JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 42
·e56117
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IF 2.7
Mengxia Xu,Jingshun Liao,Zhu Luo,Ruhui He,Shenglong Yang,Hai Li,Yehan Yang
Polypropylene double-grafted maleic anhydride and bisphenol A epoxy resin (PP-g-M-E) was successfully prepared by a single-step method and characterized by Fourier-transform infrared spectroscopy. Subsequently, it was employed as a compatibilizer to fabricate polypropylene (PP)/polyethylene terephthalate (PET) blends via melt extrusion. The content of the PET dispersed phase in the composite varied from 0 to 30 phr. The microstructure and morphology of the composites were characterized using scanning electron microscopy and Raman spectroscopy. The addition of PP-g-M-E increased the interfacial interaction between the two phases and improved the compatibility and thermal stability of the system. In the presence of the compatibilizer, the crystallinity of the matrix phase (PP) increased, while that of the dispersed phase (PET) decreased owing to the heterogeneous nucleation effect of uniformly distributed PET. Double grafting of the PP-g-M-E compatibilizer considerably enhanced the mechanical performance of the PP/PET blend system. The elongation at break of the modified sample exceeded that of the PP/PET blends by 117.55%, and the flexural and impact properties also showed considerable improvement.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Yuxiu Yu,Jin Li,Yaodong Liu
This study investigated the fabrication of polyacrylonitrile (PAN) membranes using non-solvent induced phase separation methods, with the addition of thermoplastic polyurethane (TPU) as an additive. The incorporation of TPU and the utilization of stepwise induced phase separation techniques resulted in notable improvements in membrane structure and water filtration performance. Scanning electron microscopy revealed that membranes with TPU exhibited a denser pore network and finer primary channels, leading to enhanced water flux and protein rejection rates. Mechanical testing indicated that TPU addition improved the membrane's mechanical properties, particularly its elongation at break and tensile strength, especially under wet conditions. Additionally, optimization of the coagulation bath involved methanol spraying followed by water immersion, resulting in membranes with further enhanced flux and rejection properties. Compared with neat PAN membranes, the membranes with TPU exhibited increased water flux from 405 to 539 L/m 2 h, as well as improved elongation at break and tensile strength in both dry and wet conditions. Furthermore, the combination of stepwise induced phase separation significantly enhanced the water flux from 342.7 to 483.0 L/m 2 h, while also improving the retention rate of ovalbumin from 25.7% to 31.5%.
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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
·
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
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
·
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
·Vol. 141
·期 39
·e55997
·
IF 2.7
Ao Nan Lai,Zhen Wang,Ren Ke Lin,Xin Zhi Han,Shu Feng Zhou
The anion exchange membrane (AEM) suffered from poor mechanical properties and low ionic conductivity in fuel cells. Herein, a series of novel block fluorene-contained poly(arylene ether ketone)s backbones are synthesized by a tandem one-pot process and then grafted with alkyl chains to form comb-shaped structure for preparing AEMs. The one-pot synthesis of block copolymer avoids the multiple purifications of oligomers. The membranes' structure–property relationship is studied by changing the ratios of hydrophilic and hydrophobic segments. The designed comb-shaped structures grafted on fluorene-containing block backbones can widen the space between chains and form clear microphase separation patterns, as determined by atomic force microscope (AFM) and small angle x-ray scattering (SAXS). Hence, resulting AEMs have a high ionic conductivity (117.4 mS cm −1 , 80°C). Meanwhile, they also present low swelling rate (SR) from 12.76% to 18.51% at 30°C, 16.84% to 24.36% at 60°C, and 18.33% to 25.81% at 80°C. In addition, excellent mechanical properties, that is, an elongation at break of 29.63% and a tensile strength of 28.72 MPa, are achieved and showed the promise of as-fabricated AEMs in fuel cell applications.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Panpan Zhang,Susu Xing,Zibo Lin,Zhenxia Zhao,Hao Kong,Jing Li
Based on the high chemical stability and excellent end-group functionalization capability of polyhedral oligomeric silsesquioxane (POSS), this study utilized thiol-functionalized POSS (POSS-SH) in a click chemistry reaction with styrene-butadiene-styrene triblock copolymer (SBS). The objective was to design a functional group forming a chemical bond with the polymer matrix, resulting in the preparation of thiol-functionalized polyacrylonitrile (PAN) fibers chemically cross-linked with POSS-SH/PAN/SBS hybrid material. This hybrid material not only enhanced the compatibility between the components but also facilitated a connection between the fiber and SBS, thereby improving the mechanical properties of the modified asphalt. Fourier transform infrared spectroscopy, field emission scanning electron microscopy (FESEM), and atomic force microscopy analyses confirmed the successful modification of POSS-SH/PAN fibers. FESEM analysis of the modified asphalt verified that POSS-SH/PAN fibers contributed to strengthening the interfacial performance between the fiber and asphalt. Cone penetration and dynamic shear rheometer tests indicated that, compared to SBS-modified asphalt, PAN/SBS and POSS-SH/PAN/SBS-modified asphalt exhibited enhanced shear strength, deformation resistance, and viscoelastic properties. Additionally, at 46°C, the storage modulus (G′) of 1.5% POSS-SH/PAN/SBS-modified asphalt increased by 11% compared to 1.5% PAN/SBS asphalt, with increases of 13.75% and 10.8% in loss modulus (G″) and complex modulus (G*), respectively.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Shangsong Han,Yong Wang,Binhong Gan,Jun Cai,Siyi Jiang,Cuiyu Huang,Shanshan Li
MIL-53(Fe), as a typical metal–organic framework (MOFs) material, has shown broad application prospects in the field of membrane separation technology due to its advantages such as high specific surface area and good chemical stability. However, few studies have specifically applied it to the preparation of oil–water separation membranes. Therefore, this study innovatively proposed a self-assembly strategy. By constructing a MOFs composite coating covering the membrane surface and a comprehensive metal polyphenol network (MPN), this approach was designed to form an efficient, comprehensive oil-rejection system while significantly enhancing pure water flux. Then, through a series of characterizations and performance tests, the results showed that the prepared composite membrane exhibited excellent oil–water separation performance: pure water flux was as high as 3641.21 L m −2 h −1 , and at the same time, the rejection rate of oil-in-water emulsion was stably maintained at more than 99.58%. Therefore, this study not only successfully verified the great potential of MIL-53(Fe)-based composite membranes in the field of efficient oil–water separation, providing a new theoretical basis and feasible technical path for its design, but also further expanded the practical application prospects of MOFs materials in the treatment of oily wastewater, opening up new ideas for the development of the next generation of high-performance separation membranes.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Heng Wang,Shichao Li,Yeqing Liu,Yuhang Liu,Tianliang Tan,Zhishen Yin,Xiaoyong Su,Duo Chen,Jialiang Li,Zhanjun Wu
Epoxy resin (EP) adhesive performance is critical for the glass fiber-reinforced composites (GFRP) in the Membrane-Type liquefied natural gas (LNG) cargo containment systems (CCS). In this work, the polyurethane-modified epoxy resin (EPU) and Nano-SiO 2 were introduced into EP to develop a resin system with enhanced bonding strength and durability for bonding glass fiber and aluminum foil. The results demonstrated that the peel strength of the EP/EPU50/2 wt.% Nano-SiO 2 -GF reached 3.78 kN m −1 at room temperature (RT), which was approximately 172% higher than that of EP-GF (1.39 kN m −1 ). Even at −190°C, the peel strength remained 2.66 kN m −1 . The continuous flexible polyurethane phase dissipated mechanical energy through chain extension and hydrogen bonding, while the Nano-SiO 2 improved the crack propagation resistance, thus enhancing adhesion. In addition, after 30 days of exposure to ultra-low temperature (−196°C) and 40 thermal cycles, the peel strength of EP/EPU50/2 wt.% Nano-SiO 2 -GF at RT still reached 2.92 kN m −1 and 3.53 kN m −1 , respectively. SEM analysis revealed that ultra-low temperature could induce interfacial debonding between the resin layer and aluminum foil. The transition of failure mode from cohesive failure to adhesive failure was the main reason for the decrease in peel strength.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Rongjian Xue
To further enhance the comprehensive performance of polymer electrolytes, this study prepares a ternary composite gel polymer electrolyte (CGPE) based on TiO 2 /thermoplastic polyurethane (TPU)/polydimethylsiloxane (PDMS) via a solution casting method, systematically investigating the influence of TiO 2 content on the properties of CGPE. Structural characterization reveals that TiO 2 nanoparticles achieve a “dual crystalline phase regulation” mechanism by inhibiting polymer crystallization and introducing anatase crystal phase. When the TiO 2 content is 9 wt%, the CGPE exhibits optimal performance: ionic conductivity reaches 4.59 × 10 −3 S/cm, an 81.5% increase compared to the pure polymer matrix; tensile strength is 9.61 MPa, elongation at break is 449%; lithium ion transference number is 0.78; and the electrochemical stability window is 0–5.0 V versus Li/Li + . The assembled LiFePO 4 /Li half-cell demonstrates a rate capability of 87.4% when the current density increases from 0.1 to 1 C, with 99.2% retention after 100 cycles. The results confirm the application potential of TiO 2 -reinforced CGPE in high-safety lithium-ion batteries.
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高影响因子
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