Article
Materials Science, Composites
Bowen Xu, Bart van den Hurk, Sean J. D. Lugger, Tao Liu, Rijk Blok, Patrick Teuffel
Summary: This article investigates the effect of environmental humidity on the creep behavior of flax fiber-reinforced polymer (FFRP) composites. The creep of samples with 0 degrees and 90 degrees fiber increases with increasing relative humidity, while the samples with +/- 45 degrees fiber are not significantly affected by humidity. The change in the fiber-matrix interface and cracks between microfibrils in a fiber bundle are the main reasons for the change in creep behavior in high humidity.
POLYMER COMPOSITES
(2023)
Article
Engineering, Mechanical
B. N. V. S. Ganesh K. Gupta, Bhaskar Sen, Mritunjay Maharudrayya Hiremath, Rajesh Kumar Prusty, Bankim Chandra Ray
Summary: This study compares the performance of glass fiber reinforced epoxy-vinyl ester interpenetrating polymer network (GEVIPN) composite with the base materials, GE and GVE composites, through flexural testing and lifetime prediction at different temperatures. The results indicate that the GEVIPN composite exhibits higher creep resistance at lower temperatures and the opposite trend at elevated temperatures.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Review
Nanoscience & Nanotechnology
Aarti P. More
Summary: Flax fiber is a popular natural fiber used as a reinforcing agent for polymer composites. Surface treatment improves the adhesion between fiber and polymer, enhancing mechanical performance. Additionally, flax fiber composites are more environmentally friendly compared to petroleum-based composites.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Polymer Science
Aggelos Koutsomichalis, Thomas Kalampoukas, Dionysios E. Mouzakis
Summary: The study aimed to manufacture hybrid composites with superior ballistic performance and analyze their viscoelastic and mechanical response. Various composites were manufactured from different fabrics and analyzed through static bending and dynamic mechanical analysis. The study also proposed a new mathematical function for high accuracy in time-temperature superposition analysis.
Article
Materials Science, Composites
M. S. Irfan, R. A. Alia, T. Khan, W. J. Cantwell, R. Umer
Summary: This study evaluated the long-term creep response of high-performance carbon fiber PEKK composites and found that the quasi-isotropic stacking sequence exhibited superior creep resistance, flexural modulus, and flexural strengths.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Materials Science, Paper & Wood
Hui Peng, Tianyi Zhan, Jiali Jiang, Yaoli Zhang, Jinzhen Cao, Jianxiong Lu
Summary: This study investigated the effects of moisture and temperature on the creep behavior of Chinese fir, revealing that the time-moisture and time-temperature superposition principles can describe the evolution of creep and overlap under certain conditions. An equivalent relationship between moisture and temperature effects on creep behavior was assumed based on the results obtained.
WOOD MATERIAL SCIENCE & ENGINEERING
(2022)
Article
Materials Science, Composites
Bowen Xu, Bart van den Hurk, Sean J. D. Lugger, Rijk Blok, Patrick Teuffel
Summary: This study investigates the creep behavior of flax fiber-reinforced polymer composites (FFRP) using the time-temperature superposition principle (TTSP). Three potential methods for calculating the critical parameters during TTSP are compared to obtain an efficient application method to build the creep master curve. A long-term creep test is conducted to validate the accuracy of the creep analysis results and provide valuable insights for the practical application of FFRP in the construction industry. The research results also contribute to better understanding the creep behavior of FFRP via short-term accelerated tests.
SCIENCE AND ENGINEERING OF COMPOSITE MATERIALS
(2023)
Review
Materials Science, Multidisciplinary
Hongbin Li, Rongrong Tang, Jiliang Dai, Zixuan Wang, Shiqi Meng, Xiang Zhang, Feng Cheng
Summary: This review provides a summary of the recent developments of flax fiber-based functional composites for energy, biomedical, and environmental applications. The design and fabrication strategies, as well as the most promising applications, are discussed. The unique properties of flax fiber as a functional composite, such as specific mechanical properties, good biocompatibility, eco-friendliness, cost-effectiveness, and flexibility in design and manufacturing, are highlighted.
ADVANCED FIBER MATERIALS
(2022)
Article
Polymer Science
Amer Oun, Allan Manalo, Omar Alajarmeh, Rajab Abousnina, Andreas Gerdes
Summary: Natural fiber composites have acceptable mechanical properties at ambient temperatures, but their performance at elevated temperatures is not well understood. The addition of graphene can significantly enhance the flexural strength and interlaminar shear strength of the composites, but excessive graphene content leads to the formation of voids.
Review
Chemistry, Physical
James A. King, Xin Zhang, Michael E. Ries
Summary: This review focuses on the structure and properties of silk-based composites, with a particular emphasis on employing the time-temperature superposition principle to reveal the kinetics of the formation process. A variety of applications derived from silk-based composites will be explored, and the benefits and constraints of each application will be presented and discussed.
Article
Polymer Science
Zaineb Baccouch, Adel Hamdi, Hedi Nouri, Sofiane Guessasma
Summary: This study focuses on identifying the mechanical behavior parameters of a PA6/flax fiber composite through experimental and numerical methods, confirming that the model is capable of properly fitting the creep characteristics of the material.
Article
Materials Science, Composites
Tran Huu Nam, Ken Goto, Yuta Tobata, Yuki Kubota, Masahito Ueda, Satoshi Kobayashi
Summary: A plain woven carbon fabric reinforced polyamide (CF/PA) composite laminate was developed using hot-pressed processing with a vacuum-assisted system. The mechanical properties of the CF/PA composite laminate under longitudinal compressive loading were found to be temperature-dependent. The compressive strength and strain at maximal stress reduced rapidly below 80 degrees C, while the compressive modulus declined slightly underneath 50 degrees C.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Mechanics
Heitor L. Ornaghi Jr, Jose Humberto S. Almeida, Francisco M. Monticeli, Roberta M. Neves, Maria Odila H. Cioffi
Summary: This study investigates the time-temperature creep behavior of advanced composite laminates through experiments and analytical modeling, involving Weibull, Eyring, Burger, and Findley models. Experimental creep tests conducted in ten min and two days aim at calibrating fitting parameters essential for validating short-term creep tests. Weibull and Eyring models are found to be more suitable for determining the time-temperature superposition creep response compared to Burger and Findley models.
MECHANICS OF TIME-DEPENDENT MATERIALS
(2021)
Article
Multidisciplinary Sciences
Daniel A. Souto-Silvar, A. Alvarez-Garcia, A. Diaz-Diaz, Francisco J. Rodriguez-Dopico, Jorge Lopez-Beceiro
Summary: The aim of this study is to predict the long-term behavior of adhesives in ships by applying the time-temperature superposition principle (TTS). Dynamic mechanical analysis (DMA) experiments were conducted to study the adhesive behavior under both dynamic and sustained loading. The results will provide insights into the durability of adhesives in shipbuilding.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Yan Peng, Huaizhi Liu, Yumeng Xin, Jiuyang Zhang
Summary: This study introduces polymer relaxation into conductive materials to create a special rheological conductor, which can achieve orders of magnitude change in resistance through temperature and time regulation. The dynamics of polymer chains provide diverse resistive responses to temperature, time, and voltage for this conductor.
Article
Polymer Science
Olena Shafranska, Alexander Jones, Alex Perkins, Joseph Dahlgren, Janice Tardiff, Dean C. Webster
Summary: High oleic soybean oil and hydrogenated soybean oils with different degrees of unsaturation were studied as bio-based plasticizers for EPDM rubber filled with carbon black and vulcanized with sulfur. The oil with the highest unsaturation level showed the greatest plasticizing effect, but also interacted with sulfur to lower crosslink density and deteriorate mechanical properties. Hydrogenated oil with saturated fatty acid chains did not decrease crosslink density, improved mechanical properties, but was less effective as a plasticizer for EPDM.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Rawan Omar, Muneer Shaik, Chloe Griggs, Jevin D. Jensen, Robert Boyd, Nuri Oncel, Dean C. Webster, Guodong Du
Summary: This study successfully synthesized a series of star-shaped poly (beta-hydroxybutyrates) (PHBs) through ring-opening polymerization of cyclic esters using multifunctional initiators, and characterized their structure and properties through various techniques. The thermal properties of star-shaped PHBs can be modified by changing the arm number and arm length, while the wetting behavior of star-shaped PHBs is influenced by the number of arms.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Chemistry, Applied
AliReza Rahimi, Morgan Murphy, Kinza Faiyaz, Shane J. Stafslien, Lyndsi Vanderwal, Madhura Pade, John A. Finlay, Anthony S. Clare, Dean C. Webster
Summary: This study demonstrates a new method to prepare self-stratified marine coatings with fouling-release properties. The performance of the coatings was influenced by factors such as molecular weight and ratio of hydrophobic and hydrophilic components. The prepared coatings showed promising performance compared to commercial marine coatings.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2022)
Article
Chemistry, Applied
Deep Kalita, Ihor Tarnavchyk, Dean C. Webster, Bret J. Chisholm
Summary: A series of plant oil based polyvinyl ethers were synthesized and evaluated as potential replacements for linseed oil in artists' paints. The synthesized poly(POVE)s exhibited faster drying behavior than linseed oil and showed similar trends in the presence of drying catalysts or pigments. Drying time and viscosity could be adjusted by varying the molecular weight of the poly(POVE)s. Purified poly(POVE) binders resulted in significantly lower yellowness and better mechanical properties compared to those made using linseed oil as the binder in films produced with TiO2 pigment.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Chemistry, Multidisciplinary
Jingbo Wu, Yiqiu Qian, Catherine A. Sutton, John J. La Scala, Dean C. Webster, Mukund P. Sibi
Summary: A series of photocurable di(meth)acrylates based on furan-based diols were synthesized and evaluated for use in UV-curable coatings. These compounds exhibited high hardness, elastic modulus, and glass transition temperature, showing potential for applications in coating materials.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Ravichandranath Singathi, Ramya Raghunathan, Retheesh Krishnan, Saravana Kumar Rajendran, Sruthy Baburaj, Mukund P. Sibi, Dean C. Webster, Jayaraman Sivaguru
Summary: Photodegradable, recyclable, and renewable crosslinked polymers from bioresources have the potential to address the issue of plastics degradability and recyclability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Biotechnology & Applied Microbiology
Teluka Pasan Galhenage, Shane J. Stafslien, Allen Skaja, Dean C. Webster
Summary: Siloxane-polyurethane hybrid coatings are effective in controlling biofouling caused by freshwater mussels. The coatings showed excellent performance in field trials and have the potential for long-term durability against freshwater mussels. The morphology of the coatings is influenced by the choice of solvent.
Article
Biotechnology & Applied Microbiology
Joseph Dahlgren, Lauren Foy, Kelli Hunsucker, Harrison Gardner, Geoff Swain, Shane J. Stafslien, Lyndsi Vanderwal, James Bahr, Dean C. Webster
Summary: This study assessed the grooming performance of three experimental biocide-free siloxane polyurethane fouling-release coatings. The study found that marine fouling on these coatings can be controlled via grooming without damage or changing the surface properties.
Article
Nanoscience & Nanotechnology
Jackson Benda, Hayato Narikiyo, Shane J. Stafslien, Lyndsi J. VanderWal, John A. Finlay, Nick Aldred, Anthony S. Clare, Dean C. Webster
Summary: This study focuses on fine-tuning the amphiphilic properties of a siloxane-polyurethane (SiPU) coating by adjusting the content of PDMS and PEG in the coating matrix. The addition of surface-modifying amphiphilic additives further enhances the antifouling/fouling-release properties of the coatings. The results show that formulations with higher amounts of these additives exhibit significantly improved fouling-release performance, surpassing that of commercial standard FR coatings.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Applied
Deep J. Kalita, Ihor Tarnavchyk, Sermadurai Selvakumar, Bret J. Chisholm, Mukund Sibi, Dean C. Webster
Summary: A novel monomer, 2-eugenoloxy ethyl vinyl ether (EEVE), was synthesized from a renewable bio-based compound, eugenol. The resulting EEVE-based polymers showed improved properties compared to conventional air-drying alkyd resins, such as higher chemical resistance, hardness, glass transition temperature, and Young's modulus. The incorporation of cyclohexyl vinyl ether (CHVE) further enhanced the performance of the crosslinked networks.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Chemistry, Applied
Deep J. Kalita, Ihor Tarnavchyk, Harjyoti Kalita, Bret J. Chisholm, Dean C. Webster
Summary: A novel cardanol-based polymer was synthesized using carbocationic polymerization, and it was found that these polymers have better performance than commercial reference alkyds during the oxidative curing process, making them suitable for surface coatings.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Materials Science, Multidisciplinary
Daniel Angel Bellido-Aguilar, Maryam Safaripour, Kurt VanDonselaar, Leo-Stanley Chibuike Ndunagum, Dean C. Webster, Andrew B. Croll
Summary: Ice accretion poses a threat to outdoor infrastructure and vehicles at low temperatures and it is difficult to avoid. The use of anti-icing coatings, particularly silicone elastomers, has become popular due to their hydrophobicity, ease of preparation, and low cost. However, the characterization of these coatings is often done using unproven techniques that do not directly relate to their properties. This study investigates the adhesion between glass and ice as well as four PDMS-based elastomers using a combination of shear tests and microscale techniques, revealing differences in energy release rates and interfacial crack dynamics between different interfaces.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Polymer Science
Olena Shafranska, Joseph Dahlgren, Alexander Jones, Janice Tardiff, Dean C. Webster
Summary: This study investigated the use of soybean oils with lower unsaturation than conventional soybean oil as sustainable plasticizers for EPDM rubber compounds vulcanized with peroxide. Different soy-derived plasticizers, including high oleic soybean oil, partially hydrogenated soybean oil, and completely hydrogenated soybean oil, were used to replace part of the petroleum-based paraffinic oil in the EPDM formulations. The mechanical and viscoelastic properties of EPDM rubbers formulated with soy-derived plasticizers were studied and compared with those of PO-based rubber. The results showed that soy-derived plasticizers could partially substitute for petroleum-based plasticizers in EPDM compounds without significant impact on properties, and hydrogenated SBO could increase crosslink density in vulcanized rubber, indicating enhanced peroxide efficiency.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Applied
Deep J. Kalita, Ihor Tarnavchyk, Harjyoti Kalita, Bret J. Chisholm, Dean C. Webster
Summary: A novel vinyl ether monomer from eugenol was copolymerized with cyclohexyl vinyl ether via carbocationic polymerization, and the resulting copolymers were epoxidized to obtain epoxy resins. The cured coatings and films from the epoxidized copolymers showed comparable hardness to coatings from petroleum-based resin, but exhibited better flexibility and higher base resistance. These partially biobased epoxy resins have the potential to compete with petroleum-based resins in coatings applications.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Polymer Science
Ivan Hevus, Dean C. Webster, John McNamara, Nicole G. Ricapito, Stepan Tymoshenko
Summary: The applicability of high-throughput methods allows for rapid screening of novel polyester structures with advanced performance potential, while conducting polyesterification reactions in small-scale film reactors is a quick and effective tool.
JOURNAL OF POLYMER SCIENCE
(2021)