena Manolova, Iliya Rashkov
Summary: The electrospinning technique was successfully used for the fabrication of PMMA fibers loaded with TiO2, allowing for tailored designs and properties by adjusting material ratios and processing conditions. Incorporating TiO2 affected the morphology and properties of the composites, with the inorganic photocatalyst influencing surface characteristics. Moreover, the PMMA/TiO2 composites exhibited promising photocatalytic efficiency for future water treatment membrane applications.
Article
Chemistry, Physical
Yasmin J. Dias, Suman Sinha-Ray, Behnam Pourdeyhimi, Alexander L. Yarin
Summary: Electrospun Poly (methyl methacrylate) fibrous nonwovens containing Methocel A15 LV were fabricated to accelerate the release of Chicago Sky Blue (CSB) for therapeutic purposes. The release rate and amount of CSB released were affected by various factors, leading to intriguing oscillations and the appearance of a new fluorescence peak.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Polymer Science
Jun Zhong, Xinyue Zhang, Xiaofeng Yu, Xuanyu Shi, Shihao Sun, Li Yang, Min Zuo, Yihu Song, Qiang Zheng
Summary: The selective distribution of silica nanoparticles grafted with crosslinked PMMA in PMMA/SAN blend was studied. Highly crosslinked PMMA chains mainly located in the PMMA-rich domains, while linear PMMA chains mainly located at the blend matrix interface. NPs grafted with slightly crosslinked chains were partially located at the interface and partially in the PMMA-rich domains. The deviation between theoretical prediction and actual location of modified NPs may be related to the heterogeneity of miniemulsion polymerization. The different locations of modified NPs induced by different grafted chain structures can result in various compatibilization effects on PMMA/SAN blend.
Article
Chemistry, Analytical
Michele Ciulla, Valentino Canale, Rafal D. Wolicki, Serena Pilato, Pantaleone Bruni, Stefania Ferrari, Gabriella Siani, Antonella Fontana, Pietro Di Profio
Summary: Poly(methyl methacrylate) (PMMA) can effectively capture CO2 under mild conditions, and its capture performance can be improved by electrospinning which increases surface/volume ratio. The modified electrospun PMMAs (ePMMAs) exhibit higher kinetics and capture yields compared to powdery amorphous PMMA (pPMMA). The ePMMAs show good durability with only 5% yield loss after ten consecutive runs. Spent ePMMAs can be regenerated through melting and electrospinning and retain their capture performance. This study demonstrates that electrospun PMMAs have the potential to be used as solid sorbents for carbon capture.
Article
Materials Science, Multidisciplinary
Iouliana Chrysafi, Kyriakos Avraam, Theodora Krasia-Christoforou
Summary: In this study, polyethylene oxide/poly (methyl methacrylate) electrospun fibers were used as encapsulation matrices for phase change materials. The effect of n-eicosane content on the morphology and thermal properties of the fibers was extensively investigated. It was found that the addition of n-eicosane improved the thermal reliability of the fibers, and the system with 10% n-eicosane showed the most promising results. The degradation kinetics of n-eicosane were also studied.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Alireza Farazin, Alireza Shakeri, Hossein Mahdavi
Summary: In this study, an amphiphilic block copolymer suitable for modification of forward osmosis (FO) membrane support layers was synthesized using the ATRP method. The addition of this copolymer significantly improved the performance of the support layer, and the best performing membrane exhibited satisfactory FO performance.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Princy Philip, Tomlal Jose, Ison V. Vanchippurackal
Summary: The present work investigates the host matrix nature of pure and structurally modified PMMA nanofibers with PbS quantum dots, showing that coaxial hollow PMMA nanofibers are the best host matrix. Quantum dots enhance the optical properties of the nanofibers and improve the efficiency of methylene blue dye degradation.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Oleksandr Romanenko, Petr Slepicka, Ondrej Kvitek, Miroslav Slouf, Pavel Nemecek, Vladimir Havranek, Anna Mackova, Vaclav Svorcik
Summary: It has been shown that a radiation-sensitive polymer such as PMMA can be combined with metal nanoparticles through proton irradiation without additional treatment to form a flexible nanocomposite. The concentration of the generated nanoparticles depends on both the primary Au-atom concentration in the PMMA matrix and the proton irradiation fluence used.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Polymer Science
Xinyue Zhang, Haimo Zhang, Min Zuo, Jun Zhong, Xuanyu Shi, Shihao Sun, Li Yang, Yihu Song, Qiang Zheng
Summary: The effect of selective distribution and migration behavior of two types of modified nanoclays on the phase behavior of PMMA/SAN blends is investigated. The different grafting density and chain lengths result in different initial locations and subsequent migration behaviors of the nanoclays. The dense and short chain nanosheets are distributed at the interfacial region and form percolation networks, significantly blocking the concentration fluctuation and domain coarsening. The sparse and long chain nanosheets are initially distributed in the SAN-rich domains and slowly migrate to the interfacial region, inhibiting phase separation and stabilizing the morphology.
Article
Polymer Science
Hyeyoung Park, Martin Wiesing, Philipp Zimmermann, Andreas Janke, Simona Schwarz, Jurgen Nagel
Summary: This article investigates a new approach for functionalizing a surface by using a conventional laser to generate chemical activation. By optimizing laser parameters, poly(ethyleneimine) (PEI) was successfully grafted onto poly(methyl methacrylate) (PMMA) and the modified surface was characterized and analyzed.
Article
Polymer Science
Hamza Mahmoud Aboelanin, Stepan Podzimek, Vladimir Spacek
Summary: This study focuses on the detailed characterization of the molecular structure and dilute solution properties of highly dense star-like polymers of poly(methyl methacrylate) and poly(n-butyl methacrylate). The comparison of refractive index increment with corresponding linear homopolymers was conducted. The prepared polymers were characterized using size exclusion chromatography, multi-angle light scattering detector, and online viscometer. The obtained data allowed for the determination of arm distribution, average number of arms per molecule, and molar mass dependency of the draining factor. The relation between the number of arms per molecule and molar mass was estimated and compared with true values.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Yu-Liang Lin, Song-Yu Tsai, Hung-Chieh He, Lin-Ruei Lee, Jhih-Hao Ho, Chien-Lung Wang, Jiun-Tai Chen
Summary: This study fabricated sc-PMMA nanorods using various pore sizes AAO templates to investigate its crystallization behavior under nanoconfinement. The results show that the crystallization kinetics of sc-PMMA inside nanopores differs significantly from the bulk state, and the preferred orientation of sc-PMMA crystallites is mainly influenced by the degree of spatial confinement and the polymer molecular weight. This work provides a deeper understanding of sc-PMMA under nanoconfinement and offers opportunities for the applications of supramolecular nanostructures in miniaturized devices.
Article
Chemistry, Multidisciplinary
Glendimar Molero, Cong Liu, Zewen Zhu, Qihui Chen, Suzanne R. Peterson, Pavan Kolluru, Hung-Jue Sue, Shuntaro Uenuma, Koichi Mayumi, Kohzo Ito
Summary: The fracture behavior of polyrotaxane (PR)-modified poly(methyl methacrylate) (PMMA) was investigated. By adding only 1 wt % of PR to the PMMA matrix, substantial improvement in fracture toughness was achieved while maintaining modulus and transparency. The interaction between PR and PMMA contributes to higher molecular mobility and enhanced molecular cooperativity, leading to the formation of massive crazing and improved fracture toughness.
Article
Chemistry, Multidisciplinary
Yasuhito Suzuki, Shodai Onozato, Yuya Shinagawa, Akikazu Matsumoto
Summary: It has been demonstrated that nano- or micro-structured polymeric materials have huge potential as advanced materials. However, most of the current fabricating methods have limitations either in cost or in size. In this study, the bulk polymerization of methyl methacrylate in the presence of poly(ethylene glycol) (PEG) was investigated. It was found that phase separation occurs during bulk polymerization, and the resulting microscopic structures of poly(methyl methacrylate) can be controlled by the amount of PEG and the reaction temperature. The addition of PEG also significantly affects the reaction kinetics, leading to a shorter reaction time.
Article
Materials Science, Multidisciplinary
Gnana Saurya Vankayalapati, Ethan Kaplan, Lisa M. Lallo, Nikhil Victor, Craig M. Clemons, John M. Considine, Kevin T. Turner
Summary: Cellulose nanofibrils (CNFs) show promise as reinforcements for polymer fibers, enhancing their strength, stiffness, and fracture toughness. Composite fibers of Poly(methyl methacrylate) (PMMA) and CNFs with varied CNF content were successfully fabricated, leading to significant improvements in mechanical properties. The addition of low-weight fractions of CNFs resulted in increased Young's modulus, yield strength, and fracture toughness in the composite fibers.
ACS APPLIED POLYMER MATERIALS
(2021)
