ACS Omega
·
2020
·
IF 2.87
Yongxin Wang,Tongtong Duo,Xingmin Xu,Zhihong Xiao,Airong Xu,Rukuan Liu,Chaobo Jiang,Junning Lu
Poly(methyl methacrylate) (PMMA) is a thermoplastic polyester with excellent properties such as lightweight, low price, biocompatibility, and so on. However, its extensive utilization is restricted by the deficiencies of brittleness and poor mechanical properties. In this study, high-performance PMMA films enhanced by methylcellulose (MC) were fabricated by a simple procedure at ambient temperatures. The effects of PMMA/MC mass ratio and thermal compression treatment on mechanical properties (tensile strength and elongation) were systematically investigated. The PMMA/MC films showed remarkably enhanced mechanical properties compared with neat PMMA. The tensile strengths of the PMMA/MC (3:97) and PMMA/MC (1:1) films are higher than that of the PMMA/MC (9:1) film by about 471 and 83%, respectively. The mechanical properties were also improved after thermal compression treatment. Importantly, the PMMA/MC films could be recovered and reused. In addition, the morphologies, crystalline state, and chemical structures of the films were investigated by scanning electron microscopy, X-ray diffraction, and 13C NMR spectroscopy. The films are expected to be used as sustainable and potential alternatives to petroleum-based polymer film products because of their simple preparation procedure, high-performance mechanical properties, excellent recycling, eco-friendly features, and scale manufacture.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMER ENGINEERING
·
2018
·Vol. 38
·期 8
·811-818
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IF 0.778
Hongyan Li,Cong Sun,Ruyi Li,Yongqiang Fu,Limeng Song,Aiwu Yang,Hongli Liu
Silica aerogel (SA)/polymethyl methacrylate (PMMA) composites were prepared through electrostatic interaction, which could form phase interface. The effects of electrostatic interaction phase interface on the performance of the composites were studied. The SA/polymer hybrid composites were prepared because of the negative charges in SA and the positive charges in polymer. Characterizations of the SA, polymer, and composites were performed using Fourier transform infrared spectroscopy, scanning electron microscopy, transmittance, gel permeation chromatography, differential scanning calorimetry, zeta potential, and so on. The results indicated that SA has negative charges, whereas the polymer has positive charges; thus, the polymer was absorbed on the surface of the SA skeleton to form an electrostatic interaction phase interface. The composites achieved better transmittance than that of SA/PMMA with the electrostatic interaction phase interface.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2013
·
IF 2.112
Mengwei Dai,Yun Wang,Maozhi Pan,Shaohui Lin,Garry L. Rempel,Qinmin Pan
Single layer coatings were prepared with poly(methyl methacrylate)/polystyrene nanoparticles blend by spin-coating, demonstrating excellent antireflection performance after selective removal of polystyrene particles. The thickness, refractive indices and surface roughness of the coatings, which significantly affect their optical performance, can be modulated by the coating conditions. The particle size can be well controlled by the operational conditions for the particle synthesis. The surface microscopic roughness of the coating strongly affects its light transmittance and the dimensionless parameter, roughness/wavelength ratio, dominates the deviation of the real transmittance from the theoretically predicted transmittance. By optimizing the reaction and the film preparation conditions, the transmittance of antireflection coatings can be up to 99.17% in the visible light range. Compared with work previously reported in the literature, the transmittance in the visible light range can be significantly improved via surface roughness modification, which was generally a problem, especially at the short wavelength region.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2013
·
IF 1.913
Chao Shi,Yingchun Zhu,Huofei Qian,Liqiang Lu
The strong inorganic–organic composite was successfully fabricated by combination of the super stiff silicon nitride (Si 3 N 4 ) fibers and the leading flexible poly(methyl methacrylate) (PMMA) by initiating free radical polymerization in batch. Hydroxylation of Si 3 N 4 fibers made it feasible to modify the fibers with γ-methacryloxypropyltrimethoxysilane (γ-MPS), which was identified as linkage between Si 3 N 4 and PMMA through C C bond. The Si 3 N 4 –PMMA composite had a reduced modulus of 4.72 GPa, with the improvement of at least 52% to the matrix. The observation on morphology and structure of the composite demonstrated that the inorganic fibers were uniformly dispersed in the polymer matrix, and most importantly, they were well cross-linked by chemical bonds and van der Waals. The thermal stability of Si 3 N 4 –PMMA was raised with an increase in thermal decomposition and glass transition temperature. The composite with super mechanical properties and thermal stability may have potential applications in aerospace industry and civil engineering fields.
研究领域:
材料科学
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复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 2
·1137-1144
·
IF 11.806
Wu Qingxiang,Feng Zunpeng,Cai Ziming,Lan Chuwen,Xu Jianchun,Bi Ke,Hao Yanan
In order to improve the energy storage density of poly(methyl methacrylate)-based (PMMA) flexible film dielectric capacitors, the ferroelectric phase poly(vinylidene fluoride) (PVDF) is introduced. Firstly, a blended structured PVDF doped PMMA composites is prepared and the polarization strength is apparently enhanced. However, the breakdown strength has been sacrificed due to the large amounts of defects caused by the different phases blending. To eliminate the influence of the blended structure on the breakdown strength, we designed a double-layer structure prepared by hot pressing at the temperature near the melting point of the polymers. The interfacial bonding of the composite films is controlled well to achieve high breakdown. Finally, a discharge energy density of 14.13 J/cm 3 is obtained at a high electric field of 700 kV/mm in the double-layer structured PMMA and PVDF composite films, which is one times larger than that of pure PMMA films and 6 times larger than that of commercially available biaxially oriented polypropylene (BOPP) capacitors. In addition, the energy efficiency maintains up to 75% at 700 kV/mm. This work provides an effective approach for improving the energy storage density performance of polymer-based capacitors. Graphical abstract A double-layer structure was prepared by hot pressing at the temperature near the melting point of the polymers. In the composite, the discharge efficiency maintains around 75% at high-field electric and the energy storage density can reach 14.13 J/cm 3 , which is much larger than others composite.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 131
·期 22
·
IF 1.64
Haicun Yang,Hongting Pu,Fanghong Gong
Poly(methyl methacrylate) (PMMA) was bonded on the surface of attapulgite (ATP) by using an ammonium persulfate amine redox initiation system via grafting from approach. ATP was modified with (3-aminopropyl)triethoxysilane to anchor amine groups on the surface, and then the amine-functionalized ATP was further treated with methacryloyl chloride and 4,4′-azobis(4-cyanovaleric acid) to give methacryl- and azo-functionalized ATP, respectively. Subsequently, surface-initiated graft polymerization of MMA in a soap-free emulsion was performed to afford ATP/PMMA hybrids. Meanwhile, graft polymerizations on the surface of methacryl- and azo-functionalized ATP were carried out for comparison. The grafting of PMMA on the surface of ATP was characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis (TGA). The crystal structure of hybrids was characterized by X-ray diffraction analysis. The morphology of hybrids was observed by scanning electron microscopy and transmission electron microscopy. The degree of grafting obtained from surface-initiated graft polymerization in a soap-free emulsion was found to be the greatest (29.4%) estimated from TGA. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 41062.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2014
·Vol. 16
·期 30
·15941-15947
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IF 4.198
Shuo Feng,Yuenan Chen,Biyun Mai,Wanchu Wei,Caixia Zheng,Qing Wu,GuoDong Liang,HaiYang Gao,FangMing Zhu
Surfactant-free nanospheres and latex nanospheres of poly(methyl methacrylate) (PMMA) with diameter ranging from 20 to 220 nm are prepared by atom transfer radical polymerization (ATRP) in microemulsions and subsequent dialysis against deionized water. The glass transitions of these PMMA nanospheres are characterized using nano differential scanning calorimetry (nano-DSC) in aqueous dispersions. The glass transition temperature (Tg) of the surfactant-free PMMA nanospheres and nonionic PMMA latex nanospheres with diameters below 150 nm is less than that of the PMMA bulk, and Tg decreases with the decrease of the diameter. In contrast, Tg of the anionic PMMA latex nanospheres is size-independent and is near to that of the PMMA bulk. The influence of the environment surrounding the PMMA nanospheres on glass transitions as well as comparisons to our prior studies with polystyrene (PS) nanospheres in aqueous dispersions are discussed.
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY
·
2015
·
IF 3.469
Wei Zhou,Moo-Chin Wang,Xiujian Zhao
Poly(methyl methacrylate) (PMMA) doped with various amounts of the organic-dye 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) for luminescent solar concentrator (LSC) applications have been studied. The maximum wavelength of the emission peaks increases from 555 to 561 nm as the doped amount of organic-dye DCJTB increases from 2.08 (sample L3) to 8.33 mg (sample L5), which reveals a slight red-shift effect. The difference between the maximum wavelengths of the absorption and emission spectra ( λ s ) decreases from 58 to 47 nm as the doped amount of organic-dye DCJTB increases from 2.08 to 8.33 mg, which shows the Stokes shift. The short circuit photocurrent ( I sc ) increases from 11.68 to 14.11 mA/cm 2 as the doped amount of organic-dye DCJTB increases from 0 (undoped, sample L0) to 8.33 mg. The optical efficiency ( η opt ) also increases from 41.67% to 60.00% as the doped amount of organic-dye DCJTB increases. The maximum value of the incident photon-to-current conversion efficiency (IPCE) was about 9.0% at 526 nm when doped with 8.33 mg of organic-dye DCJTB (sample L5). The results of the present paper show through a well-conducted study on the optical properties of PMMA doped with organic-dye DCJTB that it can be suitable for LSC applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2015
·
IF 3.512
Man Zhang,Rui Wang,Tao Xiang,Wei-Feng Zhao,Chang-Sheng Zhao
In this study, poly(sodium p-styrenesulfonate)/poly(methyl methacrylate) particles were facilely prepared by in situ cross-linked polymerization followed with a liquid–liquid phase inversion technique. The particles exhibited selective adsorption for cationic dyes due to the negatively charged sulfonic groups. The intra-particle diffusion process was the rate-limiting step for the adsorption of methylene blue. More than 90% of cationic dye was removed by the adsorption column of the particles after three circulations. The particles could be facilely fabricated and industrially used for wastewater treatment.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTEGRATED FERROELECTRICS
·
2021
·
IF 0.836
Meichun Ding,Chenwei Li
The cellulose nanocrystals (CNC)/Poly (methyl methacrylate) (PMMA) composite membranes were prepared by the solution casting method. The POM and SEM images indicated that the dispersibility of the composite membranes with chemical modification was better than that with physical modification. Moreover, the glass temperature of the composite membranes with chemical modification reduced remarkably compared to the neat PMMA. The mechanical properties characterization drew the same conclusion as the results of DSC. TGA results showed that the thermal properties of the nanocomposites have been enhanced due to hydrogen bonding interactions between the hydroxyl groups of CNC and the carbonyl groups of PMMA.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 44
·e53074
·
IF 3.057
Wang Xie,Yuan Liu,Mingming Yu,Ren He,Qi Wang
Copolymerization of methyl methacrylate (MMA) with flame retardant monomer is considered to be the most promising method for the preparation of transparent flame retardant poly (methyl methacrylate) (PMMA). However, the mechanical strength and heat resistance of the obtained flame retardant copolymers aren't satisfactory. In this work, the organic–inorganic hybrid PMMA copolymer is designed and synthesized by the ternary copolymerization of MMA, octavinyl silsesquioxane (V-POSS) and phosphorus-containing flame retardant monomer (DEP). V-POSS hardly affects the transparency and flame retardancy of the copolymer, but can significantly improve the thermal stability and mechanical properties. When 0.4 mol% V-POSS is copolymerized, the hybrid copolymer shows limiting oxygen index, heat release rate and visible light transmittance equivalent to the copolymer containing only DEP unit, and the initial decomposition temperature, storage modulus, flexural strength and impact strength are increased by 13°C, 21%, 11% and 23% respectively because of the cross-linking structure and the enhancement of inorganic nanoparticles. This study illustrates the reinforcing and flame retardant effects of hybrid copolymers, and provides a novel strategy for the preparation of high-performance flame retardant plexiglass.
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PAPERS
·
2023
·Vol. 77
·期 7
·3713-3726
·
IF 2.2
Xue Tao,Wei Yan,Yu Caili,Zhou Zhongqun,Zhang Faai
A series of mesoporous silica (MS) materials, including rod-like and spherical SBA-15, spherical MCM-41, and MCM-48, was successfully synthesized and modified by silane coupling agent γ-aminopropyltriethoxysilane. The modified MS was utilized as a microreactor for solution reversible addition–fragmentation transfer (RAFT) polymerization of methyl methacrylate (MMA) using xanthate as a chain transfer agent and azodiisobutyronitrile as an initiator. Notably, modified MS had a low specific surface area and pore volume while maintaining the original morphological structure. Given to the confinement effects, poly(methyl methacrylate) (PMMA) prepared from internal mesoporous channels had higher molecular weight and initial thermal decomposition temperature than those from conventional RAFT polymerization. Moreover, PMMA obtained from spherical SBA-15 and modified MCM-48 exhibited the highest molecular weight ( M n = 8.78 × 10 4 and M n = 7.43 × 10 4 , respectively). This work provided a novel approach in designing a polymer microstructure for a more comprehensive application, such as in drug release. Graphical abstract
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）