Article
Polymer Science
Tao Zhang, Ho-Jong Kang
Summary: The effects of chain extender on the anisotropy and chain orientation behaviors of nylon 6/polyketone (PA 6/PK) blends were investigated. The results showed that the addition of chain extender promoted the formation of chain branches and hydrogen bonding in PA 6 chain. The presence of hydrogen bonding prevented crystallization and increased the anisotropic character in the PA 6 chain. Thus, the chain extender played an important role in improving the orientation behaviors of the blends.
Article
Multidisciplinary Sciences
Gregory S. Doerk, Aaron Stein, Suwon Bae, Marcus M. Noack, Masafumi Fukuto, Kevin G. Yager
Summary: In this study, machine-guided discovery of emergent morphologies from a cylinder/lamellae block copolymer blend directed by a chemical grating template was demonstrated without direct human intervention on a synchrotron x-ray scattering beamline. This approach enables mapping of the morphology-template phase space in less time than manual characterization, and highlights regions that warrant further investigation. The results reveal localized, template-directed partitioning of coexisting lamella- and cylinder-like subdomains at the template period length scale, resulting in previously unknown morphologies such as aligned alternating subdomains, bilayers, or a ladder morphology. This work emphasizes the crucial role that autonomous characterization can play in advancing the paradigm of directed self-assembly (DSA).
Article
Materials Science, Multidisciplinary
Lidia Jasinska-Walc, Miloud Bouyahyi, Jakub Kruszynski, Agnieszka Tercjak, Artur Rozanski, Enrico M. Troisi, Yingxin Liu, Lanti Yang, Ostap Ivashkiv, Maciej Sienkiewicz, Robbert Duchateau
Summary: The study investigated the performance of polypropylene-poly(ethylene brassylate) block and graft copolymers and a polypropylene-polycaprolactone graft copolymer as compatibilizers for polypropylene-rich polypropylene/bisphenol A polycarbonate blends. The copolymers were found to spontaneously organize at the interface of the two immiscible polymers, leading to the formation of uniform and stable nanophase morphologies. Well-compatibilized blends showed improved melt strength and strain hardening compared to pure polypropylene.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Caren Rosales, Nora Aranburu, Itziar Otaegi, Valeria Pettarin, Celina Bernal, Alejandro J. Mueller, Gonzalo Guerrica-Echevarria
Summary: This study proposes a solution to transform immiscible PE/PP blends into microfibrillar composites, achieving better performance than nonfibrillated blends by utilizing their immiscibility. The addition of a compatibilizer and the microfibrillation process showed a synergistic effect, indicating great potential for large-scale application in recycled polyolefin blends.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Caren Rosales, Nora Aranburu, Itziar Otaegi, Valeria Pettarin, Celina Bernal, Alejandro J. Muller, Gonzalo Guerrica-Echevarria
Summary: Polyolefin blends (PE/PP) have been transformed into microfibrillar composites (MFCs) to address the challenges of recycling these immiscible materials and improve their performance, in line with the concept of the circular economy.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Engineering, Chemical
Faten Ismail Abou El Fadl, Maysa A. Mohamed, Mamdouh M. Magida, Sayeda M. Ibrahim
Summary: This study focuses on the cross-linking of natural rubber latex (NRL) with the assistance of biopolymers to form hydrophilic blend films with water absorption properties. The prepared films showed a high affinity for basic blue dye, making them potential candidates for removing toxic dyes from wastewater.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Polymer Science
Adrian Perez, Emily Kynaston, Christopher Lindsay, Nicholas Ballard
Summary: This study demonstrates that multiphase latex particles containing semi-crystalline domains can be used to enhance the mechanical properties of coatings. By tailoring the particle size of the latexes, it is possible to achieve improved mechanical performance. This is achieved by maintaining the continuity of contact between semi-crystalline latex particles and improving the elongation at break of low T-g amorphous latex.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Physical
Osnat Zapata-Arteaga, Sara Marina, Guangzheng Zuo, Kai Xu, Bernhard Dorling, Luis Alberto Perez, Juan Sebastian Reparaz, Jaime Martin, Martijn Kemerink, Mariano Campoy-Quiles
Summary: A combinatorial study was conducted to investigate the effect of mixing different guests on the thermoelectric properties of the polymer PBTTT. The results showed that blends with guest weight fractions around 10-15% exhibited a significant increase in power factor compared to the reference material, resulting in higher zT values. Spectroscopic analysis and structural characterization revealed that the key to improved performance lies in the promotion of long-range electrical connectivity and low disorder by the guest, along with similar highest occupied molecular orbital levels for both materials to ensure electronic connectivity.
ADVANCED ENERGY MATERIALS
(2022)
Article
Computer Science, Information Systems
Xiaozhen He, Paolo Seri, Ilkka Rytoluoto, Rafal Anyszka, Amirhossein Mahtabani, Hadi Naderiallaf, Minna Niittymaki, Eetta Saarimaki, Christelle Mazel, Gabriele Perego, Kari Lahti, Mika Paajanen, Wilma Dierkes, Anke Blume
Summary: This study compares the suitability of two polymer-nanofiller blends for HVDC cable application, indicating that the comprehensive performance of the PP/PP-HI composite is better than the one of the PP/EOC composite. The addition of nanosilica improves thermal stability and dielectric properties, but slightly increases conductivity.
Article
Engineering, Manufacturing
Douglas M. Sassaman, Matthew S. Ide, Joseph J. Beaman, Desiderio Kovar
Summary: By analyzing video images captured during LPBF processing of nylon/alumina blends, we propose a mechanistic model based on permeation to predict the conditions required for particle bonding in indirect LPBF. Experimental results confirm the accuracy of the model.
ADDITIVE MANUFACTURING
(2022)
Article
Polymer Science
Maria Stella Cosio, Alessandro Pellicano, Claudio Gardana, Carlos Alberto Fuenmayor
Summary: This study investigates the effect of electrospun nylon-6 nanofibrous membranes (NFMs) on the concentration of bitter compounds and antioxidants in grapefruit juices during dead-end filtration processes. The results show that NFMs selectively retain low molecular weight antioxidants at early filtration stages and remove bitter glycosylated phenolics at a variable ratio depending on membrane thickness. Filtration of fresh grapefruit juice using NFMs reduces flavanones associated with immediate bitterness and completely removes limonin, the compound responsible for persistent bitterness. NFMs have potential in selectively reducing bitter terpenoids and glycosylated flavonoids from grape juice in the production of beverages.
Review
Materials Science, Multidisciplinary
Xiaoyu Chen, Dong Xiang, Zuoxin Zhou, Yuanpeng Wu, Hui Li, Chunxia Zhao, Yuntao Li
Summary: Polymer nanocomposites prepared by biaxial stretching exhibit excellent physical and chemical properties, multifunctional performance, and are suitable for the packaging industry. With the advancement of new materials and technologies, their range of applications continues to expand.
FRONTIERS IN MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Xiaochun Yin, Feng Lin, Guangjian He, Yanhong Feng
Summary: A new miniature mixing device called the vane mixer, dominated by the synergic action of axial and circumferential extensional deformations, has been developed for polymer blends. The research comprehensively investigates the effects of mixing time and rotational speed on the morphology, mechanical properties, and crystallization behavior of HDPE/GR composites. The experimental results show that the vane mixer has excellent mixing efficiency and performance.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Kirstie Snodderly, Andrew Cunningham, Noah Zipin, Myung Kyun Sung, Matthew Di Prima, Daniel Porter
Summary: As AM lattices become more popular in medical devices, it is important to consider how lattice design parameters affect the mechanical integrity and performance of a device. This research investigates the effect of lattice orientation on the compressive mechanical response of different lattice geometries. The results show that different lattice geometries have different degrees of orientation dependence, and increasing lattice relative density can reduce anisotropy among tested orientations.
MECHANICS OF MATERIALS
(2023)
Article
Polymer Science
Jipson Johnson, Mohammed Muzwar, Surya Ramakrishnan, Raghuram Chetty, Arul Prakash Karaiyan
Summary: Air filtration is crucial for the performance of engines, particularly in desert environments. Coating cellulose media with nylon-66 nanofibers can enhance filtration efficiency, although it increases pressure drop. This study demonstrates that electrospun nylon-66 nanofiber-coated air filters have higher Q-factor than cellulose media, making them a potential alternative.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
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.