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
Biochemistry & Molecular Biology
Aleksandra Wypych-Puszkarz, Onur Cetinkaya, Jiajun Yan, Ruslana Udovytska, Jaroslaw Jung, Jacek Jenczyk, Grzegorz Nowaczyk, Stefan Jurga, Jacek Ulanski, Krzysztof Matyjaszewski, Joanna Pietrasik, Marcin Kozanecki
Summary: Core-shell nanocomposites consisting of barium titanate nanocrystals grafted onto poly(methyl methacrylate) chains were prepared. The nanocomposites exhibited enhanced dielectric permittivity and improved thermal stability. The presence of ceramic nanoparticles affected the molecular dynamics and structure of the polymer chains.
Article
Materials Science, Multidisciplinary
Ismael Sanchez-Calderon, Victoria Bernardo, Judith Martin-de-Leon, Miguel Angel Rodriguez-Perez
Summary: Finding new materials with enhanced thermal insulation properties has become crucial in reducing energy consumption and CO2 emissions. This study measured the thermal conductivity of low-density microcellular and nanocellular polymers and analyzed the different heat transfer mechanisms involved. A semi-empirical model was developed to predict the thermal conductivity and the contribution of each heat transfer mechanism.
MATERIALS & DESIGN
(2022)
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
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
Yafei Gao, Jianmin Zhang, Jia Liang, Dongming Yuan, Weizhen Zhao
Summary: This paper reviews the preparation methods and functionalization strategies of Poly(methyl methacrylate) (PMMA) microspheres, as well as introduces its wide applications and future development trends.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Marta Worzakowska
Summary: Polymer materials were synthesized through UV polymerization of citronellyl methacrylate and benzyl methacrylate with different compositions, resulting in novel environmentally friendly copolymers. These copolymers exhibited high conversion of double bonds and were highly resistant to solvents. The glass transition temperature confirmed their elastomeric nature at room temperature. The thermal stability of the copolymers depended on their composition, and their decomposition occurred mainly through depolymerization and bond breaking.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Olimpia Crispim da Silveira, Alisson Mendes Rodrigues, Maziar Montazerian, Helio de Lucena Lira, Francesco Baino, Romualdo Rodrigues Menezes
Summary: The research investigated the potential application of combining polymers and ceramics in dental composites, preparing composites with superior mechanical properties using casting and infiltration techniques, suitable for dental crowns and fixed partial prostheses.
APPLIED SCIENCES-BASEL
(2021)
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
Fatoumata Ide Seyni, Lawrence Barrett, Steven Crossley, Brian P. Grady
Summary: The use of carbon nanotubes with varying chemistry (diblock nanotubes) at the PS/PMMA interface can increase fracture toughness, while single-chemistry nanotubes do not have a reinforcing effect. However, the presence of agglomerates of carbon nanotubes may limit their effectiveness in toughening the interface.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Polymer Science
Pietro Mingarelli, Chiara Romeo, Emanuela Callone, Giulia Fredi, Andrea Dorigato, Massimiliano D'Arienzo, Francesco Parrino, Sandra Dire
Summary: This study utilized ladder-like silsesquioxanes to produce composites with remarkable thermal conductivity. The addition of functionalized nanoparticles and blending with polybutadiene proved to be effective strategies for incorporating a higher ceramic filler amount and increasing thermal conductivity.
Article
Polymer Science
Elisa Guazzelli, Matteo Oliva, Carlo Pretti, Gianfranca Monni, Armand Fahs, Christine Bressy, Elisa Martinelli
Summary: Hydrolyzable block copolymers consisting of polyethylene glycol and poly(trialkylsilyl methacrylate-co-methyl methacrylate) were synthesized and their hydrolysis performance and erosion behavior in artificial seawater were studied. The results showed that the copolymer film surfaces could respond to the water environment and demonstrated antifouling behavior against diatoms.
Article
Chemistry, Physical
ShiWei Xie, Dong Wang, Sa Zhang, JianHua Xu, JiaJun Fu
Summary: This article describes a catalyst-free and efficient method for preparing high performance PMMA through hindered urea bond (HUB) crosslinking strategies. The HUB crosslinked PMMA exhibits improved mechanical properties, including increased Young's modulus, tensile strength, strain at break, and toughness. It also shows excellent solvent resistance, high temperature creep resistance, and the ability to be recycled and repaired.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Polymer Science
Andrei A. Korigodskii, Artem E. Zhirnov, Alexander S. Kechekyan, Sergey B. Zezin
Summary: Polymer blends obtained by polymerization of methyl methacrylate in the presence of poly(propylene glycol) were investigated. Poly(propylene glycol) acts as a plasticizer, significantly affecting the properties of the material. The addition of poly(propylene glycol) allows for easy control of the properties of poly(methyl methacrylate) within a wide range.
Article
Polymer Science
Navid Chapman, Mingyu Chapman, William B. Euler
Summary: The morphology of sub-micron poly(methyl methacrylate) films coated onto glass supports by spin coating from toluene was investigated, revealing wrinkled surfaces with local quasi-sinusoidal periodicity on films thicker than 75 nm. The surface wrinkles, attributed to convective instabilities, had large aspect ratios with wavelengths in the tens of microns and amplitudes in the tens of nanometers. The study also explored the effects of film thickness, coating solution concentration, and drying rate on the thin film surface morphology.
