FIRE AND MATERIALS
·
2019
·Vol. 43
·期 7
·880-891
·
IF 1.173
You Wu,Anqi Liu,Wulong Li,Zhanxiong Li
Summary A novel carborane acrylate monomer (1-acryloyloxyethyl carborane) was synthesized by addition reaction, hydrolysis, and esterification and characterized by proton nuclear magnetic resonance ( 1 H NMR) spectroscopy and Fourier transform infrared spectroscopy (FT-IR) analysis. Subsequently, the carborane monomer and a phosphate-containing methacrylate monomer were applied on the modification of a silk fabric. The heat resistance and flame retardancy of the silk fabric before and after modification were compared. Energy-dispersive X-ray spectrometer (EDS) and FT-IR showed that carborane monomer and phosphate-containing methacrylate were grafted onto the surface of the fibers. The cross-sectional morphology of silk fabrics after burning was observed by scanning electron microscope (SEM), and the flame-retardant mechanism was analyzed. Thermal-gravimetric analysis (TGA) and differential scanning calorimetry (DSC) analysis revealed that the thermal stability of the modified silk increased with the increase of the grafting yield. The MCC-2 microcalorimeter (MCC) test showed that, when using 1-acryloyloxyethyl carborane as monomer and blending with phosphate-containing methacrylate, the maximum heat release rate (PHRR) of the modified silk fabric decreased from 97.6 W/g (before grafting) to 51.3 and 45.8 W/g, respectively, and the total heat release (THR) decreased from 10.2 kJ/g (before grafting) to 5.9 and 5.2 kJ/g, respectively. The limiting oxygen index (LOI) test revealed that using 1-acryloyloxyethyl carborane and phosphate-containing methacrylate as mixed monomers to modify the silk fabric obtained good flame retardancy, whose LOI value reached 29.8%.
研究领域:
材料科学
·
纺织工程
·
高分子化学
✓ 已验证
DOI
高影响因子
IRANIAN POLYMER JOURNAL
·
2025
·
IF 2.8
Wu Chaobo,Fang Cheng
The increasing global focus on sustainability and environmental protection has driven significant developments in research on waterborne pressure-sensitive adhesives (PSAs). Among these, hexafluorobutyl methacrylate (HFMA)-modified core–shell polyacrylates show great potential as waterborne PSAs but are hindered by limited understanding of HFMA's effect on PSA properties. To address this challenge, we successfully synthesized a series of core–shell polyacrylate latex PSAs using (meth)acrylates as the primary monomer and HFMA as the modifying monomer, employing a monomer-starved seeded semi-continuous emulsion polymerization process. Comprehensive characterizations, including FTIR, XPS, DSC and TEM, confirmed the successful incorporation of HFMA into the latex copolymer and the formation of core–shell structures. Notably, increasing the HFMA content from 0 to 20 wt% significantly reduced the water absorption rate of the latex films from 15 to 4 wt% and decreased the surface tension from 42 to 34 mN/m. Concurrently, the water contact angle and water whitening resistance were greatly enhanced. Additionally, the loop tack and peel strength of the modified PSAs were improved by 81 and 89%, respectively. Furthermore, all PSA samples demonstrated high shear strength (> 72 h) and gel content (> 69 wt%), achieving a remarkable balance between cohesion and adhesion. This work offered a novel approach for designing waterborne PSAs with excellent water whitening resistance and high cohesion, broadening the possibilities for sustainable adhesive applications. Graphical abstract
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
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2021
·Vol. 222
·期 12
·2100074
·
IF 2.527
Xiaohua Li,Yang Xue,Xinyu Ma,Ruiwei Guo
Interchain transfer is an important side reaction in radical polymerization of acrylates and has significant effects on both reaction kinetics and the resulting polymer microstructures. In this study, an effective method for direct determination of the interchain transfer constant ( C tr ) is established via the combination of RAFT polymerization of a monomer in the presence of another prepared polymer and subsequent separation using polymer chromatography. The C tr of benzyl acrylate (BzA) to poly(ethyl acrylate) (PEA) is determined with benzyl N -carbazole dithiocarbamate (BCBD) as the RAFT agent and the effects of polymerization recipe, such as BzA/BCBD mole ratios, BzA/PEA mass ratios, and solvent amounts on C tr determination investigated. The results indicate that interchain transfer reactions show clear short chain radical effects in early stage of RAFT polymerization and the experimental recipes have little influence on the determination. The C tr values are in the range of 1–2 × 10 −4 at 90–120 °C and the activation energy of C tr at 47.8 kJ mol −1 .
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2016
·
IF 1.272
Na Han,Sumei Chen,Guo Chen,Xuefeng Gao,Xingxiang Zhang
We report the preparation and performance of poly(acrylonitrile-methacrylate) (AN-MA) flat-sheet membranes with various MA feeding ratio via thermally induced phase separation, in which the membrane forming system consisted of AN-MA, ethylene carbonate (EC), and triethyl citrate (TEC). The effects of the preparation conditions, such as the MA feeding mole ratio, EC content in the mixed diluent, and AN-MA concentration on the pore structure, porosity, water flux, and mechanical properties of the AN-MA membranes were studied. The poly(acrylonitrile-methacrylate) (AN-MA mole ratio 85/15, 80/20, 75/25) copolymers were synthesized by emulsion polymerization. The AN-MA copolymers are melt processable in the temperature range of 130–180°C. The morphology of the resulting membrane gradually changes from a typical bicontinuous structure to a cellular structure upon increasing the polymer concentration and EC content in the mixed diluent. The water flux of AN-MA microporous membranes increased and subsequently declined as the MA feeding molar ratio increased in the polymerization system. In addition, the mechanical properties of the AN-MA membranes increased gradually. Consequently, the properties of the AN-MA membranes were optimal when the MA feeding molar ratio was 20 mol%. Correspondingly, the membrane exhibits a relatively high water flux (66.0 L/(m2 h)) and porosity (75%) when the ternary system contains 60 wt.% EC in the mixed diluent and 9 wt.% 80/20AN-MA. In addition, the membrane exhibits a higher tensile strength (4.6 MPa) and elongation (43.8%).
研究领域:
材料科学
·
化学工程
·
膜技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2014
·Vol. 21
·期 3
·1-11
·
IF 1.897
Zhang Rui,He Xianru,Huang Guangsu
In this paper, the changes in dynamics of Poly (butyl acrylate) (PBA) and Poly (ethyl acrylate) (PEA) after introducing internal double bonds (through copolymerizing with isoprene (IP)) were studied through sight of fragility theory. The dynamic fragility was determined. And the result shows that dynamic fragility indexes of PBA-co-IP and PEA-co-IP are smaller than PBA and PEA. Furthermore, the scaled dynamic mechanical spectra show that PBA-co-IP and PEA-co-IP have longer length of glass–rubber transition region. In one side, our work is well fitted to the universal theory that smaller fragility leads to longer soft dispersing in glass–rubber transition region. In the other side, adding internal double bonds is an effective way to weak fragility of polymers, which results in a broader transition region.
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Yafang Han,Ziyang Gong,Renjie Zhou,Weile Li,Jun Shi,Jiwen Hu
In modern industrial applications, achieving strong adhesion to low surface energy materials, such as polyethylene, polypropylene, and polytetrafluoroethylene, is a significant challenge. This is primarily due to their inherent chemical inertness and weak interfacial interactions. To address this challenge, this study developed a novel pressure-sensitive adhesive with an interpenetrating network (IPN) structure. This was achieved by synthesizing linear polyethylene glycol-based polyurethane acrylate (PUA) oligomers and combining them with polyacrylate pressure-sensitive adhesives (PSA) to form the IPN structure. By adjusting the content of PUA, the viscoelasticity, mechanical, thermal, and adhesive properties of the PSA-PUA system were successfully optimized. The results demonstrate that the PSA-PUA20 exhibits excellent adhesion performance on polyethylene(PE) substrates, with a peel strength of 364.75 N/m and a loop tack of 4.03 N. Compared to polyacrylate pressure-sensitive adhesives (PSA), these values represent increases of 240.25 % and 46.58 %, respectively. Additional lap shear tests further confirmed that the PSA-PUA20 enables cyclic adhesion on polytetrafluoroethylene (PTFE) substrates. A mechanistic analysis reveals that the incorporation of PUA alters the surface energy of the adhesive, improving its spreading properties on low surface energy materials. Additionally, it strengthens the hydrogen bonds and van der Waals forces between molecular chains, significantly improving the cyclic shear performance and adhesion performance on low surface energy substrates. Furthermore, the PSA-PUA adhesive exhibits excellent antioxidant and thermal stability, offering a promising solution for the design of high-performance PSAs.
研究领域:
材料科学
·
高分子化学
·
工业应用
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Pengfei Tang,Zhiqiang Wang,Chao Wen,Chuantao Yin,Yuxian Xing,Haoming Tai,Feng Jiang
With the increasing concern about global environmental issues, reducing the carbon footprint to achieve carbon neutrality has been particularly important. Sustainable multiblock copolymer elastomers (MBCPEs) have received tremendous interest due to their unprecedented performance and huge potential applications. However, complex multistep polymerization and postpolymerization processes are needed to design MBCPEs. In this work, a series of MBCPEs, in which vanillin acrylate (VA) derived from lignin was selected as the renewable rigid segments for the glassy block, while methyl acrylate (MA) was chosen as the soft segments for the rubbery block, were prepared by two successive reversible addition–fragmentation chain transfer (RAFT) polymerization processes with polytrithiocarbonate (PTTC). These thermally stable MBCPEs exhibit distinct microphase-separated morphology, where the hard poly(vanillin acrylate) (PVA) blocks self-assemble into discrete glassy domains serving as the physical cross-linking points in the soft poly(methyl acrylate) (PMA) matrix. The macroscopic mechanical performance, such as tensile strength, stretchability, toughness, and elastic recovery, can be adjusted well by changing the molecular weights and PVA contents. Moreover, these sustainable MBCPEs can be applied as strong adhesives and excellent UV-shielding materials, broadening their potential applications. This novel strategy is convenient and robust by combining RAFT polymerization and renewable resources toward high-performance MBCPEs, which can open a new avenue for the development of sustainable biobased elastomers.
研究领域:
材料科学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2018
·
IF 5.651
Chunhong Li,Hang Xiao,Xianfeng Wang,Tao Zhao
The energy consumption and environment pollution play an important role to the sustainable development in the dyeing and finishing industry. The aim of this study is to synthesize a series of acrylated epoxidized soybean oil based UV-curable polyurethane pigment adhesives and to reduce the consumption of energy and environment pollution in pigment printing process. The chemical composition was evaluated using fourier transform infrared spectra and nuclear magnetic resonance hydrogen spectroscopy. The thermal properties of UV-cured films were discussed by thermalgravimetric analysis (TGA) and differential scanning calorimetry (DSC). In addition, the effects of AESO content on particle size, water swelling properties and contact angles of the emulsions and films were investigated. Furthermore, the color yield, the rubbing fastness and washing fastness of the printed fabrics with acrylated epoxidized soybean oil based UV-curable polyurethane as adhesive were evaluated. The application of vegetable oil-based urethane acrylate pigments of cotton fabrics is a cleaner method that can reduce the consumption of energy and environment pollution. Compared to conventional thermally curable coatings, the UV-curable vegetable oil-based urethane acrylate pigment prints adhesive does not require a large amount of water and energy, indicating that vegetable oil-based urethane acrylate pigments have potential application in the cleaner production of textile industry .
研究领域:
纺织化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Shuqing Zhang,Zhidong Liu,Ruxiang Liu,Li Du,Li Zheng,Zhiyuan Liu,Kaiming Li,Meng-Chang Lin,Yinghui Bian,Mian Cai,Huiping Du
Rechargeable aluminum batteries are of interest owing to the nonflammability of Al metal anode and the ionic liquid electrolytes together with the low cost and high capacity of Al metal anode. However, the ionic liquid electrolytes are also moisture sensitive and highly corrosive, bringing about irreversible activity loss, undesired gas production and destructive leakage corrosion, which thus hinder the practical application of rechargeable aluminum batteries . Herein, a gel polymer electrolyte is designed via in-situ cross-linking polymerization of ethyl acrylate (EA) monomer and pentaerythritol acrylate (PETEA) crosslinker in high molar ratio of AlCl 3 /1-ethyl-3-methylimidazolium chloride (EMIC) ionic liquid. This gel polymer electrolyte exhibits an ionic conductivity of 1.46 × 10 −3 S cm −1 , a wide electrochemical window up to 3.0 V (vs. Al), alleviated moisture sensitivity and appreciable interfacial stability at room temperature . The assembled solid-state Al//graphite batteries with the gel polymer electrolyte deliver stable capacities of ∼90 mAh g −1 for 1000 cycles at the current density of 100 mA g −1 at both ambient temperature and −10 °C. Even with high-loading graphite cathode of 11 mg cm −2 , capacities of ∼60 mAh g −1 can still be obtained for 300 cycles. This work provides a promising strategy for developing reliable and flexible rechargeable aluminum batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 85
·53871-53877
·
IF 3.108
Zewen Yang,Yanyan Zhang,Feiya Fu,Xiangdong Liu
Cotton fabrics with single-faced flame resistance are successfully fabricated through a simple mist copolymerization process using pentabromobenzyl acrylate (PBBA) as the functional monomer. The co-monomers are methyl acrylate (MA), which can react with the hydroxyl groups of cellulose by transesterification, and divinyl benzene (DVB), a cross-linker. SEM images indicate that a very thin copolymer layer (the thickness is about 200 nm) was formed on the cotton fiber surface and the flame resistance tests show that the modified fabrics have an improved flammability with longer time to ignition (TTI), lower peak heat release rate (PHRR), lower total heat release (THR), and lower average mass loss rate (AMLR), when compared to the original cotton fabric. The modification also results in good wearing durability because the flame-retardant coating was covalently linked to the cotton fabric surface by many ester groups. Moreover, desired cotton characteristics such as tensile strength, water absorbency, vapor permeability and flexibility are mostly retained because the mist method gives a single-faced modification of the cotton fabrics.
研究领域:
纺织科学
·
材料化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2013
·
IF 1.848
Xiaofeng Wang,Bibo Wang,Weiyi Xing,Gang Tang,Jing Zhan,Wei Yang,Lei Song,Yuan Hu
A novel melamine-based hyperbranched polyphosphonate acrylate (MHPA), successfully synthesized via the Michael addition polymerization of 2-(2-amino-ethylamino)-4,6-bisethylamino-1,3,5-triazine with tri(acryloyloxyethyl) phosphate, was blended with the epoxy acrylate (EA) to prepare UV-cured flame retardant coatings. The study of their flammability revealed that MHPA can improve the flame retardancy and the sample with 45 wt% MHPA (EA3) showed a good intumescent behavior when combusted. The results of their thermal degradation displayed that MHPA had a dual effect on the thermal stability of EA: leading to its earlier degradation catalyzed by acidic species from the relatively weak phosphorus-bearing parts, but improving the thermal stability of the char layer at high temperature due to the formed intumescent phosphorus–carbon compounds. Besides, the total release amount of gas products of EA3 was much lower than that of pure EA and various flammable gases like hydrocarbons and highly toxic CO were also reduced
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
·
2021
·Vol. 139
·期 16
·51988
·
IF 3.125
Ye-xi Zhou,Qing-xia Yuan,Shu-ling Gong
The high molecular weight polyacrylate self-emulsifying emulsion with 20% hydroxyl monomer and 50% solid content was prepared. Waterborne polyester was used to modify the acrylate resin. Besides acrylic acid (AA) and methacrylic acid (MAA), poly(ethylene glycol) methyl ether methacrylate (PEGMEMA) was also used as functional monomer to stabilize the polymerization process and improve the properties of the emulsion. The effects of the amount of waterborne polyester (WP), ammonium persulfate (APS), poly(ethylene glycol) methyl ether methacrylate (PEGMEMA), methacrylic acid (MAA)/acrylic acid (AA) monomer ratio, butyl acrylate (BA)/styrene (St) monomer ratio on the molecular weight, particle size, viscosity, storage stability, and cured film properties of the polyacrylate emulsion were investigated. The average molecular weight of the modified polyacrylate was up to about 2.5 × 10 4 g mol −1 . The emulsion remained stable after 6 months at room temperature. Transmission electron microscope (TEM) images showed that the latex particles had core-shell structure. The films cured with melamine formaldehyde (MF) resin showed excellent water resistance, adhesion, and hardness.
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）