Article
Polymer Science
Yu Chen, Tian Tang, Cagri Ayranci
Summary: This study investigates the effect of moisture on the mechanical properties of PLA and finds that the increase in moisture content leads to a decrease in instantaneous elastic compliance and a more flattened creep curve, indicating the existence of water-bridge-anti-plasticization effect. The findings highlight the importance of considering moisture's anti-plasticization effect on the viscoelasticity of PLA and provide a methodology for evaluating PLA's viscoelasticity for different applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Review
Materials Science, Multidisciplinary
Tuan Van Nguyen, Quyet Van Le, Shengjie Peng, Zhengfei Dai, Sang Hyun Ahn, Soo Young Kim
Summary: Electrochromism is the ability of a material to change its optical properties or color when an external potential is applied. Conventional electrochromic materials based on inorganic materials have drawbacks including single color change, expensive materials, and slow switching speed. To overcome these challenges, conducting polymers (CPs) have emerged as a promising alternative with advantages of multicolor, fast response, low cost, easy processing, and environmental friendliness. This review introduces the current state-of-the-art development of ECDs based on three popular CPs, namely, polyaniline, polypyrrole, and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate, with emphasis on their synthetic approaches and electrochromic performance.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Polymer Science
Bjoern Guenther, Thomas Kremser, Markus Susoff, Petr Formanek, Andreas Fery, Sven Wiessner
Summary: This study investigated the influence of masterbatches with different carrier resins on the impact resistance and morphology of an ABS/SAN blend. It found that masterbatches based on PS led to immiscibility, while those based on ABS and SAN showed no significant impact. Theoretical calculations were in good accordance with experimental results, suggesting the potential for predicting suitable masterbatch carriers based on solubility calculations between blend partners.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Automation & Control Systems
Lingxiao Xun, Gang Zheng, Sofiane Ghenna, Alexandre Kruszewski, Eric Cattan, Christian Duriez, Sebastien Grondel
Summary: In this study, an electromechanic model and an optimal controller were proposed for an IEPA actuator, which can produce large deformation under low actuation voltage. The models successfully predicted the deformation of the actuator under different input voltages, and the optimal controller achieved high control performance. This research lays the foundation for subsequent biomedical applications.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Review
Polymer Science
Radhika Mandala, Anjaneya Prasad Bannoth, Suresh Akella, Vijaya K. Rangari, Deepa Kodali
Summary: This study focuses on the recent advancements in FDM printing with biomaterials, highlighting the advantages of bio-based polymer composite matrices, the impact of fillers on filaments and products, and the evolution of novel characteristics of bio nanocomposites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Miriam Ferrara, Marianna Rinaldi, Lucia Pigliaru, Federico Cecchini, Francesca Nanni
Summary: This paper describes the development of a novel polyether ether ketone-magnetite soft magnetic composite, which was prepared using additive manufacturing and successfully 3D printed. The material exhibited stable thermomechanical properties and showed typical soft magnetic behavior. Finite element analysis simulation demonstrated promising performance of the composite material in electric motor applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Jackie Zheng, Md Arifuzzaman, Xiaomin Tang, Xi Chelsea Chen, Tomonori Saito
Summary: Plastics, as a lightweight and inexpensive material, have contributed significantly to society, with over 400 million metric tons being produced annually. However, the challenge of plastic waste management arises due to difficulties in reuse caused by the variations in chemical structures and properties. Current recycling processes often require additional sorting due to the mixture of different plastic types. Academic research aims to address this issue by developing technologies such as selective deconstruction catalysts and new types of upcycled plastics. Bridging the gap between academia and industry will enhance commercial recycling and create new economies, ultimately contributing to a net zero carbon society. This review serves as a guide to integrate academic research into industrial practices.
MATERIALS HORIZONS
(2023)
Article
Polymer Science
Daniel V. A. Ceretti, Rudinei Fiorio, Tom Van Waeleghem, Arne Desmet, Bauke Florizoone, Ludwig Cardon, Dagmar R. D'hooge
Summary: Acrylonitrile butadiene styrene (ABS) based polymeric composites containing graphene nanoplatelets (GNP's), multi-walled carbon nanotubes (CNT's), and titanium dioxide (TiO2) were studied for fused filament fabrication (FFF). The addition of all three nanoparticles resulted in improved dispersion and increased tensile modulus and strength of 3D printed ABS. Decreasing the layer thickness improved the mechanical properties, while printing temperature had minimal effect on the properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Caroline P. R. Malere, Bruno Donati, Nicholas Eras, Valdirene A. Silva, Liliane F. Lona
Summary: This study focused on radar absorbing materials based on conducting polymer polypyrrole (PPy) and organic-inorganic nanocomposites of PPy filled with lamellar structure kaolinite clay (PPy/Kao) for X-band frequency range application. The synthesized materials demonstrated effective electromagnetic wave absorption, with thermal stability above 120 degrees C and incident wave attenuation ranging from -10 to -33 dB (90%-99.9%) in the X-band.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Multidisciplinary Sciences
Ryan W. Clarke, Tobias Sandmeier, Kevin A. Franklin, Dominik Reich, Xiao Zhang, Nayan Vengallur, Tarak K. Patra, Robert J. Tannenbaum, Sabin Adhikari, Sanat K. Kumar, Tomislav Rovis, Eugene Y. -X. Chen
Summary: The global plastics problem has a significant impact on the environment, energy, and climate. Various innovative strategies have been proposed to address these issues and achieve a circular economy. However, the challenge of reusing mixed-plastics waste remains, as there is currently no effective closed-loop solution.
Article
Polymer Science
Pouran Rahnama Haratbar, Masoud Nasiri, Ahad Ghaemi
Summary: This study synthesized hypercrosslinked polystyrene adsorbents based on polystyrene (P-HCP) and expanded polystyrene (EPS-HCP) using a simple one-step Friedel-Crafts reaction for lead removal. The synthesized adsorbents showed high surface areas and porous morphologies. The experiments demonstrated that the hypercrosslinked adsorbent can effectively remove lead ions from the effluent solution, with optimal conditions of 30°C temperature, 40 minutes contact time, and 80 mg/L lead concentration.
IRANIAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Xin Liu, Naiqiao Guan, Haiyang Shen, Zhongtao Zhang, Boxi Chen, Yuheng Li, Shungang Hua
Summary: This study presents the utilization of a water-mixing nitrogen atmospheric pressure plasma jet to enhance the surface wettability of PEEK, demonstrating effective improvement without inducing significant microstructure damages. Optimum storing conditions were determined through aging experiments, indicating that low temperature and vacuum help retain the plasma-induced wettability. These findings may facilitate the application of PEEK in various fields.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Kostas Ch. Daoulas, Anastasia A. Markina
Summary: This article investigates the orientation of lamellae in polymer semiconductor films. A qualitative free-energy model is developed to study the deformation of lamellae as a function of film thickness, Young modulus, anchoring coefficient, and easy direction at the free surface. The calculations demonstrate the significant bending of lamellae under certain system parameters.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Jeffrey L. Self, Han Xiao, Matthew M. Hausladen, Rafael A. Bramanto, Saurabh Shenvi Usgaonkar, Christopher J. Ellison
Summary: Porous structures are widely found in nature and have inspired the development of synthetic porous polymer technologies. The use of bio-derived terpene camphene as a solvent and porogen for freeze-casting of thermoplastic parts under mild conditions is introduced in this study. The results demonstrate the successful production of porous samples and 3D printed parts with complex structures, highlighting the advantages of camphene as a sustainable and non-toxic porogen.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Polymer Science
Ketly Pontes, Tamara Indrusiak, Bluma G. Soares
Summary: The conductive blends of PVDF-co-HFP/PAni were prepared by in situ polymerization and dry blending approach, showing that samples prepared in H2O/toluene medium exhibited better performance. Different preparation methods and material compositions have significant effects on conductivity and electromagnetic interference shielding effectiveness.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Johannes Goerthofer, Matti Schneider, Felix Ospald, Andrew Hrymak, Thomas Boehlke
COMPUTATIONAL MATERIALS SCIENCE
(2020)
Article
Materials Science, Composites
Shengtai Zhou, Andrew N. Hrymak, Musa R. Kamal
POLYMER COMPOSITES
(2020)
Article
Engineering, Manufacturing
N. Meyer, L. Schoettl, L. Bretz, A. N. Hrymak, L. Kaerger
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2020)
Article
Metallurgy & Metallurgical Engineering
Ali Yahyaee Soufiani, Joseph Robert Mcdermid, Andrew Nick Hrymak, Frank Erik Goodwin
ISIJ INTERNATIONAL
(2020)
Article
Materials Science, Paper & Wood
Keller J. H. George, Aly Ahmed, Andrew N. Hrymak, M. Hesahm El Naggar
NORDIC PULP & PAPER RESEARCH JOURNAL
(2020)
Article
Polymer Science
Shengtai Zhou, Xue Lei, Junqi Mei, Andrew N. Hrymak, Musa R. Kamal, Huawei Zou
Summary: The study reveals that matrix viscosity significantly affects the properties of carbon nanotubes reinforced polyoxymethylene microparts, with samples prepared using higher matrix viscosity showing higher thermal stability. Additionally, the influence of different processing methods on the properties of POM/CNT composites is investigated.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Chemical
Zhongguo Zhao, Shengtai Zhou, Andrew N. Hrymak, Musa R. Kamal, Taotao Ai
Summary: The study found that the change in injection molding speeds has a significant impact on the crystal structure and formation of beta-nucleated iPP/PET microparts. Increasing injection speeds greatly increases the content of beta-crystals, but reduces the orientation degree of crystal lattice.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Engineering, Chemical
Keller J. H. George, M. Hesham El Naggar, Andrew N. Hrymak
Summary: A novel composite model for high-consistency wood pulp suspension processing was proposed, considering the unique rheology of fibrous suspensions and changes in consistency through liquid absorption and expression. The model was implemented into a simulator, which demonstrated the potential to predict major processing variables. While developed for wood pulp suspensions, the model could be easily adapted to other suspension processing applications if rheological properties are appropriately modeled.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Johannes Goerthofer, Matti Schneider, Andrew Hrymak, Thomas Boehlke
Summary: This study introduces a framework for anisotropic damage mechanics based on compliance tensor, designs thermodynamically consistent damage models, and demonstrates versatility and efficiency in various examples.
INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
(2022)
Article
Engineering, Chemical
N. Meyer, A. N. Hrymak, L. Kaerger
Summary: Sheet Molding Compounds (SMC) enhance the mechanical properties of a polymer with long discontinuous fibers while maintaining formability for integrating functions. Fiber architecture plays a crucial role in determining part properties during manufacturing. Accurate prediction of this architecture through simulation of flow can speed up the development process.
INTERNATIONAL POLYMER PROCESSING
(2021)
Article
Mechanics
Robert Bertoti, Daniel Wicht, Andrew Hrymak, Matti Schneider, Thomas Boehlke
Summary: Understanding the effective viscosity of fiber-filled polymer melts is crucial for predicting the local fiber orientation of injection molded short-fiber reinforced components. A computational homogenization method based on FFT is introduced to compute the effective quasi-static viscosity of particle-suspended Newton fluid. The computational experiments investigate the dependence of effective viscosity on microstructural parameters and provide a closed-form approximation for it.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2021)
Article
Chemistry, Applied
A. Yahyaee Soufiani, J. R. McDermid, A. N. Hrymak, F. E. Goodwin
Summary: This study investigates the effect of lower velocity symmetric auxiliary jets on main jet stabilization and coating thickness reduction during the gas jet wiping process. Experimental measurements and model predictions show that the use of auxiliary jets can reduce jet oscillations and increase the stability of the impinging flow, resulting in lower coating weights.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2022)
Article
Mechanics
Johannes Goerthofer, Matti Schneider, Andrew Hrymak, Thomas Boehlke
Summary: A holistic multiscale approach is proposed in this paper to construct anisotropic criteria for describing the macroscopic failure of sheet molding compound composites. The approach uses full-field simulations to study microscale damage evolution and employs an anisotropic damage model that directly operates on the compliance tensor. By utilizing Bayesian optimization with Gaussian processes, the damage material parameters used in the time-consuming full-field simulations are identified. The proposed method provides valuable insights for both structural analysis and design processes.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Chemical
Renze Jiang, Piyush Lashkari, Shengtai Zhou, Andrew N. Hrymak
Summary: In this study, the properties of polypropylene/graphite nanoplatelets (PP/GNP) composites and corresponding micromoldings were systematically investigated. It was found that using powder form PP resulted in higher electrical conductivity and lower percolation threshold compared to using pellet form PP. Moreover, the microparts prepared with powder-PP/GNP composites showed less preferential alignment of GNP particles along the flow direction, leading to improved overall electrical conductivity for PP/GNP micromoldings.
INTERNATIONAL POLYMER PROCESSING
(2022)
Article
Materials Science, Composites
Nils Meyer, Oleg Saburow, Martin Hohberg, Andrew N. Hrymak, Frank Henning, Luise Kaerger
JOURNAL OF COMPOSITES SCIENCE
(2020)
