Article
Engineering, Chemical
Kristen Rohm, Vahab Solouki Bonab, Ica Manas-Zloczower
Summary: An in situ polymerization method was used to prepare TPU/graphene and TPU/graphite composites, and it was found that the intrinsic properties and dispersion level of fillers have significant effects on the morphology and properties of TPU. The variations in glass transition temperature and thermal transitions of TPU composites were related to the agglomeration level and intrinsic filler properties.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Polymer Science
Sahar Amiri, Shahrnaz Mokhtari
Summary: In this study, Alkenyl succinimides with different alkyl chain lengths were synthesized using polyisobutylene (PIB) of varying molecular weights, which exhibited the best functional properties. Detergent/dispersant type additives were prepared based on polyisobutylene succinic anhydride (PIBSA) and its aminated compounds (PIBSI) with tetraethylenepentamine (TEPA), and characterized by various spectroscopic techniques.
Article
Electrochemistry
Anna Mills, Guang Yang, Wan-Yu Tsai, X. Chelsea Chen, Robert L. Sacci, Beth L. Armstrong, Daniel T. T. Hallinan Jr, Jagjit Nanda
Summary: In this study, it was demonstrated that argyrodite sulfide (Li6PS5Cl) solid-state electrolyte can be combined with a small amount of poly(isobutylene) (PIB) binder to prepare free-standing thin film electrolytes. The thin films showed low specific resistance, reduced thickness, and comparable room temperature ionic conductivity. However, the introduction of polymer binder resulted in voids in the thin film electrolytes, compromising ion transport at the anode/electrolyte interface.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Zepeng Lei, Hongxuan Chen, Chaoqian Luo, Yicheng Rong, Yiming Hu, Yinghua Jin, Rong Long, Kai Yu, Wei Zhang
Summary: Chemical recycling of polymers is crucial for improving the circular economy and sustainability of plastics. This study demonstrates the possibility of recycling traditional polycyanurate thermosets by activating dormant covalent bonds. By redirecting the synthetic route and creating a reversible synthetic pathway, previously inaccessible alkyl-polycyanurate thermosets with high recyclability and reprocessing capability were successfully synthesized.
Review
Engineering, Chemical
Jessica B. Y. Alves, Mateus K. Vasconcelos, Lys H. R. Mangia, Maxmiliano Tatagiba, Juliana Fidalgo, Daniela Campos, Pedro L. Invernici, Marcio V. Reboucas, Marcio Henrique S. Andrade, Jose Carlos Pinto
Summary: Polyisobutylenes are versatile polymer materials used mainly as fuel and lubricant additives. The commercial demand for highly reactive polyisobutylene products has driven the development of new processes to produce PIBs with high polymer yields, narrow molar mass distributions, and high vinyl contents.
Review
Chemistry, Applied
Nyok Ling Tai, Mehran Ghasemlou, Raju Adhikari, Benu Adhikari
Summary: Starch has garnered significant interest in the development of biodegradable bioplastics due to its impressive physicochemical properties when used in polyurethane (PU) composites. Despite the hydrophilic nature of starch limiting its dispersion in hydrophobic PU matrices, strategies are being developed to improve compatibility and enhance the biodegradation characteristics of the final PU products. Advances in the synthesis of starch-NIPU hybrids are also being explored to further boost biodegradability of PUs.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Inorganic & Nuclear
Anna Wladyczyn, Anna Gagor, Katarzyna Slepokura, Lukasz John
Summary: In this study, the preparation, isolation, and characterization of a family of double-decker silsesquioxane architectures were reported. A method to obtain pure cis and trans isomers of double-decker silsesquioxanes was described, which may lead to the preparation of new materials and polymers with well-defined properties.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Review
Pharmacology & Pharmacy
Louise Carson, Ruth Merkatz, Elena Martinelli, Peter Boyd, Bruce Variano, Teresa Sallent, Robert Karl Malcolm
Summary: This timely review article provides an overview of various aspects related to the vaginal microbiome and vaginal ring technology, including vaginal microbiota, biofilm formation, mechanistic aspects of biofilm formation on polymeric surfaces, polymeric materials used in the manufacture of vaginal rings, surface morphology characteristics of rings, biomass accumulation and biofilm formation on vaginal rings, and regulatory considerations.
Article
Chemistry, Physical
Austin S. Mills, Evan Chou, Zachary Baierl, Kathryn A. Daltorio, Gary E. Wnek
Summary: This study focuses on the behavior modeling of simple polymeric bilayers and finds that the Generalized Maxwell model can most accurately predict their curvature and relaxation time, laying the foundation for designing more complex bilayer systems.
Article
Polymer Science
Elena Platonova, Islam Chechenov, Alexander Pavlov, Vitaliy Solodilov, Egor Afanasyev, Alexey Shapagin, Alexander Polezhaev
Summary: A series of thermally remendable and recyclable polyurethanes crosslinked via reversible furan-maleimide Diels-Alder reaction showed strong dependency of Young modulus on BMI content, allowing for materials with varying elasticity. The DA and retro-DA reactions between furan and maleimide were investigated by various analytical techniques, demonstrating high strengths and recyclability in at least five reprocessing cycles.
Article
Polymer Science
Luis A. Chavez, Paulina Ibave, Md Sahid Hassan, Samuel E. Hall-Sanchez, Kazi Md Masum Billah, Alba Leyva, Cory Marquez, David Espalin, Sabrina Torres, Thomas Robison, Yirong Lin
Summary: This study demonstrates a method to fabricate and engineer HPP using a desktop SLS printer by blending a high-performance polymer with a commercial low-temperature polymer and implementing post-processing heat treatments. The treated blends exhibited significantly improved mechanical properties and thermal resistance compared to PA-12 alone.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Miguel Llera, Frederic Flahaut, Sylvain Bergerat, Justin Benoit, Rowan Luethi, Frederic Mathez, Sebastien Le Floch, Yves Salvade
Summary: A new approach has been developed to produce elastomeric optical fibers with optical behavior similar to few-mode optical fibers. Different fibers are created by first fabricating thermoplastic polyurethane preforms and then stretching them. The fiber characteristics are evaluated and the potential for future applications is discussed, showing promising prospects for new and unexplored uses.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Biochemistry & Molecular Biology
Dominik Wolosz
Summary: This study provides insights into the transurethanization reactions in the synthesis of aliphatic-aromatic non-isocyanate poly(carbonate-urethane)s (NIPCUs) and their relationship with structure and properties. It was found that the alkyl chain length in 4,4 '-diphenylmethylene bis(hydroxyalkyl carbamate) (BHAC) plays a crucial role in these reactions. The presence of longer alkyl chains in the BHAC structure prevents side reactions.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Polymer Science
Elif Kurnaz, Sinan Sen, Nihan Nugay, Turgut Nugay
Summary: A new method for preparing a novel and reprocessable biobased polyisobutylene (PIB) - polyurethane (PU) network using a soybean oil (SBO) derivative was reported. By converting SBO triglycerides to a polyol with primary hydroxyl functionalities via UV activated thiol-ene chemistry, a successful integration of the SBO based polyol to PIB-PU formulation was achieved, resulting in a nearly optically clear film with high mechanical and thermal stability. The hydrolyzed SBO/PIB-PU could be used as building blocks in the development of polymer conjugates and nanocomposites.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Polymer Science
Xiang-Zhao Wang, Dong-Mei Xie, Xiao-Li Zhao, Yi-Dong Li, Jian-Bing Zeng
Summary: This study developed sustainable and reprocessable poly(urethane urea) covalent adaptable networks (CANs) by incorporating reversible piperazine-urea bonds (PaUBs) into castor oil-derived polyurethanes (CPUs). The CANs showed variable tensile behavior, excellent malleability, stable reprocessability, and multiple recyclability.
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.