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, Applied
Hanyu Wen, Yu- Hsu, Taka-Aki Asoh, Hiroshi Uyama
Summary: This study focuses on the application of bio-based materials in the synthesis of functional films, and demonstrates that the PEtOx-GA-PEI-S functional film is a promising material for biomedical anti-fouling applications.
PROGRESS IN ORGANIC COATINGS
(2022)
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
Chemistry, Multidisciplinary
Kevin Linberg, Franziska Emmerling, Adam A. L. Michalchuk
Summary: Time-resolved in situ X-ray diffraction has revolutionized the study of mechanochemical transformations, but using poly(methyl methacrylate) jars can significantly alter the kinetics of mechanochemical polymorphism, necessitating a better understanding of these effects.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Biochemistry & Molecular Biology
Barbara Seifert, Stefan Baudis, Christian Wischke
Summary: This study investigates the effect of nanoparticle composition on protein adsorption. The results show that an increased content of hydrophobic polymer molecules in the nanoparticles enhances protein binding, despite the particles having negatively charged surfaces. This study provides a method for controlling protein binding.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
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
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
Engineering, Civil
A. Galgano, C. Di Blasi
Summary: This paper proposes a one-dimensional solid-gas model for the spontaneous and piloted ignition of poly(methyl methacrylate) under thermal irradiance. The mathematical description of the igniter (electrical spark) is given special attention. Three different approaches for describing the heating spark are presented, including direct heating, indirect heating, and pre-ignition combustion. An iterative solution method is also implemented to improve the accuracy of the predictions. The chemical spark model is found to be the simplest and most effective approach for providing predictions in agreement with literature measurements.
FIRE SAFETY JOURNAL
(2022)
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
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)
Article
Chemistry, Multidisciplinary
J. James, G. Thomas, D. Rouxel, M. Strankowski, N. Kalarikkal, S. Thomas
Summary: This study presents a standard set of interpenetrating polymeric networks (IPNs) using elastomer-styrene butadiene rubber and thermoplastic poly(methyl methacrylate) through sequential polymerization protocol, aiming to develop a low-cost toughened plastic with cocontinuous morphology. Different morphological protocols and theoretical models, such as the Davies model, are employed to investigate the mechanical properties and thermal stability of IPNs, providing a platform for the synthesis of low-cost toughened plastic.
MATERIALS TODAY CHEMISTRY
(2021)
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, Physical
Tejas Sharma, Burak Gultekin, Pawan Singh Dhapola, N. G. Sahoo, Sushant Kumar, Daksh Agarwal, H. K. Jun, Diksha Singh, Gaurav Nath, Pramod K. Singh, Abhimanyu Singh
Summary: A polymer electrolyte based on PMMA doped with IL was synthesized using solution cast method. The addition of IL increased the ionic conductivity and conductivity maximum. Various characterization techniques were used to analyze the properties of the developed IL-doped polymer electrolyte films. The optimized electrolyte was used in the fabrication of a supercapacitor and a dye-sensitized solar cell, showing good electrochemical performance.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Chemical
Haifeng Zhang, Chungang Dong, Xiangyan Han, Yuanyuan Han, Fengyang Zhao, Nan Yan, Yuexin Hu, Guiyan Zhao
Summary: Poly(butyleneadipate-co-terephthalate) (PBAT) was used to toughen poly(lactic acid) (PLA) with the addition of poly(methyl methacrylate)-poly(butyl acrylate)-poly(methyl methacrylate) (MAM) through melt blending. The impact toughness and tensile toughness of the PLA/PBAT/MAM ternary blends were greatly enhanced when the MAM content was higher than 5%. The synergistic toughening effect of MAM and PBAT on PLA was observed, improving the compatibility and interfacial adhesion between PLA and PBAT, thus significantly enhancing the overall mechanical properties of PLA blends.
POLYMER ENGINEERING AND SCIENCE
(2022)