Article
Polymer Science
Elodie Louisy, Gaelle Fontaine, Valerie Gaucher, Fanny Bonnet, Gregory Stoclet
Summary: This study compared the thermal and mechanical properties of macrocyclic and linear topologies of PLA with identical molar masses, revealing differences in glass transition temperature, melting temperature, crystallization rate, and strain-hardening behavior. The findings suggest that the differences are due to the more constrained entangled network in macrocyclic PLA and/or faster disentanglement kinetics in linear PLA.
Article
Polymer Science
Adnan Amjad, M. Shukur Zainol Abidin, Hassan Alshahrani, Aslina Anjang Ab Rahman
Summary: Natural fibre reinforced polymer composites are increasingly popular in automotive applications, with the addition of Al2O3 and MgO nanofillers showing significant improvements in mechanical properties. Surface treatment of fibres and nanofiller addition play crucial roles in enhancing the overall performance of the composites, demonstrating superior tensile, flexural, and impact properties in the hybrid nanocomposites. The SEM images reveal various defects that impact the mechanical behavior of the composites, highlighting the importance of optimizing the composition for enhanced performance.
Article
Chemistry, Physical
Olugbenga Ogunbiyi, Oluwashina Gbenebor, Smith Salifu, Samuel Olaleye, Tamba Jamiru, Rotimi Sadiku, Samson Adeosun
Summary: This study fabricated biodegradable polylactide (PLA) reinforced with treated coconut husk particulates (CCP) through electrospinning and RVE techniques, and compared the obtained mechanical properties. The electrospun CCP-PLA nanofibre composites showed improved mechanical properties, particularly at 4 wt.% reinforcement.
Article
Polymer Science
J. Tarique, E. S. Zainudin, S. M. Sapuan, R. A. Ilyas, A. Khalina
Summary: This research focuses on developing and characterizing arrowroot starch-based biocomposite films by incorporating fibers, which improve the mechanical properties and water absorption of the films. The results show that adding fibers significantly increases the tensile and tear strengths of the films, with the optimum filler content being 10%. Additionally, the composite films absorb more water when immersed in seawater and rainwater.
Article
Materials Science, Ceramics
Dan Xing, Chao Chang, Xiong-Yu Xi, Bin Hao, Qingbin Zheng, Sergey Gutnikov, Bogdan Lazoryak, Peng-Cheng Ma
Summary: This study investigated the effects of different temperature treatments in air atmosphere on the morphology and properties of basalt fibre (BF). It was found that heat treatment led to the formation of crystals on the fibre surface, changing the properties of BF. The reduction in tensile strength of BF occurred in three temperature ranges: 100-400 degrees C, where the decomposition of organic sizing on the fibre surface exposed more defect structures; 500-600 degrees C, where the amorphous matrix in the fibre experienced phase separation and structural relaxation; and 700-1000 degrees C, where the formation of various crystals caused structural modification.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Textiles
M. Jawaid, S. Awad, Hassan Fouad, Othman Y. Alothman, N. Saba, M. Sain, A. L. Leao
Summary: This study evaluates the impact of different olive tree residues on the thermal properties of olive/epoxy biocomposites. The results show that olive tree leaves as a filler improve the thermal and dynamic mechanical properties of the biocomposites. Meanwhile, olive tree small branch-filled biocomposites exhibit the highest storage modulus and lowest coefficient of thermal expansion.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Polymer Science
B. Pascual-Jose, J. D. Badia, A. Mugica, Frederic Addiego, Alejandro J. Muller, A. Ribes-Greus
Summary: This study analyzed the dielectric properties of both neat and plasticized polylactide after repeated extrusion and injection processes, finding that the addition of plasticizer significantly influenced the dielectric behavior of polylactide.
Article
Chemistry, Physical
Aneta Tor-Swiatek, Tomasz Garbacz, Petr Stloukal
Summary: This study investigated the hydrolytic degradation behavior of microporous polylactide (PLA) in biological buffer solutions with varying pH. The mechanical analysis showed the influence of pH on the results. The rate of degradation was comparable to that of pure PLA, with slightly accelerated degradation in acidic pH conditions.
Article
Polymer Science
W. Jarrett, F. Korkees
Summary: Graphene nanoparticles have shown promising effects in carbon fiber/epoxy composites, improving water uptake resistance and stability under UV exposure. However, the impact on glass transition temperature is minimal.
Article
Mechanics
T. W. Loh, A. A. Khatibi, A. P. Mouritz
Summary: A combined experimental and modelling study was conducted to investigate the scatter in failure loads and failure times of load-bearing fibre reinforced polymer laminates exposed to fire, leading to uncertainty in quantifying structural survivability. The analysis revealed that factors such as heat flux and applied compression load contribute to the scatter in deformation rate and time-to-failure of the laminates. A statistical-based model was proposed to predict the scatter in compressive failure stress and time-to-failure of fibreglass laminates under fire exposure and compression loading.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Manufacturing
Kui Lin, Tao Yu
Summary: This paper presents a study on the deterioration mechanism of fibre-matrix interfaces in fibre-reinforced polymer composites under different temperatures using molecular dynamics simulations. The results provide insights into the relationship between interface properties and deterioration mechanism with thermal-mechanical actions, which can be used for accelerated tests design and future durability modelling of composite materials.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Construction & Building Technology
Mylene M. Vieira, Sergio H. P. Cavalaro, Antonio Aguado, Dimas A. S. Rambo, Renan P. Salvador
Summary: This study investigated the surface corrosion of steel fibres in high-performance fibre reinforced cementitious composites from a quantitative standpoint. The experiment involved different mixtures of short straight steel fibres and wetting-drying cycles in a 5% NaCl solution. Results showed the formation of corrosion spots on specimen surface, but no significant reduction on the post-cracking response.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Polymer Science
Mateusz Barczewski, Olga Mysiukiewicz, Aleksander Hejna, Radoslaw Biskup, Joanna Szulc, Slawomir Michalowski, Adam Piasecki, Arkadiusz Klozinski
Summary: In this study, thermally expanded vermiculite (TE-VMT) was modified and used as a filler in composites with a polylactide (PLA) matrix. The modification improved dispersion and interfacial adhesion of vermiculite in the matrix, resulting in enhanced impact strength and thermal-mechanical stability of the composites.
Article
Engineering, Manufacturing
Wenhan Tian, Kang Yang, Sujun Wu, Jiping Yang, Hongyun Luo, Juan Guan, Robert O. Ritchie
Summary: The study found that high hydration conditions can lead to more susceptible interfacial failure in silk fiber-reinforced polymers (SFRPs), while mild hydration treatment appears not to affect SFRPs. Acoustic emission analysis revealed that interface failure plays a key role in the damage modes of SFRPs.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Thermodynamics
Krzysztof Moraczewski, Krzysztof Szablinski
Summary: The research findings reveal that polydopamine and tannic acid coatings can enhance the resistance of polylactide against oxidation and thermal degradation, with minimal impact on phase transitions.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
