JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Lijing Chen,Jianxin Wu,Yuxin Gu,Liang Liu,Yong Li,Xiaofeng Lin,Wenjing Lin,Lei Ji,Yanhong Peng,Guobin Yi
Acrylate had developed rapidly because of its excellent chemical resistance, high-gloss surface, and weather resistance. However, the poor heat resistance of acrylate limited its application in coatings. To overcome this problem, an organic–inorganic hybrid polymer of zirconium silicone resin (ZSR)-modified acrylate has been successfully synthesized by solution polymerization. The results indicated that the heat resistance of acrylate was significantly improved due to the Si O Si and Si O Zr structures of ZSR and the increased cross-linking density induced by ZSR. After the incorporation of ZSR, the decomposition temperatures of 5% of acrylate increased from 300.4 and 349.2°C. The performance of the ZSR/(P(MMA/BA)) showed no significant change in uniformly heating at 200°C for 24 h. The composite films showed hydrophobicity, with the contact angles increasing to more than 90°. The S4 sample displayed the outstanding comprehensive performance, that is, 5% weight loss at 341.3°C, water contact angle of 97.9°, elongation at break of 852%, and tensile strength of 9.9 MPa. The high-performance heat resistant coating is a promising material for application in architecture, decoration, and mechanical equipment.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·Vol. 65
·期 30
·15885-15893
·
IF 3.9
Yang Binghan,An Wenjie,Zhang Yichun,Lu Quanfang,Yu Jie
Viscosity
index improvers (VIIs) are indispensable polymer additives
in modern lubricating oil formulations. In this work, a one-pot in situ free-radical polymerization strategy is proposed
for the synthesis of poly(lauryl methacrylate-methyl methacrylate-styrene)
(P(LMA-MMA-ST)) terpolymer VII in base oil, eliminating solvent removal
and complex post-treatment steps. The results showed that the maximum
thermal decomposition temperature, glass transition temperature, particle
size, and dispersity of terpolymers are 346 ° C, −33.64
° C, 16 nm, and 2.17, respectively, confirming that the copolymer
has a uniform molecular structure and adequate thermal stability.
The terpolymer exhibits favorable rheological properties in base oil.
At a content of 7.5 wt %, the viscosity index reaches 225 with a pour
point of −29 ° C, and when increasing the content to 9.1
wt %, the viscosity index further improves to 244 without deterioration
of low-temperature performance. The tribological performance shows
that the maximum reduction of the friction coefficient is up to 14.89%.
Compared with other VIIs, the P(LMA-MMA-ST) delivers competitive efficiency.
All the results demonstrated that the base oil-mediated one-pot strategy
has industrialization potential and practical application in the synthesis
of poly(methacrylate)-type VIIs.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 3.1
Jiehao Qu,Jicheng Li,Guang Yang,Nianzhao Gao,Xiangdong Liu
Poly(methyl methacrylate) (PMMA) possesses high optical transparency but suffers from insufficient mechanical strength. Most toughening methods compromise optical clarity, processability, or industrial scalability. Herein, we present a scalable toughening strategy based on copolymerization of methyl methacrylate (MMA) with 2-hydroxyethyl methacrylate (HEMA), combined with transesterification between their units. The resulting random MMA-co-HEMA copolymers retain excellent visible-light transmittance (above 90.0%, 5 mm) while achieving remarkable mechanical enhancements, including increases of 74% in tensile strength and 22% in impact strength compared with linear PMMA. Further studies reveal that the transesterification between HEMA and MMA units induces a lightly cross-linked network. This approach not only offers advantages in simplicity, cost-effectiveness, and compatibility with industrial processes such as casting molding, but also effectively prevents uncontrollable autoacceleration during bulk polymerization. These findings provide new insights for the designing of high-performance optical thermoplastics with promising potential in structural optical applications.
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高影响因子
JOURNAL OF POROUS MATERIALS
·
2019
·Vol. 27
·期 1
·95-105
·
IF 1.947
Xu Xiang,Zeng Yanning,Yu Caili,Zhang Faai
A series of mesoporous SBA-15 with various pore diameter (8, 15, 22 and 27 nm) were synthesized and used as “microreactor”. Reversible addition–fragmentation chain transfer (RAFT) polymerization of methyl methacrylate (MMA) was conducted in the channels of SBA-15 using azodiisobutyronitrile (AIBN) as initiator, ethyl xanthate ethyl propionate as chain transfer agent. The obtained PMMA/SBA-15 composites and neat PMMAs from composites were characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, nitrogen adsorption and desorption, Fourier transform infrared spectroscopy, thermogravimetry analysis, differential scanning calorimetry, hydrogen nuclear magnetic resonance. Results showed that compared with PMMA from conventional RAFT polymerization, PMMAs obtained from internal SBA-15 featured with narrower molecule weight distribution (1.34–1.55) and higher thermal stability due to confinement effects. With the increment of pore size of SBA-15, the molecular weight and glass transition temperature (T g ) of PMMA obtained from internal SBA-15 were distinctly improved whereas isotacticity of the PMMA decreased. The properties of the PMMA were managed with controllable RAFT polymerization by regulation the pore size of SBA-15.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 63
·58218-58225
·
IF 3.289
Henmei Ni,Junxiu Liu,Kai Shi,Min Wu,Yadong Yang,Lijuan Zhang
The reversible addition–fragmentation chain transfer (RAFT) dispersion polymerization of methyl methacrylate (MMA) was carried out in ethanol using polymethacrylic acid (PMAA)–4-cyanopentanoic acid dithiobenzoate (CADB) (degree of polymerization = 30, 122 and 450) as a macro chain transfer agent (CTA) and 2,2′-azobis(2,4-diemthyl valeronitrile) (V-65) as an initiator. In contrast to the random copolymerization systems, a dramatic increase of conductivity during the initial stage of RAFT polymerization was observed. It was confirmed that the conductivity resulted from the charged solvophobic blocks of soluble diblock copolymers, strongly dependent on the chain length of PMAA-CTA and PMMA. Objects of PMAA-b-PMMA were prepared by three methods, i.e. the polymerization-, temperature- and ion-induced self-assembly. The procedure of self-assembly commonly resulted in a dramatic decrease of conductivity. All results indicated that the electrostatic interaction played a role in the process of self-assembly, rather than just the solvophobic interaction of PMMA blocks in ethanol.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2015
·
IF 2.752
Feng Ye,Si Chen,GuoDong Tang,Meng Ma,Xu Wang
Tough and transparent poly(methyl methacrylate) (PMMA) nanocomposites with the impact strength and breaking elongation 1.6 and 9.6 times higher than that of pure PMMA, separately, are obtained through in situ thermal polymerization of methylmethacrylate (MMA) gels with dumbbell-like organogelators (G1-alkyl). G1-alkyl is designed and synthesized with long alkyl chains at the periphery, which can self-assemble into three-dimensional (3D) nanofibrillar gel networks in MMA monomers during the gelation process. PMMA nanocomposites are obtained through in situ thermal polymerization of MMA gels, whose gel networks are well-dispersed in polymer matrix because of the good compatibility and survived after the polymerization process, verified by SEM studies. Mechanical analysis indicates that only a small amount of gelator addition can significantly improve the mechanical properties of the obtained nanocomposites, and the maximum value of impact strength and breaking elongation is achieved with 1.0 wt% gelator concentration. In particular, UV–vis spectrophotometer and Archimedes drainage method indicates the PMMA nanocomposites maintain the advantage of good optical transparency and lightweight.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 51
·期 11
·5113-5121
·
IF 2.302
Chen Mingsen,Sun Fameng,Xu Wangfa,Zhou Li,Zhang Faai
A series of polymerized high internal phase emulsion (polyHIPE) monoliths with internal phase contents varying from 82.5 to 94.0 % were synthesized. The limited spaces of the polyHIPE were used as reactors to polymerize methyl methacrylate (MMA) by reverse atom transfer radical polymerization (RATRP). The main purpose of this research was to investigate the effect of limited spaces of polyHIPE on RATRP polymerization. The monoliths before and after MMA polymerization and PMMA obtained in the polyHIPE were characterized by scanning electron microscopy, gel permeation chromatography, Fourier transform infrared spectroscopy, thermogravimetry analysis, hydrogen nuclear magnetic resonance, and differential scanning calorimetry. The results suggested that the monomer MMA had polymerized in the polyHIPE. Compared with PMMA by RATRP without confined space, the molecular weight, initial thermal decomposition temperature, glass transition temperature ( T
g ), and the isotacticity of the PMMA obtained from polyHIPE were increased significantly and the molecular weight distribution broadened. The increase in the internal phase contents increased the numbers of the cavities and windows, whereas the molecular weight, molecular weight distribution, and T
g of the PMMA obtained from different polyHIPEs did not change much.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2008
·Vol. 10
·期 7
·1052-1055
·
IF 4.186
P. Zhang,H.P. Zhang,G.C. Li,Z.H. Li,Y.P. Wu
We have successfully developed a new process to prepare porous poly(methyl methacrylate-co-acrylonitrile) (P(MMA-AN)) copolymer based gel electrolyte. The porous structure in the polymer matrix is achieved by adding SnO 2 nanoparticles which are mostly used as gas sensor materials. The quasi-aromatic solvent, NMP, has an electron-repulsion effect with the space charge layer on the surface of SnO 2 nanoparticles and forms a special gas–liquid phase interface . Once the cast polymer solution is stored at an elevated temperature to evaporate the solvent, gas–liquid phase separation happens and spherical pores are obtained. The ionic conductivity at room temperature of the prepared gel polymer electrolyte based on the porous membrane is as high as 1.54 × 10 −3 S cm −1 with the electrochemical stability up to 5.10 V (vs. Li/Li + ). This method presents another promising way to prepare porous polymer electrolyte for practical use.
研究领域:
材料科学
·
高分子化学
·
储能技术
·
电化学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2016
·
IF 2.653
Ke Zhang,Honglin Zhang,Ying Wang,Yanqing Tian,Jiupeng Zhao,Yao Li
Fluorinated acrylate polymer has received great interest in recent years due to its extraordinary characteristics such as high oxygen permeability, good stability, low surface energy and refractive index . In this work, platinum octaethylporphyrin/poly(methylmethacrylate- co -trifluoroethyl methacrylate) (PtOEP/poly(MMA- co -TFEMA)) oxygen sensing film was prepared by the immobilizing of PtOEP in a poly(MMA- co -TFEMA) matrix and the technological readiness of optical properties was established based on the principle of luminescence quenching . It was found that the oxygen-sensing performance could be improved by optimizing the monomer ratio (MMA/TFEMA = 1:1), tributylphosphate(TBP, 0.05 mL) and PtOEP (5 μg) content. Under this condition, the maximum quenching ratio I 0 /I 100 of the oxygen sensing film is obtained to be about 8.16, Stern-Volmer equation is I 0 /I = 1.003 + 2.663[O 2 ] (R 2 = 0.999), exhibiting a linear relationship, good photo-stability, high sensitivity and accuracy. Finally, the synthesized PtOEP/poly(MMA- co -TFEMA) sensing film was used for DO detection in different water samples.
研究领域:
生物化学
·
材料科学
·
环境监测
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2015
·
IF 5.056
Yue Cui,Zhi-Kan Yao,Ke Zheng,Shi-Yuan Du,Bao-Ku Zhu,Li-Ping Zhu,Chun-Hui Du
To explore low-pressure-driven nanofiltration (LPDNF) membranes with high permeate flux , a novel preparation route was proposed and investigated. First, an amphiphilic copolymer of poly (methyl methacrylate- co -dimethylaminoethyl methacrylate) (P(MMA- co -DMA)) was synthesized via free-radical copolymerization , and then blended with polyvinyl chloride (PVC) to fabricate precursor membranes via non-solvent induced phase separation (NIPS) process. Utilizing the quaternization and cross-linking reaction between p -xylylene dichloride (XDC) and tertiary amine units in PVC/PMMA- co -DMA precursor membranes, positively charged PVC/PMMA- co -DMA LPDNF membranes were obtained. Element alanalysis, X-ray photoelectron spectroscopy and scanning electron microscopy were employed to characterize the composition and morphology of the membranes. Effects of PMMA- co -DMA content and XDC concentration on the LPDNF membranes’ performance were studied and discussed. With the optimized condition, the NF membrane showed the highest salt rejection ( R ) and water flux ( J ), e.g., R MgCl 2 =89.1%, J MgCl 2 =22.1 L/(m 2 h) and R NaCl =45.1%, J NaCl =27.6 L/(m 2 h) at a pressure of 0.3 MPa. Besides, the rejections of the LPDNF membranes for inorganic salts increased in an order of Na 2 SO 4
研究领域:
材料科学
·
膜技术
·
环境工程
·
高分子化学
·
水处理
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DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Xiangqiong He,Bing Yu,Xiulan Zhang,Hailin Cong
By changing the amount of acrylic acid, different monodisperse poly(styrene-co-methyl methacrylate-co-3-sulfopropyl methacrylate potassium salt-co-acrylic acid) (P(St-MMA-SPMAP-AA)) microspheres are synthesized by soap-free emulsion polymerization . Two-dimensional or three-dimensional PSMSSA colloidal crystals are successfully prepared by the gas-liquid interface assembly method. A noticeable shift of the bandgap of the PSMSSA colloidal crystals is observed at different pH, after the addition of diluted HCl aqueous, a structure color of amaranth is found for the PSMSSA colloidal crystals, and a structure color of blue-green is formed under neutral conditions. By using PSMSSA colloidal crystals on the liquid interface , the colloidal voids are filled with liquid, and its optical and pH-responsive properties can be directly measured without re-transfer, realizing the simple and efficient preparation of pH-responsive colloidal crystals sensors. Compared with the traditional pH sensor, the gas-liquid interface self-assembled colloidal crystals sensor is not only economical and economical, but also a reversible sensor visible to the naked eye.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2013
·
IF 5.008
Miaorong Pan,Yangfei Sun,Jin Zheng,Wuli Yang
In this work, core–shell–shell-structured boronic acid-functionalized magnetic composite microspheres Fe3O4@SiO2@poly (methyl methacrylate-co-4-vinylphenylbornoic acid) (Fe3O4@SiO2@P(MMA-co-VPBA)) with a uniform size and fine morphology were synthesized. Here, Fe3O4 magnetic particles were prepared by a solvothermal reaction, whereas the Fe3O4@SiO2 microspheres with a core–shell structure were obtained by a sol–gel process. 3-(Trimethoxysilyl) propyl methacrylate (MPS)-modified Fe3O4@SiO2 was used as the seed in the emulsion polymerization of MMA and VPBA to form the core–shell–shell-structured magnetic composite microspheres. As the boronic acid groups on the surface of Fe3O4@SiO2@P(MMA-co-VPBA) could form tight yet reversible covalent bonds with the cis-1,2-diols groups of glycoproteins, the magnetic composite microspheres were applied to enrich a standard glycoprotein, horseradish peroxidase (HRP), and the results demonstrated that the composite microspheres have a higher affinity for the glycoproteins in the presence of the nonglycoprotein bovine serum albumin (BSA) over HRP. Additionally, different monomer mole ratios of MMA/VPBA were studied, and the results implied that using MMA as the major monomer could reduce the amount of VPBA with a similar glycoprotein enrichment efficiency but a lower cost.
研究领域:
分析化学
·
材料科学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
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