JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 35
·e55891
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IF 2.7
Zhoufeng Wang,Xiubo Long,Bolin Wang,Guojun Cheng,Guoxin Ding,Yingying Liu,Wenlong Yao
A range of new fluorine-containing copolyarylates were successfully produced through interfacial polymerization using hexafluorobisphenol A (BPAF) featuring a symmetric trifluoromethyl group structure, bisphenol B (BPB), and two acyl chloride monomers as raw materials. The results indicated that the synthesized amorphous copolyarylates exhibited good solubility, with number average molecular weights ( M n ) of 19,000–44,000 g/mol, weight average molecular weights ( M w ) of 66,000–159,000 g/mol, and intrinsic viscosities of 0.66–1.19 dL/g. The thermal stability of copolyarylates increased with the increase of BPAF monomer content (0~100%), which was manifested by the linear increase of glass transition temperature ( T g ) from 201.6 to 237.1°C, and the increase of 5% thermogravimetric weight loss temperature ( T 5% ) from 474.1 to 491.5°C. The tensile strength of copolyarylates ranged from 52.63 to 59.93 MPa, the tensile modulus ranged from 1102.08 to 1502.84 MPa, and the elongation at break ranged from 32.0 to 75.5%. In addition, the copolyarylates had good dielectric properties with a dielectric constant of 2.58–3.75 at 10 7 Hz and a dielectric loss tangent of 0.021–0.028.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 48
·e56281
·
IF 2.7
Yanna Zhao,Yingying Zhang,Xiaowei Bai,Yuqi Wang,Yiqing Li,Shuai Yang
Polyimide materials with high mechanical strength are widely used in various fields, but pose certain challenges in achieving sustainable material utilization. A poly(imide-imide) vitrimer material (ADTA) based on multiple dynamic covalent bonds (imide, imine, and disulfide bonds) was constructed by preparing vanillin difunctionalized derivatives (DVA) for aldolamine condensation reactions with bis-amine monomers (ATFA) and tris(2-aminoethyl) amines (TAEA) with imide structures. The ADTA material has good 5% thermal stability T d 5% (278.87°C), high energy storage modulus E (2421.26 MPa), and fast relaxation time (36.39 s). The thermal stability and mechanical properties of the material are enhanced by the more stable alicyclic structure of the imide structure. The material also demonstrated excellent solvent resistance and self-healing properties. This study provides a new option for the development of sustainable utilization of polyimide materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Hongdan Ao,Ling Lin,Di Pu,Xinmin Zhang,Yuanhao Luo,Meirong Wang,Zheng Li,Ren Ren
Oil-based drilling fluid is widely used in deep and ultra-deep well drilling, but long-term use will lead to cutting accumulation and performance degradation and cannot be recycled. In this study, octadecyl acrylate (SA), divinylbenzene (DVB), and cetyl dimethylallyl ammonium chloride (C16-DMAAC) were used as raw materials to synthesize a polymer particle SDCD that can be stably dispersed in the oil–water two-phase in ethanol solution as a waste oil-based drilling fluid flocculant. The structure of SDCD was characterized by FT-IR, 1 HNMR, SEM, XPS, Zeta potential, and particle size distribution, and its flocculation mechanism in waste oil-based drilling fluid was analyzed. The results show that the fine particle size of SDCD makes it easy to disperse in the mud, and the positive potential characteristics make it capable of electrostatic adsorption with kaolin. At the same time, the pore structure can provide a specific surface area to enhance the adsorption. When the dosage of SDCD was 2.5 wt%, the flocculation rate reached 87.66%, the slurry showed good rheology and emulsion stability, and it still met the performance standard after 150°C hot rolling again. In addition, SDCD was successfully applied to waste mud treatment on site, which significantly reduced the solid content and improved the mud performance. This study provides an effective method for the recycling of waste oil-based drilling fluid and helps to reduce drilling costs.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Wanglong Jia,Yi Liu,Na Han,Liuchun Zheng
Due to the good combined properties, poly(butylene succinate) (PBS) is a biodegradable polymer material with good application potential. Nevertheless, it has the drawback of low melt strength arising from its inherent linear macromolecular structure, which greatly restricts its processing, such as blowing. Multifunctional branching agents can be applied to boost polyester melt strength and improve blowing processability. In this work, the branched PBS was synthesized by introducing various branched agents, such as tartaric acid (TA), citric acid (CA), and pentaerythritol (PER), and their effect on the characteristics was systematically analyzed. Due to the incorporation of branched chains and micro-crosslinking structures, mechanical characteristics and melt strength of polymers have been improved effectively. PBS-PER0.1% exhibited tensile strength and elongation at break as high as 50.71 MPa and 347.92%, respectively. Additionally, crystallinity increases with the increase of PER content, which is opposite to the crystallinity of polymer synthesized from other branching agents. Thus, mechanical properties and rheological properties of PBS can be facilely controlled by regulating the chemical structure and content of branching agent.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yuhao Yang,Zejun Pu,Jiachun Zhong,Chihan Meng,Qiuxia Peng,Dayang Yu,Pan Zheng
PA6T is one of the most typical high-temperature resistant polyamides, which is widely used in military, transportation and communication fields. As an engineering plastic, thermal stability is a very important point, although there are many studies on copolyamide PA6T, but the in-depth analysis of its heat resistance and thermal degradation process is rarely studied. Therefore, two copolyamides, PA6T/66 and PA6T/610, were synthesized by high temperature and high pressure solution polycondensation method, and their thermal degradation processes and kinetic mechanisms were analyzed in depth. Firstly, the structure and composition of both were characterized by Fourier transform infrared spectroscopy (FTIR) and hydrogen nuclear magnetic resonance spectroscopy ( 1 H NMR). The results showed that copolyamide was synthesized successfully. Thermogravimetric analysis (TGA) and thermogravimetric infrared comprehensive analysis (TG-IR) were used to analyze the heat resistance and degradation products of the two copolyamides PA6T. The results of TGA showed that the initial decomposition temperature of the two copolyamides was about 400°C, and the temperature of PA6T/610 was slightly higher. TG-IR results showed that both copolyamides maintained good thermal stability before 350°C, without the generation of degradation products and their corresponding obvious characteristic absorption peaks. Thermal decomposition products increased significantly at about 400°C, and gradually became complete after 450°C. By comparing the Kissinger method, Flynn-Wall-Ozawa method (FWO), and Coats-Redfern method (CR), the thermal degradation activation energy and kinetic reaction mechanism of the two copolyamides were obtained.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 29
·e55654
·
IF 2.7
Yu Zhuang,Jiangyu Luo,Xiaojun Duan,Yanan Zhu,Jinqing Qu
The bio-based hydrophilic monoglycerol succinate was synthesized and reacted with bio-based raw materials including polyols, pentamethylene diisocyanate, 1,4-butanediol, to prepare the waterborne polyurethane acrylate (Bio-WPUA) emulsions with high bio-based content. The effect of bio-based polyol categories including poly(trimethylene ether glycol), poly(tetrahydrofuran), and castor oil on the properties of Bio-WPUA and its films were studied. The structure, thermal stability, crystallinity, contact angle, and mechanical properties of Bio-WPUA film were characterized with fourier infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction, contact angle analyzer, and mechanical tensile testing. It was found that Bio-WPUA film containing poly(trimethylene ether glycol) as the soft-segmented display good tensile stress, thermal stability, and water resistance with 1.38% of the water absorption rate, while Bio-WPUA containing castor oil polyol as the soft-segmented had good tensile strain and low-temperature film-forming properties with excellent film properties. The bio-carbon content of Bio-WPUA was high up to 40% according to ASTM D6866-22, and possesses good physical mechanical and chemical resistance performance. The results provide theoretical guidance for the synthesis of polyurethane emulsions with bio-based materials instead of petroleum-based materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Wanjing Zhang,Yuqi Shan,Liyan Wang,Yanming Chen,Liying Guo,Yunsheng Chong,Xin Qian
Currently, mainstream phthalate plasticizers pose serious threats to the environment and human health. As an eco-friendly and harmless alternative, polyester plasticizers have garnered widespread attention. However, their complex preparation process and low plasticizing efficiency have limited their practical application. In this study, a series of copolyester plasticizers (POMAZ), synthesized from azelaic acid, octanediol, and various contents of 2-methyl-1,3-propanediol (MPO), were prepared via direct esterification. The preparation process is controllable, and the number-average molecular weight of POMAZ ranges from 1000 to 4000, with a thermal degradation temperature above 270°C, demonstrating excellent thermal stability. PVC samples plasticized with POMAZ showed a decrease in glass transition temperature to −30°C and increased hydrophilicity with higher MPO content. Measurements of the tensile elongation at break of plasticized PVC verified the outstanding plasticizing performance of the POMAZ series. Specifically, POMAZ-45/PVC exhibited an elongation at break of up to 975.3%, with a plasticizing efficiency reaching 273.2%.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Maolin Liu,Changqing Lin,Weicheng Ou,Zehui Lu,Jiayi He,Xiaojie Chen,Fengbin Liu,Guoxiao Lin,Guojie Xu,Han Wang,Chunyang Pan
Cu:CsPbCl x Br 3-x quantum dots (QDs) with different Cu-to-Pb molar ratios were synthesized via a solvent-based thermal synthesis method, and highly stable blue-light PCL@Cu:CsPbCl x Br 3-x composite fibers (CFs) were prepared by electrohydrodynamic (EHD) technology. The photoluminescence (PL) properties of these Cu 2+ -doped Cu:CsPbCl x Br 3-x QDs and the stability of polymer encapsulation were investigated in this study. The results showed that with increasing Cu 2+ concentration, the CsPbCl 1.5 Br 1.5 QDs maintained their initial cubic crystal structure. The doping of Cu 2+ ions effectively eliminated the surface defects of CsPbCl 1.5 Br 1.5 QDs, facilitating excitonic recombination through radiative pathways. The PL quantum yield (PLQY) of Cu:CsPbCl 1.5 Br 1.5 QDs increased to 85%. In addition, The fiber encapsulation method effectively improved the stability of the Cu:CsPbCl 1.5 Br 1.5 QDs, After 3 days in water, the fluorescence intensity still remains at the initial 90%. Based on these results, it is believed that Cu:CsPbCl 1.5 Br 1.5 QDs have promising applications in optoelectronic devices in the future.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Fengbin Liu,Han Wang,Maolin Liu,Zehui Lu,Zhenpei Lin,Ying Chen
Currently, the problem of air pollution is getting more and more serious, especially the pollution of tiny solid particles (PM, particulate matter) in the air, which poses a great challenge to the environment and human health. Therefore, it is particularly important to develop air filtration materials with high filtration efficiency and low resistance to meet this challenge. In this study, we propose to prepare air filtration membranes by centrifugal jet electrospinning technology, design multifactorial orthogonal coupling experiments, and investigate the effects of key process parameters of centrifugal jet electrostatic spinning, including solution concentration, airflow rate, rotational speed, and voltage, on the fiber diameter and uniformity by applying the polar analysis of variance and analysis of variance. PAN-BaTiO 3 electret nanofiber filtration membranes with high efficiency and low resistance were prepared by combining the optimized process of centrifugal blowing electrospinning. Various characterization methods (tensile test, water contact angle test, surface charge test, filtration test) were used to evaluate the effect of different BaTiO 3 electret contents (0%, 0.1%, 0.5%, 1%) on the comprehensive performance of the filtration membranes, and the electret filtration efficiency of the electret filtration membranes prepared by the present process reached as high as 96.56% with a pressure drop of 29 Pa.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 5
·e56430
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IF 2.7
Chuntao Zhu,Meng Yu,Zijian Liang,Lanhe Zhang,Jian Zhang
This paper reports the formation of coacervates by the electrostatic interaction of poly (diallyldimethylammonium chloride) (PDDA) and adenosine triphosphate (ATP) in aqueous solution, examining its formation conditions, stability, and efficiency in separation. The ideal concentration for creating coacervate droplets in pure water, HEPES buffer, and NaCl solution was determined to be 20 mM of PDDA and ATP. Enhancing the stability of coacervates was achieved by incorporating phospholipid vesicles on their surface, presenting a novel strategy for building cell models. Ostwald Ripening was employed to comprehend the growth mechanism of the coacervates, while the Hofmeister Ion Series and Schulze-Hardy's rule were utilized to elucidate the stability differences in solutions containing NaCl, Na 2 SO 4 , and MgCl 2 . These coacervates were stable at concentrations below 90 mM NaCl, 200 mM Na 2 SO 4 , and 30 mM MgCl 2 , respectively. We also explored the specific separation of dyes and tetracycline hydrochloride (TC) in the coacervates. Separation efficiencies of 92.98% for methylene blue (MB), 94.19% for methyl orange (MO), and 85.94% for TC, were achieved by the coacervates, which can be attributed to the synergistic effects of hydrophobicity, electrostatic forces, and π-π interactions. The proposed coacervates have great potential in cell mimicry and water treatment.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 37
·e55950
·
IF 2.7
Chen Liu,Boxue Wang,Jin Zhang,Mingpeng Chen,Qingju Liu
Polyimide aerogels are often constrained by the poor mechanical performance when used as thermal insulation. In addition, there is requirement for flame retardant performance in the practical use. In this paper, a fiber-reinforced polyimide aerogel material was prepared by compounding polyisophthaloyl metaphenylene diamine fibers with the aerogel, which present good thermal insulation and excellent mechanical properties, flame retardancy, thermal stability, and certain hydrophobicity, as well as being very lightweight. The compressive strength of the polyimide aerogel was increased from 0.34 to 0.58 MPa by using the fibers as the reinforcing phase; meanwhile, the flame-retardant property was improved, and the limit oxygen index was increased from 33.8 to 36.5. The composite aerogel material has good potential for application in the fields of thermal insulation, building insulation, aerospace, etc.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Bozhen Wu,Yujing Yu,Peng Wu,Yidong Wu,Jiang Huang,Xuejiao Song
The design and preparation of lightweight and flexible electromagnetic interference (EMI) shielding composites with high efficiency and low reflection are critical to the electronic field. First, silver nanowires (AgNWs) were vacuum filtered on the electrospun thermoplastic polyurethane (TPU) fibrous film. Then, by combining the adhesive with the electrospun silicon carbide nanowhisker (SiCnw) @TPU composite fibrous film, the asymmetric EMI shielding composite films with high electromagnetic shielding efficiency (EMI SE) and low incident power were obtained. The lower AgNWs-TPU layer provides the primary EMI SE, and the upper SiCnw@TPU fibrous film is used for electromagnetic wave absorption. This unique asymmetric structure, the synergistic effect of SiCnw's particular absorbing function and the excellent conductivity of the AgNWs layer make the film show high overall SE (SE T = 55.18 dB). In order to improve the absorption effect of the composite film, the number of layers of SiCnw@TPU was adjusted, resulting in a final reflection coefficient value as low as 0.55. This work proposes a new strategy for developing EMI shielding composite films with high efficiency and low reflection, serving as a reference.
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高影响因子
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