JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Shi Chengyu,Li Nan,Yuan Qisong,Liu Tao,Cao Qingyuan,Qian Hanqi,Jiang Bo,Wang Jiazhi,Yu Xiangtao
Developing epoxy structural adhesives with excellent high-temperature adhesion remains a great challenge. The incorporation of fillers can enhance the performance of epoxy adhesives, albeit at the expense of reduced high-temperature adhesion properties. Polyhedral oligomeric silsesquioxanes (POSS) is considered a promising filler for enhancing high-temperature adhesion properties due to its excellent compatibility and nano cage-structured. Herein, the rigid cage-structured was covalently introduced epoxy adhesives to improve the high-temperature adhesion properties. The introduction of 1 wt% POSS significantly increased the high-temperature (120°C) adhesion strength by 197% and toughness by 283%. The POSS-reinforced adhesive also featured excellent wide temperature adaptability, indicating that it maintained high adhesion strength at various temperatures. Furthermore, POSS drastically enhanced the transparency of epoxy adhesive by three times. It is highly anticipated that this work will open a new avenue of designing epoxy adhesives with the excellent high-temperature adhesion properties and transparency.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yun Wang,Heng Li,Jinming Li,Wei Zhang,Chengwei Wu
Repairing and regenerating articular cartilage remains a significant challenge, primarily due to its limited self-healing capability. Hydrogel has emerged as a promising candidate due to its resemblance to extracellular matrices. A porous hydrogel of an appropriate size can facilitate cell growth and integrate into the host tissue. However, the presence of pores in hydrogels will significantly reduce mechanical properties, posing challenges in replacing the load-bearing function of articular cartilage. Here, a porous hydrogel was prepared through a gas forming method based on a triple-network hydrogel system of poly(vinyl alcohol) (PVA)-polyacrylamide (PAM)-agarose (AG), with a pore size of 100–200 μm. The hydrogel exhibits a compressive modulus of up to 0.79 MPa and a tensile modulus of up to 0.35 MPa, falling within the reference range of articular cartilage. Furthermore, the porous hydrogel exhibits good creep resistance properties. These results suggest that the porous hydrogels with strong mechanical properties hold promise as a replacement material for articular cartilage.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Xiaofei Yan,Zhaoyang Gao,Yehua Shao,Dongming Qi,Bei Wu,Shirong Guo
The frequent occurrence of respiratory infectious diseases has made it difficult for traditional antibacterial materials to meet practical needs in recent years. There was an urgent need to develop new antimicrobial materials with stronger antimicrobial effects and biosafety. In this paper, the carboxymethyl chitosan (CMCTS)/silk fibroin (SF) composite microspheres were synthesized through self-assembly, and the Ag + /CMCTS/SF composite microspheres were prepared by loading the Ag + onto their surface. It investigated the effect of CMCTS contents, SF on the size and secondary structure of CMCTS/SF composite microspheres, and the antibacterial activity and mechanism of Ag + /CMCTS/SF composite microspheres. The results showed that the average particle size distribution size of CMCTS/SF composite microspheres was ranged from approximately 593–1115 nm. When CMCTS was added at 50 wt%, the content of β -sheet structures in silk fibroin microspheres was the largest at 38.6%. And the CMCTS/SF composite microspheres loaded with Ag + enhanced the bactericidal rate against Escherichia coli and Staphylococcus aureus by 27.51% and 36.39%, respectively. In addition, the Ag + /CMCTS/SF composite microspheres have high biological safety, providing a new method for designing an efficient, green, and safe composite antibacterial agent.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Yuhua Liu,Wenyan Liu,Shuqing Wei,Yuhao Yue,Lei Dong,Liangmin Yu,Guangling He
In order to reduce the release of volatile organic compounds (VOCs), it is of great practical significance to develop water-based self-polishing antifouling coatings instead of traditional acrylic self-polishing antifouling coatings. However, when preparing film forming matrix resin emulsions for water-based antifouling coatings, the use of emulsifiers in large amounts causes film-forming defects and poor adhesion. Herein, soap-free emulsion polymerization is utilized to prepare resin emulsions by copolymerization of hydrophilic monomers, lipophilic monomers and polymerizable hydrophilic ionic monomers. The hydrophilic structure can give the water-based polymer self-emulsification function to maintain the stability of the emulsion and can promote the fusion between the latex particles by forming hydrogen bonds and coordination bonds, and its connection with the pigments and fillers in the coating can also promote the excellent film formation of the coating. The experimental results show that the water-based self-polishing antifouling resin emulsion has good storage stability and compatibility with the pigments and fillers. The coatings formulated using this emulsion as the film-forming matrix firmly adhered to substrates and displayed satisfactory antifouling performance even after being exposed to a real sea environment for 18 months. This study presents a simple approach for the development of water-based resin emulsion with good storage stability and good water-based self-polishing marine antifouling coatings.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Zhixiang Yan,Huiting Yang,Shuo Zheng,Zhiyong Tan
Enhancing the dielectric properties of polymer materials plays a crucial role in reducing the volume, weight, and cost of dielectric capacitors. In this work, polyurethanes (PUs) for high dielectric performance were fabricated using poly(tetramethylene ether glycol) (PTMG) and polycarbonate diol (PCDL) as soft segments and hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), 4,4′-diphenylmethane diisocyanate (MDI), and toluene diisocyanate (TDI) as hard segment components. The effects of the type and chemical structure of diisocyanate on the microphase separation, crystallization, dielectric properties, and mechanical properties of PUs were investigated. Within the frequency range of 10 −1 –10 5 Hz, MDI-PU exhibited the lowest conductivity (7.32 × 10 −9 S·m at 10 −1 Hz) and the smallest dielectric loss (0.014 at 10 3 Hz), demonstrating excellent insulation properties. This was because the aromatic hard segments of MDI were more rigid, resulting in a tighter molecular arrangement, which facilitates the reduction of polarization loss and charge migration. In addition, the crystallinity and dielectric constant of HDI-PU were higher than those of IPDI-PU, MDI-PU, and TDI-PU. This study demonstrates the deep influence of different diisocyanates on the properties of polyurethanes, revealing the importance of hard-segment structure, crystallinity, and polarization processes in modulating the dielectric properties.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 31
·e55734
·
IF 2.7
Yeyun Meng,Shengyuan Liang
A green method to synthesize self-matting waterborne polyurethane acrylic hybrid emulsion with hydrophobic function is introduced in this study. A reactive waterborne polyurethane (RWPU) dispersion containing unsaturated CC double bonds was prepared from epoxidized soybean oil. Subsequently, the RWPU dispersion was copolymerized with fluorinated monomers of different carbon chain lengths to prepare polyurethane acrylic hybrid emulsion (PUF). The results revealed the gloss levels of PUF films to be as low as 12.4 gloss units at 60°. The morphology of PUF films was observed by scanning electron microscope and three-dimensional surface profilometer, and the relationship between surface roughness and gloss was discussed in detail. In addition, thermal gravimetric analysis was conducted to determine the thermal stability of the PUF films, and the results denoted that these PUF films exhibited excellent thermal stability. Comprehensive performance tests indicated that the RWPU dispersion, which was copolymerized with hexafluorobutyl methacrylate at a weight of 10%, exhibited a low gloss, a high contact angle of 120°, and a high elongation percentage of 423%. Furthermore, the dynamic light scattering results showed small average particle size, revealing the excellent storage stabilities.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Taishun Zhang,Manli Zhou,Bao Zhang,Xiaohong Peng
The use of waterborne polyurethane (WPU) is becoming increasingly prevalent in the effort to address the issue of glare. However, WPU continues to exhibit certain limitations in terms of its performance, including deficiencies in mechanical properties, and low chemical resistance. Consequently, this study employed polyacrylate (PA) modification to create waterborne polyurethane/acrylate (WPUA) hybrid emulsions with a core–shell structure, aiming to enhance their optical properties. Furthermore, different types of alcohol crosslinkers were added to investigate their effects on the optical and mechanical properties of the coatings. Accordingly, this paper presented the design and preparation of a multihydroxyl crosslinking modified antiglare core–shell PU@PA heteropolymer resin utilizing five different hydroxyl-containing crosslinking agents: polyhydroxy alcohols, trimethylolpropane, pentaerythritol, xylitol, and dipentaerythritol. The impact of selecting crosslinkers with varying hydroxyl numbers as well as optimizing their concentrations on particle size, gloss, and tensile strength of WPUA was thoroughly examined. Results revealed that with xylitol as the crosslinker at a mass fraction of 0.9%, the emulsion's average particle size was 680.6 nm, the gloss of the coating reached 42.8 GU, and the tensile strength was 22.31 MPa. The resulting functional WPUA exhibited excellent optical and mechanical properties, offering new insights for the development of antiglare coatings.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yancheng Yan,Zeyu Xue,Lianci Wu,Yumei Luo,Xiaodong Bai
In the process of oil and gas production, the failure of drilling fluid caused it to invade the formation, leading to wellbore instability. N-isopropylacrylamide (NIPAM), acrylamide (AM), and sodium p-styrene sulfonate (SSS) were used as raw materials, and the P(NIPAM/AM/SSS) (abbreviated as NAS) temperature-sensitive plugging agent was synthesized by inverse emulsion polymerization. The optimum synthesis conditions were obtained using a redox initiation system. Infrared measurements and UV–visible analysis showed that the target product was successfully prepared, and NAS exhibited a lower critical solution temperature (LCST) of 55°C, with sensitive temperature-responsive behavior. Rheological and filtration tests, along with high-temperature and high-pressure (HTHP) sand tray tests, demonstrated that the temperature-sensitive plugging agent effectively plugged the formation. Particle size analysis and Zeta potential analysis indicated that the addition of the temperature-sensitive plugging agent increased the electrostatic stability of bentonite-based slurry and polymer. Contact angle measurements and micro-morphology of the mud cake revealed that a hydrophilic-hydrophobic transition occurred at high temperatures in NAS, forming a dense hydrophobic film on the surface of the mud cake. This film effectively sealed cracks and micropores, reduced the invasion of free water, and improved wellbore stability.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Xiaomei Liu,Jing Li,Pengbo Liu,Cailing Yang,Ziqiang Lei
Adsorbent-based atmospheric water collection technology has great potential in the field of alleviating the shortage of freshwater resources. Here, we prepared the MOF-based hygroscopic polymer material (MPAA) with atmospheric water harvesting and liquid water storage by using MOF-801 with a double copolymerization bond and a three-dimensional structure as a functional monomer and copolymerized with acrylic acid (AA). The atmospheric water-holding properties of the materials at different humidity gradients (50%–90% RH) and their desorption properties under simulated daylight conditions were evaluated. The adsorption of water vapor by MPAA was 628.8 mg/g at the test time of 8 h, which was significantly higher than that of PAA. The field experiment indicated the material's potential to reduce evaporation of soil water, which could potentially be used to store liquid water. This strategy provides new insights into the design of functional materials for atmospheric water harvesting in arid areas and ecological restoration.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 47
·e56268
·
IF 2.7
Zhenjie Yuan,Siqi Huang,Wenduo Chen,Dazhi Jiang
By combination of UV curing and frontal polymerization, interpenetrating polymer networks (IPNs) based on diglycidyl ether of bisphenol-A (DGEBA) epoxy resin and polydicyclopentadiene (PDCPD) were prepared by UV-induced simultaneously frontal polymerization in this paper. Compared with the net DGEBA cured polymer, the tensile strength, elongation at break and impact strength of the IPNs were simultaneously improved. The maximum tensile strength and elongation at break of the IPNs reached 100 MPa and 4.64%, respectively, and the maximum impact strength reached 7.34KJ/m 2 with an improvement of 115.2% over that of the net DGEBA cured polymer. Thermogravimetric analysis (TGA) results revealed that the IPNs could enhance the thermal stability. Data of the differential scanning calorimetry (DSC) and TGA testing shows that the IPN shows a single glass transition temperature ( T g ) which is between the T g of DGEBA and DCPD, indicating homogeneous phase and highly cross-linked IPN formed. Morphologies and molecular structure of the IPNs polymer were observed by scanning electron microscope (SEM) and characterized by Fourier transform infrared spectroscopy (FTIR), respectively, whose results also proved the formation of ideal IPNs structures.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Zhangcheng Gao,Lianfang Feng,Xueping Gu,Jintang Duan,Mingzhe Jiang,Cailiang Zhang
The combination of aromatic and aliphatic structures can endow polyurea with distinct performance advantages. A one-step feeding method is used to synthesize linear hybrid aliphatic/aromatic copolyureas by varying the ratio of m -phenylenediamine (MPD) and polyoxypropylenediamine (D2000) reacting with 4,4′-diphenylmethane diisocyanate (MDI). Real-time Fourier-transform infrared spectrometer monitoring reveals that D2000 exhibits higher reactivity than MPD. Consequently, in the MDI/MPD/D2000 system, D2000 initially reacts with MDI to form an isocyanate-terminated prepolymer, which subsequently reacts with MPD. Compared with the two-step feeding method, this approach successfully eliminates biuret formation and enhances tensile strength. Additionally, decreasing the molar ratio of D2000 to MPD ( λ m ) reduces the size and degree of microphase separation in the polyurea by increasing the ordered hydrogen bonding and benzene conjugation, leading to an increase in tensile strength. Specifically, as λ m decreases from 70 mol% to 30 mol%, the degree of microphase separation decreases from 0.47 to 0.2, causing the tensile strength to rise from 28 to 48 MPa. Further reducing λ m to 30 mol% decreases the degree of microphase separation to 0.16, resulting in an increase in tensile strength to 78 MPa.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 5
·e56455
·
IF 2.7
Miao Cao,Qiaoyi Xiao,Bo Wu,Zhisheng Luo,Zhengwei Dai,Jie Yi
Marine biofouling is a major international challenge since it is responsible for several environmental problems and economic losses. Developing a novel antifouling coating with good water resistance, adhesion, and controlled degradation performance is crucial to solving the problem. Herein, a series of waterborne polyurethane emulsions were synthesized using the prepolymerization chain expansion and self-emulsification method, with varying contents of glycerol laurate (GL) as the post-chain extender. The findings demonstrated a notable enhancement in the controllable degradation performance, adhesion, marine antifouling properties, and water resistance with an increase in the concentration of GL. In particular, the film exhibited the most optimal overall properties when the introduction amount of GL was 2 wt%. The absorption rate of the artificial seawater (ASW) reached a state of equilibrium when GWPU2 was immersed in ASW for 60 days, with a final value of approximately 18.5%. The release rates of the GWPU2 antifouling coatings were observed to be the lowest at approximately 120 days, with a rate of approximately 37.59 μg/cm 2 /day. The long-term antifouling capability of the GWPU resins was demonstrated in marine field tests, wherein they exhibited sustained antifouling activity for a period exceeding 9 months. In particular, GWPU2 exhibited noteworthy antifouling performance.
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高影响因子
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