The aim of this work was to show the evolution over time of the dynamic moduli in components made of Polybutylene Terephthalate reinforced with glass fiber when they are held to temperatures close to the glass transition temperature over time. For this purpose, PBT samples reinforced with short, glass fibers of Ultradur material with 0%, 20%, and 50% in weight content were tested. Dynamic moduli showed an increment with glass fiber content showing a nonlinear behavior with the temperature. The evolution of storage modulus was depicted by means of a modified law of mixtures with an effectiveness factor depending on temperature and fiber content, whereas the evolution over time was obtained with a time-temperature transformation generated with the TTS Data Analysis software of TA-instruments for a given temperature. Storage modulus showed a linear relationship with glass fiber content when components were held to temperatures near to their respective glass transition temperature, obtained from the maximum of loss modulus curve with temperature. In summary, the value and evolution of dynamic moduli of PBT samples improved with glass fiber content, allowing us to increase the durability of components when they are submitted to high-temperature environments.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7864188 | PMC |
| http://dx.doi.org/10.3390/ma14030483 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Experimental investigation and finite element analysis on the durability of root-filled teeth treated with multisonic irrigation.
Dent Mater
January 2025
Minnesota Dental Research Center for Biomaterials and Biomechanics, School of Dentistry, University of Minnesota, Minneapolis, MN, USA. Electronic address:
Objective: This study compared the fracture load, stress distribution, and survival probability under cyclic loading of extensively restored teeth treated with multisonic irrigation with those treated with conventional instrumentation, with or without a post.
Methods: Mesial-occlusal-distal cavities were prepared in 30 human mandibular premolars. The teeth were randomly divided into 3 groups of 10 based on the endodontic and restorative procedures: (1) Root canal treatment (RCT) followed by resin composite restoration (control group), (2) RCT followed by a glass fiber post restoration (conventional group), and (3) minimal instrumentation plus multisonic irrigation followed by resin composite restoration (GW group).
Basic Science and Pathogenesis.
Alzheimers Dement
December 2024
Interdisciplinary Institute for Neuroscience (UMR 5297), University of Bordeaux, Bordeaux, Gironde, France.
Background: PhospholipaseC γ2 (PLCG2) is known to have direct link with genetic risk factors for Alzheimer's like dementia (AD). PLCG2 has been previously demonstrated to have association with Aß uptake through microglia. And mostly expressed in dentate gyrus (DG) network of hippocampus.
View Article and Find Full Text PDFElimination of nickel ions in a packed column using clamshell waste as an adsorbent.
Sci Rep
January 2025
Department of Nuclear and Renewable Energy Sources, Ural Federal University, Yekaterinburg, 620002, Russia.
The present investigation assessed the viability of utilizing a powdered clam shell in continuous adsorption to eliminate nickel ions from simulated wastewater. The breakthrough curves (BTC) were analyzed by altering the Q (inlet flow rate) in a glass column (ID 5 cm, H 35 cm) with a multi-port and filled with the powdered clamshell adsorbent (PCSA). The PCSA's nickel adsorption efficiency was maximum (87.
View Article and Find Full Text PDFEmerging 0D Hybrid Metal Halide Luminescent Glasses.
Adv Mater
January 2025
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510641, China.
Article Synopsis
- 0D hybrid metal halide (HMH) luminescent glasses are gaining popularity due to their unique chemical properties and connection to crystalline forms, but their glass-forming abilities and luminescent characteristics are not fully understood.
- The review discusses the formation of these glasses through melt-quenching, examines the current compounds that can create stable glassy phases, and explores their structural features, such as transparency and luminescence.
- Additionally, potential applications in areas like X-ray detection, anti-counterfeiting, and information encryption are highlighted, along with insights into future developments for 0D HMH glasses.
Robust low threshold full-color upconversion lasing in rare-earth activated nanocrystal-in-glass microcavity.
Light Sci Appl
January 2025
State Key Laboratory of Luminescent Materials and Devices, and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, 510640, Guangzhou, China.
Visible light microlasers are essential building blocks for integrated photonics. However, achieving low-threshold (μW), continuous-wave (CW) visible light lasing at room temperature (RT) has been a challenge because of the formidable requirement of population inversion at short wavelengths. Rare-earth (RE)-activated microcavities, featuring high-quality factor (Q) and small mode volume of whispering gallery modes, offer a great opportunity for achieving infrared-to-visible upconversion (UC) lasing.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!