Article
Polymer Science
Haowen Sun, Kexuan Chen, Yuan Liu, Qi Wang
Summary: The flame retardant EVA composites were prepared by melt blending ethylene vinyl acetate copolymer with expandable graphite (EG), pyrophosphate piperazine (PAPP), and melamine polyphosphate (MPP). The optimal flame retardant effect was achieved with a PAPP/EG/MPP mixture of 2:2:1 mass ratio. EVA composites with an additive amount of 25 wt% reached UL-94 V-0 level (1.6 mm) and had a limiting oxygen index (LOI) of 35.2%. The incorporation of PAPP, EG, and MPP significantly reduced the heat release rate, total heat release, and total smoke release of the composites.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Qi Liu, Dong Feng, Wenbo Zhao, Delong Xie, Yi Mei
Summary: A compounding method based on combining long-chain phosphaphenanthrene (DPP) flame retardant and two-dimensional (2D) black phosphorene (BP) is used to achieve molecule-scale dispersion of a SiP flame retardant in poly(ethylene-co-vinyl acetate) (EVA) matrix. The results show that this method can effectively improve the flame retardant properties and thermal stability of EVA.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Chemistry, Physical
Siyi Xu, Jianxi Li, Qunfeng Ye, Liguo Shen, Hongjun Lin
Summary: This study proposed a strategy to combine aluminum hydroxide and melamine cyanurate with ethylene vinyl acetate to prepare EVA composite materials with high flame resistance. The addition of melamine cyanurate improved the thermal stability and flame resistance of EVA, with the optimal EVA-60-40 composition displaying the best fire resistance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Analytical
Jiali Yan, Yiheng He, Lubin Liu, Xiaoli Li, Wentao Shen, Miaojun Xu
Summary: Efficient flame retardancy and excellent mechanical performance are crucial for the application of ethylene vinyl acetate copolymer (EVA) composites. In this study, a monomolecular intumescent flame retardant, poly (piperazine methylphosphonic acid pentaerythritol ester) (PPMPPE), was incorporated into the EVA matrix. The results showed that the flame retardancy of the EVA composites was significantly improved, and the mechanical performance was well maintained.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Polymer Science
Xuezheng Huang, Chaojun Du, Xixi Chen, Guoqi Li
Summary: In this study, nanocalcined kaolin was added to flame-retardant grade ethylene vinyl acetate (EVA) copolymer using melt blending process, resulting in the preparation of flame-retardant ethylene vinyl acetate nano-composite with high insulation property. The structure, mechanical properties, and electrical properties of the composite were tested and characterized. The results showed that the addition of calcined kaolin reduced the tensile strength and increased the tensile modulus of the composite. Furthermore, the electrical properties exhibited variations with the addition of calcined kaolin, including an increase in breakdown strength and volume resistivity, as well as a decrease and subsequent increase in dielectric loss.
Article
Polymer Science
Ling-Li Jiao, Peng-Cheng Zhao, Zhi-Qi Liu, Qing-Shan Wu, Dong-Qiang Yan, Yi-Lan Li, Yu-Nan Chen, Ji-Sheng Li
Summary: In this study, hydromagnesite was used to synthesize magnesium hydroxide as a flame retardant for EVA. The introduction of magnesium hydroxide significantly improved the flame retardant properties and smoke suppression of the composites. The incorporation of different concentrations of sodium hydroxide had limited effect on the mechanical properties of the composites.
Article
Chemistry, Physical
Jawad Ahmed, Sidra Mushtaq, Mister Adeel
Summary: The study focused on the effects of silanized sepiolite (SP) and electron beam (e-beam) irradiation on the physico-mechanical properties of ethylene-vinyl acetate copolymer (EVA)/ternary polyamide (tPA) composites. Results indicated that silanization and irradiation significantly improved the strength and storage modulus of the composite materials, while slightly decreasing the crystallization temperature.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Polymer Science
Jiajie Yang, Xiaohong Chen, Honglei Zhou, Weichun Guo, Jian Zhang, Zhen Miao, Daihua He
Summary: By compounding expandable graphite and aluminum hypophosphite, flame-retardant ethylene vinyl acetate (EVA) composites were prepared with enhanced combustion performance. Thermogravimetric analysis results showed that AHP and EG promoted the carbonization of EVA to form the char layer, increasing LOI value and the probability to pass UL-94 V-0 rating.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Chemistry, Physical
Jose Hobson, Guang-Zhong Yin, Xiaoli Yu, Xiaodong Zhou, Silvia Gonzalez Prolongo, Xiang Ao, De-Yi Wang
Summary: Rare earth oxide particles have gained significant attention due to their wide diversity of applications. In this study, cerium oxide was incorporated into EVA/MDH composites, resulting in improved flame retardancy, mechanical properties, and anti-ultraviolet aging performance. The addition of CeO2 significantly increased the elongation at break and Young's modulus of the composites, and reduced the peak heat release rate. The combination of CeO2 with MDH improved the filler-polymer interaction and dispersion, leading to enhanced mechanical properties, flame retardancy, and anti-ultraviolet aging performance.
Article
Polymer Science
Shaoquan Li, Xiao-Dong Zhu, Long Li, Yi Qian, Qingjie Guo, Jingjing Ma
Summary: This study successfully synthesized a smoke-suppressant and flame-retardant LDH using fly-ash as a raw material and tested its flame retardant properties in EVA/LDHs composites. The results showed good flame retardancy and smoke suppression effects.
Article
Polymer Science
Qinghong Zhang, Gongliang Wang, Xinlong Wen, Martin Hoch, Jie Mao, Xinyan Shi
Summary: In this study, APTES was used as a crosslinking monomer to graft onto the modified polymer EVM, forming Si-O-Si networks through moisture crosslinking, which increased the modulus and tensile strength of the samples.
Article
Polymer Science
Tiefeng Zhang, Chunfeng Wang, Yongliang Wang, Lijun Qian, Zhidong Han
Summary: In ethylene-vinyl acetate copolymer composites, the synergistic effect between polycarbosilane and magnesium hydroxide significantly improves flame-retardant properties while forming a cohesive and compact char layer.
Article
Materials Science, Composites
Xiaochen Dong, Xuefan Yang, Sen Wang, Kang Wang, Yunqi Zhang, Jichun Liu, Haibo Chang
Summary: Ethylene vinyl acetate copolymer (EVA) was modified with expandable graphite (EG) and polyphosphoric acid (PPA) in melt state. The resulting EVA/EG/PPA composite exhibited improved fire retardancy, thermal stability, processability, and reduced smoke and toxic gas releases. The combination of EG and PPA showed high flame retardant efficiency, with a low loading of 10 wt% achieving a V-0 rating in UL-94 test. The composite also displayed good water resistance and acceptable mechanical property.
POLYMER COMPOSITES
(2023)
Article
Polymer Science
Huimin Zhang, Dan Meng, Wenjia Wang, Hongfei Li, Xiaoyu Gu, Sheng Zhang, Jun Sun, Fei Xin, Zuodong Qin, Wufei Tang
Summary: By grafting phytic acid onto kaolinite and incorporating it with intumescent flame retardant into ethylene vinyl acetate, the flame retardancy of EVA composites is significantly improved. The compact char layer formed during combustion plays a key role in protecting the substrate from further burning.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Brandon L. Williams, Hao Ding, Zaili Hou, Patrick O. Paul, Frank A. Lewis, Andrew T. Smith, Luyi Sun
Summary: A one-pot self-assembled nanocoating of PVA and MMT with well-defined nanostructure was spray coated onto double-walled corrugated cardboard, effectively inhibiting flame spread and improving flame retardancy through the formation of a dense char layer after burning tests.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Kabiru Musa Aujara, Buong Woei Chieng, Nor Azowa Ibrahim, Norhazlin Zainuddin, Chantara Thevy Ratnam
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2019)
Article
Chemistry, Applied
Soo-Tueen Bee, Lee Tin Sin, Nicole Ooi Ker Qi, Chantara Thevy Ratnam, A. R. Rahmat
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2020)
Review
Materials Science, Composites
Jia X. Chan, Joon F. Wong, Azman Hassan, Zurina Mohamad, Norhayani Othman
POLYMER COMPOSITES
(2020)
Article
Engineering, Chemical
Sing Li Ling, Seong Chun Koay, Ming Yeng Chan, Kim Yeow Tshai, Thevy Ratnam Chantara, Ming Meng Pang
POLYMER ENGINEERING AND SCIENCE
(2020)
Article
Polymer Science
N. A. F. Othman, S. Selambakkannu, H. Azian, C. T. Ratnam, T. Yamanobe, H. Hoshina, N. Seko
Summary: A fibrous surface ion-imprinted polymer (IIP) was successfully synthesized for the selective removal of thorium ions from aqueous solution. The polymer was prepared through direct electron beam radiation using thorium as a template. The IIP showed promising removal efficiency and is a potential material for thorium removal applications.
Article
Materials Science, Composites
Prakash Krishnaiah, Sivakumar Manickam, Chantara Thevy Ratnam, M. S. Raghu, L. Parashuram, K. Prashantha, Byong-Hun Jeon
Summary: In this study, polypropylene composites were prepared by reinforcing with short sisal fibers treated with alkali and high-intensity ultrasound, as well as halloysite nanotubes modified with 3-aminopropyltriethoxysilane. The synergistic effect between the surface-treated fibers and the modified nanotubes was evaluated through various characterization techniques. The results showed that the treatments significantly enhanced the interaction between the fillers and the matrix, leading to improved mechanical, dynamic mechanical, and thermal properties of the composites.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2022)
Review
Materials Science, Multidisciplinary
Wong Joon Fatt, Chan Jia Xin, Azman Hassan, Zurina Mohamad, Norhayani Othman
Summary: Wollastonite has the potential to enhance mechanical strength, thermal stability, and flame retardancy in thermoplastic composites, attracting academia and industry attention. Research focuses on the effects of wollastonite incorporation into polymers and its potential applications, particularly in terms of thermal and flammability properties. Further investigation of nano-sized synthetic wollastonite and hybrid wollastonite/nanofillers is suggested for the development of high-performance materials.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Polymer Science
Siti Maznah Kabeb, Azman Hassan, Faiz Ahmad, Zurina Mohamad, Zalilah Sharer, Munirah Mokhtar
Summary: This study investigated the synergistic effects of hybrid nanofillers on the anticorrosion and flame retardancy properties of graphene oxide reinforced epoxy coatings. Testing methods included EIS, Tafel polarization, SST, LOI, and TEM to reveal the improvements in corrosion resistance and burning behavior. The results showed that hybrid nanofillers enhanced the barrier properties of the coatings, leading to better performance in both corrosion protection and flame retardancy.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Obinna E. Ezenkwa, Azman Hassan, Sani A. Samsudin
Summary: The study found that rice husk imparts better reinforcing effect in PP composite than rice husk ash, while MAPP is a better compatibilizer. SEM study indicates that both compatibilizers improved the filler-matrix interfacial adhesion.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Composites
Joon Fatt Wong, Jia Xin Chan, Azman Hassan, Zurina Mohamad, Shahrir Hashim, Jeefferie Abd Razak, Yern Chee Ching, Zaini Yunos, Ridwan Yahaya
Summary: This study investigates the properties of synthetic wollastonite nanofibers reinforced polyoxymethylene nanocomposites. The results showed that the mechanical strength, thermal stability, and flame retardancy of the nanocomposites were improved, indicating their potential use in automotive applications.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Jia Xin Chan, Joon Fatt Wong, Azman Hassan, Norhayani Othman, Jeefferie Abd Razak, Umar Nirmal, Shahrir Hashim, Yern Chee Ching, Muhamad Zaini Yunos, Ridwan Yahaya, T. M. Sampath U. Gunathilake
Summary: The effects of different fillers on the properties of PBT composites were studied. It was found that PBT/SWN had the highest tensile strength and Young's modulus, PBT/GO showed the best wear resistance and anti-friction performance, while PBT/NW had the lowest heat release rate and smoke production rate.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Composites
Joon Fatt Wong, Jia Xin Chan, Azman Hassan, Zurina Mohamad, Shahrir Hashim, Jeefferie Abd Razak, Yern Chee Ching, Muhamad Zaini Yunos, Ridwan Yahaya, T. M. Sampath U. Gunathilake
Summary: Polyoxymethylene (POM) nanocomposites reinforced with synthetic wollastonite nanofibers (SWN) showed improved mechanical, thermal, and flammability properties as the aspect ratio of SWN increased. Higher aspect ratio SWN resulted in increased tensile strength, Young's modulus, and impact strength in POM nanocomposites. However, lower aspect ratio SWN performed better in flame retardancy, with delayed time to ignition and decreased peak heat release rate.
POLYMER COMPOSITES
(2023)
Article
Multidisciplinary Sciences
Ashish Kumar, Azman Hassan, Mohd Yazid Yahya, Abdul Hadi Azman
Summary: The aim of this study was to improve the properties of PLA by blending it with PC using melt blending technique. The effects of TA as compatibilizers and TBATPB as catalyst were investigated. The addition of triacetin and catalyst resulted in the best mechanical properties, confirming the synergistic action promoted the transesterification reaction between PLA and PC, enhancing the compatibility of the PLA/PC system.
MALAYSIAN JOURNAL OF FUNDAMENTAL AND APPLIED SCIENCES
(2023)
Article
Engineering, Multidisciplinary
Muhammad Akmal Ahmad Saidi, Azman Hassan, Mat Uzir Wahit, Lai Jau Choy, Hazleen Anuar
JURNAL TEKNOLOGI-SCIENCES & ENGINEERING
(2020)
Article
Engineering, Multidisciplinary
Syazeven Effatin Azma Mohd Asri, Zainoha Zakaria, Azman Hassan, Mohamad Haafiz Mohamad Kassim
IIUM ENGINEERING JOURNAL
(2020)
Article
Instruments & Instrumentation
Taisei Hayashi, Kensei Ichiba, Daisuke Nakauchi, Takumi Kato, Noriaki Kawaguchi, Takayuki Yanagida
Summary: In this study, Cr-doped Mg4Ta2O9 single crystals with different doping levels were synthesized using the floating zone method, and their photoluminescence and scintillation properties were evaluated. The results showed that Cr-doped Mg4Ta2O9 single crystals exhibited broad emission bands in the near-infrared region and showed scintillation characteristics within specific wavelength ranges. Additionally, the samples with different Cr doping levels demonstrated different lower detection limits based on the dose rate response function.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
S. Marouf, A. C. Chami, Y. Boudouma
Summary: This study develops a Monte Carlo simulation approach to describe proton-induced secondary electron emission in solids. Theoretical modeling based on the Mott's elastic scattering cross-section and Lindhard's dielectric function was used to calculate the double differential cross-section (DDCS) of excited electrons and describe electron transport in the medium. The results for aluminum show the angular and energy distributions of backscattered electrons for incident protons with energy below 25 keV at normal incidence, and the total electron emission yield also agrees well with available measurements.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
Weipeng Yan, Baojun Duan, Zijian Zhu, Yan Song, Guzhou Song, Jiming Ma, Binkang Li, Yucheng Liu
Summary: This article reports on the scintillation performance of Lithium-doped 2D (PEA)2PbBr4 perovskite single crystals synthesized at room temperature. The crystals exhibit fast decay time, high light yield, and high spatial resolution, making them highly promising for medical diagnostic applications.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
S. B. Vishwakarma, S. K. Dubey, R. L. Dubey, I. Sulania, D. Kanjilal
Summary: Investigations have been conducted on the implanted SiO2 thin film after thermal annealing using various analytical techniques. The results revealed the absence of vacancy defects, variations in vibrational modes and the formation of new structures. The photoluminescence intensity of the annealed SiO2 samples was higher, with a decrease in non-radiative defect centers and an increase in radiative Si:SiO2 interface states. Additionally, the presence of silicon nanoclusters formed after annealing resulted in an additional radiative recombination peak. Furthermore, the formation of new SiOx structures was observed after thermal annealing.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
M. Koshimizu, S. Kurashima, A. Kimura, M. Taguchi
Summary: By observing the scintillation time profiles of CeF3 under irradiations of pulsed beams with different LETs, we found that the initial decay was faster for higher LET, which is consistent with previous studies on other self-activated scintillators. This faster decay at higher LET can be explained by the competition between the scintillation caused by 5d-4f transition of Ce3+ ions and quenching due to the interaction between excited Ce3+ ions close to each other.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
Junjie Shi, Jianhong Hao, Fang Zhang, Qiang Zhao, Bixi Xue, Jieqing Fan, Zhiwei Dong
Summary: This study examined the neutralization process and beam quality of a hydrogen beam by emitting negative hydrogen ions to a hydrogen target. The findings showed that the neutralization efficiency was influenced by variables such as the transport distance, energy, and target gas density. However, the maximal neutralization efficiency was not affected by the density of the target gas or the energy of the negative hydrogen ions.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
