Article
Polymer Science
Xiangyu Li, Tongfei Wu
Summary: Dynamic covalent polymers based on imine bond (FPIs) are capable of reorganizing their molecular structure. The rheological behavior of FPIs is similar to that of static linear entangled polymers predicted by Likhtman-McLeish theory, influenced by the dynamic chain arrangements caused by imine-bond exchange.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
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)
Article
Polymer Science
Chulmin Youn, Hyeon Jung Gwak, Younghwan Bae, Dokun Kim, Byeong Jin Yeang, Song Jun Doh, Sang Young Yeo
Summary: This study investigated the effect of thermal drawing process on the mechanical properties of PEI filaments. The results showed that optimizing the draw ratio, process temperature, and cooling temperature can lead to PEI filaments with excellent mechanical properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Ioannis Ioannou, Paraskevas Kyriacou, Marios Pantelas, Ioannis Pashalidis, John Makris, Spyros Rallis, Giachalis Kostas, Kyriakos Avraam, Theodora Krasia-Christoforou
Summary: The study focuses on the fabrication and thermomechanical characterization of fully recycled composite materials based on HDPE reinforced with bio-natural carbonized Luffa cylindrica inclusions. The use of the twin roll mill process enabled the production of polymer composites with variable c-LC content, with morphological and thermomechanical analysis confirming the reinforcing effect of biochar inclusions on HDPE thermoplastic. This opens the way for the potential use of such fully-recycled biochar thermoplastic composite materials in structural and semi-structural applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Mohammad M. Afroz, Yun Kyung Shin, Adri C. T. van Duin, Katie D. Li-Oakey
Summary: In this study, we used the ReaxFF simulation method to investigate the physiochemical and mechanical properties, as well as the stimuli response behavior, of a shape-memory polyurethane (SMPU) rigid segment. We developed models for both crystalline and amorphous forms of a common rigid segment of SMPUs and performed molecular dynamics simulations to predict their structural and physiochemical properties. This study provides a theoretical pathway for the application-oriented design of high-performance SMPUs in fields such as soft robotics.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
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, Composites
Shuai Li, Tianyu Wang, Jiqiang Hu, Bing Wang, Yingze Li, Lianchao Wang, Gao Li, Jialin Zhang, Zhengong Zhou
Summary: PEEK-HA composites show impaired tensile/bending strength and elongation at break with increasing HA content, but improved modulus. The compressive strength and modulus of PEEK-HA are enhanced with increasing HA amount. Smaller HA particle size in PEEK-HA leads to higher tensile/bending performance and lower compressive properties. In vitro osteogenesis tests reveal that higher HA content and smaller particle size result in more evenly flattened cells with increased cytoplasmic processes. The PEEK-HA composite with 20 wt% HA content and 20 nm particle size shows optimal osteogenesis performance while maintaining sufficient mechanical properties.
POLYMER COMPOSITES
(2021)
Article
Polymer Science
Guoqiang Wang, Jiaqi Song
Summary: The two bio-based polyesters exhibit higher glass transition temperature and melting temperature, with PDN showing higher tensile strength but lower elongation at break, and its complex viscosity being more sensitive to temperature and oscillation frequency.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Blanca Maria Lekube, Christoph Burgstaller
Summary: The study found significant differences in structure and properties among different blends with polylactid acid. Polyolefin based blends showed a high negative deviation from the rule of mixtures, while blends of PET and PS exhibited properties close to the rule of mixtures. Changes in glass transition temperatures indicated interactions between materials, with the PS/PLA pair showing the strongest interactions.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Composites
Jiqiang Hu, Hanqi Zhang, Shuai Li, Chunming Ji, Shuai Chen, Zhengong Zhou, Bing Wang
Summary: This study fabricated CFF/PEEK composites using the hot-pressing process and investigated the influence of process parameters on their mechanical properties. Tensile, flexural, and short-beam shear properties were tested to optimize the process parameters. The influence mechanism was revealed through the observation of high-temperature contact angle and viscosity-temperature characteristics, and the forming quality and microscopic failure modes were observed using various microscopy techniques.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Ligang Zhang, Hongchi Tian, Jun Chen, Yanping Hao, Yang Liu, Yawei Sun, Hongyun Duan
Summary: With the increasing awareness of environmental protection, there is a growing demand for eco-quality, especially in the field of materials. This study explored the effects of different active additives on the mechanical properties and crystallization behaviors of PLA, finding that ADR4468 chain extender, TPU elastomer, and talc had different influences on PLA materials.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Composites
Hansong Liu, Yan Zhao, Na Li, Shuang Li, Xuekuan Li, Zhiwei Liu, Sheng Cheng, Kai Wang, Shanyi Du
Summary: The sizing process is crucial for protecting carbon fiber surface and improving interfacial adhesion. In this study, polyetherimide (PEI) was chosen as the sizing agent for CF reinforced polyetheretherketone (CF/PEEK) composites, leading to enhanced mechanical properties and interfacial shear strength. The use of emulsion type sizing agent showed promising potential to replace solvent-based sizing agent in processing high temperature continuous CF reinforced thermoplastic composites.
POLYMER COMPOSITES
(2021)
Article
Engineering, Chemical
Christoph Burgstaller, Thomas Hoeftberger, Bernhard Gallnboeck-Wagner, Wolfgang Stadlbauer
Summary: Using ionizing radiation for sterilization of medical and health care products is a common method, but there is a lack of systematic study on the effects of different dose ranges and types of ionizing radiation on polymers. The study found that most polymers are not affected in terms of mechanical properties, but yellowing is a pronounced effect in all cases.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Agricultural Engineering
Xu Fan, Xiangyu Lin, Hongyi Shang, Lizhen Guo, Xu Xu, He Liu, Fuhao Dong
Summary: A novel fully bio-based multifunctional polymer (TCNC/TO) was designed using thioctic acid (TA), tung oil (TO), and cellulose nanocrystals (CNC). The polymer exhibits promising self-healing ability and improved mechanical properties when compared to polymers without CNC. Additionally, TCNC/TO shows outstanding recyclability and adhesion.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Polymer Science
Dong Xie, Qiyao Pang, Yang Zhao, Yuan Li, Fayong Li, Hui He
Summary: In this study, the interfacial compatibility between PBAT and PPC composites was improved by adding reactive compatibilizer TGIC, which enhanced the thermal stability and mechanical properties of the composites. PBAT/PPC/TGIC films prepared at 1 phr TGIC content showed higher tensile strength and elongation at break, and the water vapor transmission rate decreased by 33%.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Mechanics
Francesca Giulia Carozzi, Carlo Poggi, Elisa Bertolesi, Gabriele Milani
COMPOSITE STRUCTURES
(2018)
Article
Architecture
Carmelo Gentile, Carlo Poggi, Antonello Ruccolo, Mira Vasic
INTERNATIONAL JOURNAL OF ARCHITECTURAL HERITAGE
(2019)
Article
Engineering, Geological
Marco Furinghetti, Alberto Pavese, Virginio Quaglini, Paolo Dubini
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2019)
Article
Construction & Building Technology
Tommaso D'Antino, Francesca Giulia Carozzi, Carlo Poggi
MATERIALS AND STRUCTURES
(2019)
Article
Engineering, Civil
Francesca Giulia Carozzi, Diana Arboleda, Carlo Poggi, Antonio Nanni
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2020)
Article
Chemistry, Physical
Angelo Savio Calabrese, Tommaso D'Antino, Pierluigi Colombi, Christian Carloni, Carlo Poggi
Article
Engineering, Geological
Emanuele Gandelli, Sergey Chernyshov, Johan Distl, Paolo Dubini, Felix Weber, Andreas Taras
Summary: The article presents a novel adaptive hysteretic damper (AHD) that can adjust its effective damping and stiffness according to the intensity of earthquakes, reducing peak floor accelerations (PFAs) for minor earthquakes and ensuring structural safety under major seismic events.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Chemistry, Physical
Angelo Savio Calabrese, Tommaso D'Antino, Pierluigi Colombi, Carlo Poggi
Summary: The study investigates the long-term tensile behavior of PBO FRCM composites under different environmental conditions, showing only limited reductions in tensile properties even after long exposure to aggressive environments.
Article
Geosciences, Multidisciplinary
Gerard J. O'Reilly, Davit Shahnazaryan, Paolo Dubini, Emanuele Brunesi, Annalisa Rosti, Filippo Dacarro, Alberto Gotti, Davide Silvestri, Sergio Mascetti, Mattia Ducci, Mariano Ciucci, Alessandra Marino
Summary: Industrial plants are at risk of NaTech disasters due to earthquake damage and the potential release of toxic materials. The ROSSINI project aims to mitigate this risk by developing a data acquisition system and risk-based navigation application for safe worker egress during emergencies. The system estimates the risks associated with structural and non-structural damage and combines them with health risks from harmful substances to create a navigable risk map.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2023)
Article
Construction & Building Technology
Maria Rota, Martino Zito, Federica Bianchi, Paolo Dubini
Summary: This paper proposes a simple and ready-to-use seismic classification scheme for nonstructural elements, which can be applied to both newly designed and existing elements. The classification helps identify the best typology for the site and building, and prioritize interventions for existing elements.
Proceedings Paper
Engineering, Civil
Angelo Savio Calabrese, Tommaso D'Antino, Pierluigi Colombi, Christian Carloni, Carlo Poggi
Summary: Externally bonded fiber-reinforced composites (FRCM) are proven to be an effective solution to increase the fatigue life of reinforced concrete (RC) structures. However, limited research has been conducted on the fatigue behavior of the bond between the FRCM and the substrate. This paper provides a state-of-the-art review on the fatigue behavior of RC beams strengthened with different FRCM composites and presents preliminary results of an ongoing experimental campaign studying the bond fatigue behavior of polyparaphenylene benzo-bisoxazole (PBO) FRCMs.
10TH INTERNATIONAL CONFERENCE ON FRP COMPOSITES IN CIVIL ENGINEERING (CICE 2020/2021)
(2022)
Proceedings Paper
Engineering, Civil
Tommaso D'Antino, Angelo Savio Calabrese, Pierluigi Colombi, Carlo Poggi
Summary: Fiber (or fabric) reinforced cementitious matrix (FRCM) composites are an attractive alternative to fiber reinforced polymer (FRP) composites for externally bonded reinforcement (EBR) of existing reinforced concrete (RC) and masonry structural members. This study proposes a method to verify the effective lap-splice length needed for the bond capacity of FRCM composites with overlapped textile. The proposal is based on comparing clevis-grip tensile tests and direct shear tests, and is validated by nonlinear finite element numerical models.
10TH INTERNATIONAL CONFERENCE ON FRP COMPOSITES IN CIVIL ENGINEERING (CICE 2020/2021)
(2022)
Proceedings Paper
Construction & Building Technology
F. G. Carozzi, T. D'Antino, A. Gatti, G. Mantegazza, C. Poggi
PROCEEDINGS OF ITALIAN CONCRETE DAYS 2018
(2020)
Proceedings Paper
Construction & Building Technology
Luigi Ascione, Francesca Giulia Carozzi, Tommaso D'Antino, Carlo Poggi
XIV INTERNATIONAL CONFERENCE ON BUILDING PATHOLOGY AND CONSTRUCTIONS REPAIR
(2018)
Proceedings Paper
Construction & Building Technology
Francesca Giulia Carozzi, Tommaso D'Antino, Carlo Poggi
XIV INTERNATIONAL CONFERENCE ON BUILDING PATHOLOGY AND CONSTRUCTIONS REPAIR
(2018)
