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)
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
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
Neel J. Shah, Sajjad Dadashi-Silab, Michael D. Galluzzo, Saheli Chakraborty, Whitney S. Loo, Krzysztof Matyjaszewski, Nitash P. Balsara
Summary: The study investigated the impact of salt addition on a diblock copolymer system with a negative Flory-Huggins interaction parameter, chi. It was found that ordered phases only appear under specific conditions, as predicted by ionic self-consistent field theory.
Article
Thermodynamics
Jianying Ma, Chunlei Cao
Summary: Ionic liquids (ILs) have been widely used as solvents for organic synthesis, but their applications in polymer synthesis are still limited. This study investigates the use of ILs in copolymerization and shows that copolymerizing ILs can significantly improve the thermal stability of copolymers. The results indicate that copolymers with ILs have higher thermal stability and thermal oxidative stability compared to homopolymers.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Engineering, Biomedical
Bin Yang, Shari Ginsburg, Wei Li, Marina Moscardini Vilela, Mina Shahmohammadi, Christos G. Takoudis, Christine D. Wu
Summary: This study aimed to improve the surface properties of PMMA using nano-ceramic coatings and assess microbial adherence after long-term use of a chemical cleanser. The results showed that the TiO2/ZrO2-coated PMMA had significantly less C. albicans attachment than the uncoated PMMA and TiO2-coated samples. The nano-ceramic coating altered the surface properties of the PMMA and reduced oral microbial adhesion, suggesting its promising alternative as a disinfection method for PMMA denture materials.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
(2023)
Article
Polymer Science
Murugesan Ramachandran, Rengapillai Subadevi, Palanisamy Rajkumar, Rajendran Muthupradeepa, Marimuthu Sivakumar
Summary: Spherical zirconium oxide (ZrO2) filler is synthesized successfully using co-precipitation technique, and is incorporated into a polymer system as an electrolyte for studying its ionic conducting behavior. The results show that, under optimal conditions, the electrolyte exhibits high conductivity for ion transportation.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
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
Andres Cardil, Miguel Palenzuela, Juan F. Vega, Marta E. G. Mosquera
Summary: A recent study has successfully produced nano-sized macromolecular assemblies through a combined polymerization process of glycidyl methacrylate mediated by aluminum complexes. The morphological features and rheological properties of these novel nanoassemblies were investigated. The study revealed that the nanoparticles exhibited a thin disk shape on a flat surface, and their rheological behavior resembled that of un-entangled polymers.
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
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
Materials Science, Composites
Zeynep Iyigundogdu
Summary: This study investigated the use of graphene nanoplatelets (GnP) as reinforcing material for thermoplastic polymer matrices, as well as an antimicrobial and fire-retardant agent. Different PMMA-ZnB and PMMA-GnP-ZnB composite films were fabricated with different concentrations of ZnB, and the effects on antimicrobial activity, thermal and mechanical properties, and surface morphologies were studied.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Multidisciplinary
Po-Ying Huang, Yulin Zhang, Hao Ouyang, Fuqian Yang, Sanboh Lee
Summary: The study investigated the photo-stability of polylactide-poly(methyl methacrylate) blends after UV irradiation. It was found that UV irradiation decreases the crystallization temperature of PLA and demonstrates the interaction between the materials. The combination effect of UV irradiation and the interaction between PLA and PMMA determines the photo-stability of the blends.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
