Article
Polymer Science
Heather S. C. Hamilton, Cornelia Meissner, Todd Emrick, Laura C. Bradley
Summary: A one-step dispersion copolymerization technique is used to fabricate biphasic particles with complex morphology. The study shows that the particle morphology can be transformed by washing the particles with water. The copolymerization process can be controlled by the solubility profile of the monomers, resulting in phase-separated particle morphology.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Alessandra Partenope, Fabio Pizzetti, Valeria Vanoli, Mose Casalegno, Alberto Cingolani, Liebert Parreiras Nogueira, Franca Castiglione, Havard J. Haugen, Filippo Rossi
Summary: This study proposes a strategy to use colloidal nanoparticles to form biphasic, stable, and porous structures at the polymer-water interface, which can enhance the mechanical properties of the devices and have wide applications in various fields.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Kata Dorbic, Marco Lattuada
Summary: This paper reviews the development of emulsion polymerization techniques and their exceptional control over the size, size distribution, and composition of polymer particles. It also covers the synthesis, functionalization, and applications of particles with protrusions and concavities. The rationalization of the various approaches used for particle preparation and the discussion of formation mechanisms are highlighted. The goal is to promote a broader use of these particles and the development of more effective synthetic protocols.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2023)
Review
Polymer Science
Olivia Z. Durham, Devon A. Shipp
Summary: Thiol-X polymerizations have been widely used in the production of polymer colloidal particles, offering high yields, rapid synthesis, and compatibility with various monomer species. These reactions have been applied in heterogeneous polymerizations using different methods, showcasing their adaptability and practicality. The step-growth mechanism in thiol-X polymerizations allows for straightforward polymer functionalization and the examples provided demonstrate their potential in creating new technologies.
Article
Multidisciplinary Sciences
Giovanni Del Monte, Domenico Truzzolillo, Fabrizio Camerin, Andrea Ninarello, Edouard Chauveau, Letizia Tavagnacco, Nicoletta Gnan, Lorenzo Rovigatti, Simona Sennato, Emanuela Zaccarelli
Summary: Thermoresponsive microgels are soft colloids that can undergo a Volume Phase Transition (VPT) close to ambient temperature. A recent study found that microgel collapse occurs through a two-step mechanism due to electrostatic effects, with the emergence of a minimum in the ratio between gyration and hydrodynamic radii at the VPT. Peripheral charges arising from the synthesis were identified as responsible for this behavior, and a universal master curve was constructed to predict the two-step deswelling process.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Polymer Science
Xin Guan, Jingjing Wei, Yufei Xia, To Ngai
Summary: In this study, a direct approach for the fabrication of noncovalent raspberry-shaped microgels was developed. This approach utilizes electrostatically driven heterocoagulation of binary microgels with complementary functional groups at the oil-water interface. The results show that the addition of hexanoic acid improves the hydrophobicity and interfacial activity of microgels, and raspberry-shaped microgels achieve high coverage on the droplet surface, resulting in an elastic interface and excellent stability of emulsions.
Article
Chemistry, Physical
Hailong Li, Marjorie Ladd-Parada, Aigerim Karina, Francesco Dallari, Mario Reiser, Fivos Perakis, Nele N. Striker, Michael Sprung, Fabian Westermeier, Gerhard Gruebel, Werner Steffen, Felix Lehmkuehler, Katrin Amann-Winkel
Summary: This study investigates the dynamics of the transition from high-density amorphous ice (HDA) to low-density amorphous ice (LDA) using X-ray photon correlation spectroscopy (XPCS). The results reveal non-isotropic and heterogeneous dynamics in the amorphous ice and are consistent with a scenario of static LDA islands floating within a diffusive matrix of high-density liquid water.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Polymer Science
Jiaxian Qiu, Yingrui Bai, Jinsheng Sun, Liyao Dai, Shaofei Lei, Fan Liu
Summary: The study focused on the synthesis method and performance characteristics of an oil-based gel-plugging agent with high structural strength and strong thermal stability, demonstrating its excellent gelling performance and high bearing capacity.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Yi Wang, Francesca Lorandi, Marco Fantin, Krzysztof Matyjaszewski
Summary: Polymerizations in aqueous dispersed media benefit from good heat transfer, low viscosity, low content of volatile compounds, and established industrial use. The implementation of ATRP in dispersed media has highlighted the possibility of achieving improved livingness and producing a variety of macromolecular architectures. ATRP techniques employing low-ppm catalyst loadings have enabled access to a larger variety of polymer architectures and functional polymer particles, which have found applications in molecular recognition, drug delivery, bio-quantification, and advanced coatings.
Review
Polymer Science
Julie Martin, Alexandre Desfoux, Jean Martinez, Muriel Amblard, Ahmad Mehdi, Lubomir Vezenkov, Gilles Subra
Summary: Peptides have been extensively used in designing materials with tailored properties, due to their wide range of biological activities. By associating with polymers, peptides can find promising applications in medical devices, tissue engineering, drug targeting, and delivery. Improvement of existing polymers and design of novel polymer materials can be achieved through post-modification peptide grafting or using peptides as initiators of polymerization.
PROGRESS IN POLYMER SCIENCE
(2021)
Article
Engineering, Environmental
Zhiheng Li, Jinni Yao, Yu Cao, Chengxue Ma, Shuangrui Yang, Hongxia Liu, Li Gu, Wanpeng Chen, Xiaoliu Huangfu
Summary: Media components and colloid particles have significant effects on the transport of Tl(I) in water-saturated porous media. The study focuses on the cotransport of Tl(I) and kaolinite under different conditions. The transport of Tl(I) is promoted under low pH and high IS, but inhibited under high IS in mica-quartz sand columns. The presence of kaolinite promotes Tl(I) transport due to its adsorption ability and competitive adsorption with Tl(I).
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Marek Kozicki, Malwina Jaszczak, Mariusz Dudek, Piotr Maras
Summary: This study explains the phenomenon of laser light trapping in a 3D polymer gel dosimeter, demonstrating its occurrence under specific dosimeter components and light conditions, and provides guidance for the optical measurement of dosimeters.
Article
Chemistry, Multidisciplinary
Bonwoo Koo, Cheoljae Kim
Summary: A stereocontrolled degradable polymer was synthesized via living cascade enyne metathesis polymerization from highly stereodefined N,O-acetal-containing enyne monomers. The resulting polymer can degrade under different acid concentrations, providing control over the degradation rate.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Polymer Science
Zhen Zhao, Yingrui Bai, Jinsheng Sun, Kaihe Lv, Shaofei Lei, Jiaxian Qiu
Summary: Hydrophobic association (HA) hydrogels with outstanding mechanical properties and self-healing capabilities were successfully synthesized through micellar copolymerization, showing promise for applications in biomedicine and engineering.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Shigehito Osawa, Sosuke Kurokawa, Hidenori Otsuka
Summary: This article introduces a method of constructing polymer metal complexes by designing metal complexes and acrylate monomers, and explores the feasibility of ideal copolymerization and the potential of preparing nano-colloids from polymers to build multimetallic materials.
CHEMICAL COMMUNICATIONS
(2022)
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.