JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Xi Ren,Duanyi Li,Zhibin He,Ruixuan Wang,Changxu Yang,Shujun Han,Haifeng Yu,Jingang Liu
Fluorine-free, fully aromatic polyimide (PI) films, characterized by the excellent optical transparency and high-temperature endurance, have been successfully synthesized through either homopolymerization or copolymerization of an ester-containing diamine, 2-(4-aminobenzoate)-5-aminobiphenyl (ABABP) and two distinct dianhydrides: 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride (BPADA) and 9,9-bis[4-(3,4-dicarboxyphenoxy)phenyl]fluorene dianhydride (BPFPA). Owing to the good solubility of the developed PI-I to PI-V resins in polar aprotic solvents, particularly in N,N-dimethylacetamide (DMAc), N-methyl-2-pyrrolidone (NMP) and N,N-dimethylformamide (DMF), the synthesis process was performed through a two-stage chemical imidization technique. The polymer solutions of PI-I to PI-V in DMAc were fabricated into films that showed exceptional optical clarity, featured with the ultraviolet cutoff wavelength (λ) below 375 nm, the light transmission at 450 nm (T 450 ) surpassed 80%, the b * values (CIE indices) below 4.5, and the turbidity percentage (haze values) under 0.5%. Despite the fact that a higher molar concentration of BPFPA components in the dianhydride segments led to a decline in the optical characteristics of the films, the thermal resistance was concurrently enhanced. The resulting copolymerized PI films exhibited a glass transition temperature (T g ) over 264.9°C, along with the coefficients of linear thermal expansion (CTE) values of 56.7 ~ 65.9 ppm/K in temperature range of 50 ~ 200°C.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yuluo Zheng,Jianming Lin,Jiaxin Cai,Qi Mo,Shuya Zhang,Xiyue Wang,Beiwei Wang,Yafei Qin,Lijie Huang
In this paper, poly(lactic acid) (PLA)/thermoplastic polyurethane (TPU) binary blend composites were prepared by a melt blending method using PLA as the substrate and TPU as the toughening component, to which carbon nanotubes (CNT) were added, and PLA/TPU/CNT shape memory composites with light-responsive and heat-responsive shape memory properties were prepared. The mechanical properties, micro-morphology, light-responsive, and heat-responsive shape memory properties of the prepared composites were investigated. The results showed that the toughening effect of thermoplastic polyurethane was best when the ratio of PLA to TPU was 8:2, based on which the light-converting particle CNT was added to prepare the light- and heat-responsive PLA/TPU/CNT ternary composites. The better the dispersion of CNT, the better the mechanical properties, stiffness, and shape memory properties of the composite. When the CNT content is 3 wt%, the shape memory performance is the best, and the composite has fast-response optical and thermal shape memory properties and high recovery ability, which can reach 100% under continuous light and heating conditions. Based on the composites, opto-thermal responsive smart packaging boxes and flower-shaped series–parallel integrated switch models were designed, expanding the applications of composites in the fields of smart packaging materials and electronic devices.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Linya Yan,Jinfeng Wang,Ying Mao,Hongshi Zhao,Wenxing Chen,Wangyang Lu
Currently, synthetic materials for soft tissue repair are non-biodegradable and rigid, while biodegradable natural polymer materials exhibit low mechanical strength. This study focuses on creating biodegradable silk patches with superior mechanical properties using warp knitting. Four kinds of silk patches were made, degummed, and their structural parameters and mechanical properties were evaluated. An orthogonal experiment was conducted to investigate the effects of heat-setting temperature and time on the patches' mechanical properties. The results show that the #D patch, with its moderate thickness and density, large and concentrated pores, high strength, and low elongation, closely resembles natural soft tissue. After heat setting at 120°C for 3 min, the mechanical properties significantly enhanced (up to 17.1%). The patch exhibited a longitudinal tensile strength of 276.81 N, transverse tensile strength of 330.73 N, burst strength of 1566.5 N, longitudinal tear strength of 307.33 N, transverse tear strength of 124.66 N, longitudinal suture pullout strength of 53.28 N, and transverse suture pullout strength of 73.89 N. This method of using warp knitting and digital weaving technology allows for the preparation of silk patches suitable for soft tissue repair, with high strength, stability, and porosity, making them ideal for tendon and rotator cuff repairs.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Qihai Wang,Zhifeng Luo,Xiaoli Ren,Haoran Fu,Quan Zhou,Keyou Chen,Shenwen Fang
Adhesive hydrogels frequently demonstrate poor mechanical properties; therefore, it is still challenging to integrate excellent adhesiveness and self-healing properties in one hydrogel. In this work, adenine and thymine were modified by grafting double bonds and then introduced into the structure of the polyacrylamide gel together with N, N′-methylene bisacrylamide (MBA) using a hybrid crosslinking strategy, and then a series of hybrid cross-linked hydrogels with adhesiveness and self-healing properties were successfully prepared. The hybrid crosslinking hydrogel exhibited a tunable adhesive performance and strength, by varying the content of base pairs, monomer concentration, cross-linker concentration, and initiator concentration. The recommended synthesis conditions for the P(AM-mAT) hydrogel were as follows: mA-mT concentration of the total monomer weight 5 wt%, total monomer concentration of 25 wt%, crosslinker (MBA) concentration of 0.5 wt%, and initiator APS concentration of 1.25 wt%. Under optimal conditions, the gel synthesized showed a hardness of 282 g and an adhesive force of 154.5 g. This hydrogel material exhibited excellent adhesion properties to materials such as plastics, glass, metals, and wood, with the best adhesion observed on glass.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Meirong Wang,Ling Lin,Pingya Luo,Di Pu,Xinmin Zhang,Zheng Li,Hongdan Ao
In this investigation, a new micro-crosslinked anionic polymer resistant to elevated temperature and high salinity, PKDASN, was synthesized using 3-chloropropyltriethoxysilane (KMB703), N, N-Dimethylacrylamide (DMAM), 2-acrylamido-2-methylpropanesulfonic acid (AMPS), N-vinyl caprolactam (NVCL), and sodium (4-vinyl phenyl)methanesulfonate (SVM) employing free radical polymerization in a water-based solution. The structure of PKDASN was analyzed using Fourier-transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, and X-ray photoelectron spectroscopy, while its microstructure was analyzed using scanning electron microscopy. Thermogravimetric analysis showed that the pyrolysis temperature of PKDASN was above 294°C. Adding KMB703 enables the polymer to form a dense and stable spatial network. This intensified polymer network could interact with bentonite via intermolecular force and Coulomb force and form a dual grid structure, which presents impressive stability and control of filtration in saltwater. This is mainly achieved through creating a “silane coupling layer” on the particle surface by KMB703, which facilitates the crosslinking and aggregation of the polymer, thereby reinforcing the polymer's framework. This implies that under high-temperature conditions of 230°C, 3 wt% PKDASN can improve the filtration effectiveness of drilling fluids and exhibit resistance to 15 wt% NaCl contamination. American Petroleum Institute filtration(FL API ) and High temperature and high pressure filtration(FL HTHP ) values were 4.6 and 23.0 mL, respectively. Therefore, this investigation provides a novel approach to utilizing the designated silane agent for the advancement of filtration loss additives in drilling fluids resistant to elevated temperature and high salinity.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 33
·e55835
·
IF 2.7
Jia Xu,Haitao Zou,Yanqiao Jin,Qixi Zheng,Fanghui Lei,Yuxin Wu
To improve the comprehensive properties of polybutylene furandicarboxylate (PBF), 2,5-furandicarboxylic acid (2,5-FDCA), and aliphatic chain diol 1,8-octanediol and 1,4-butanediol were used as monomers to synthesize a series of bio-based polybutylene glycol-octanediol 2,5-furandicarboxylate (PBOF). The results showed that the chemical composition of PBOF could be controlled through the molar ratio of monomers. Compared with PBF, as the proportion of octanediol segments gradually increased, PBOF could gradually transform from semi-crystalline thermoplastic to amorphous form, and the glass transition temperature ( T g ) gradually decreased. The crystallization ability reduced but a part of the crystal area was still retained. The copolyesters still has a decomposition temperature above 370°C, indicating excellent thermal stability. The introduction of the octanediol segment significantly improved the tensile mechanical properties and flexibility of the POBF copolyester. These meet the requirements for the preparation of bio-based engineering plastics. The water absorption rate of PBOF showed that it may have certain degradable potential. PBOF copolyesters have potential application prospects in bio-based medical plastics and biodegradable packaging polymer materials after copolymerization modification.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Huimin Dai,Jian Lan,Zou He,Liyin Zhang,Ying Xiong,Shanshan Dai
The development of shear-resistant drag reducer agent (DRA) is crucial for enhancing oil recovery, especially during high-speed pumping and fracturing processes where polymer networks are prone to damage, leading to the reduction of the drag reduction (DR) performance. To address this issue, the introduction of nano-silica into the polymer structure, while maintaining good DR, endows the DRA with better shear resistance and salt resistance through its unique cross-linking mode. In this study, a novel shear-resistant and fast-dissolving drag reducer was synthesized through free-radical polymerization using acrylamide (AM), acrylic acid (AA), 2-acrylamide-2-methylpropyl sulfonic acid (AMPS) and KH570 modified nano-silica. The comprehensive properties of drag reducer were studied using conductivity and dissolution time test, microscopic morphology analysis, thermogravimetric analysis, and rheological test. The results suggestion that the PAPO-10@SiO 2 exhibits outstanding characteristics, including rapid dissolution (4 min), excellent salt resistance (DR rate up to 80.41% at a polymer concentration of 500 mg/L) and nano-silica concentration of 1.5 wt%. Moreover, the mechanism of drag reduction was proposed that nano-silica connects the molecular chains through multiple cross-linking effects of chemical cross-linking and physical adsorption, which enhances the stability of the network structure and prevents the destruction of the molecular chain structure by shear force effectively (viscosity retention of 76.9% after shearing for 40 min at 90°C and 170 s −1 ). In summary, this study provides valuable insights for developing polymers with both shear resistance and dissolution properties in aqueous solutions.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Peijiang Long,Zhaorun Hou,Jinbo Cheng,Hui Li,Chunxia Zhao,Jialin Liao,Yuanpeng Wu,Haibo Zhao,Haoran Huang,Yuxing Li
Polybenzoxazine (PBa) aerogels have gained much attention as a fire-retardant material because of their flexible molecular design and excellent mechanical properties. Incorporation of inorganic fibers into PBa aerogels using a simple and effective method seems attractive yet challenging. Herein, we report a unique method for the one-step preparation of basalt fiber (BF) reinforced PBa composite aerogels by freeze-drying using carboxymethyl cellulose (CMC) as a dispersion carrier. Aqueous benzoxazine (Ba) monomer was used as the matrix and phosphoric acid was used as the polymerization catalyst, while the uniform dispersion of BF was achieved by blending with CMC. The results indicate that the PBa/CMC/BF composite aerogel reveals a layered microstructure with BF dispersed between the layers. And the composite aerogel achieves a low volume shrinkage (1.11%), and strong mechanical strength (compressive stress of 1.73 MPa at 60% compressive strain). Additionally, TGA analysis reveals that the composite aerogel achieves a higher initial decomposition temperature (> 200°C) and residual mass (> 48 wt%) in a nitrogen atmosphere. Excellent flame retardancy of PBa/CMC/BF composite aerogel is achieved due to the introduction of nonflammable BF: as BF content rises, its peak heat release rate decreases by 92.5%, average heat release by 86.6%, and total smoke release by 76.7%. In combustion tests, the composite aerogel self-extinguishes within 0.5 s. After hydrophobic modification, the composite aerogel achieves a water contact angle greater than 135°, while PBa/CMC/BF 3 exhibits the typical “silver mirror phenomenon” in water. This study presents a straightforward and rapid method for constructing a lightweight, flame retardant, hydrophobic, and high-strength fiber-reinforced PBa composite aerogel, with promising applications in the aerospace sector.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 37
·e55934
·
IF 2.7
Feng Zhou,Yu Dai,Wei Qin,Zhenyong Li,Yu Song,Fuli Bian,Quanwei Song,Xianyan Ren
Existing adsorption materials with drawbacks in the weak organic solvents/oil retention ability, slow adsorption speed and low adsorption capacity for alkanes still hardly meet demands of the application field, especially in emergencies. The copolymerization of the long-chain alkenes, 1-octene, with isoprene was designed in this paper to synthesize an adsorption resin (PIOT), instead of acrylate monomers reported in the literature. And trimethylolpropane triacrylate was designed as a crosslinking agent. Results show that the PIOT grows in the form of powders, which are the loose accumulation of nanoflakes with a diameter of about 47.89 ± 11.06 nm. In view of the chain structure and morphology of the PIOT, it can quickly reach the maximum adsorption within 10 s along with a high adsorption capacity for various solvents and kerosene. Even for hexane, the adsorption capacity of the PIOT increases by 345.2% compared with the reported adsorption resin. The oil retention rate of PIOT can be maintained at 86 ± 6% after centrifugation at 1000–3000 rpm for 5–25 min. Compared with commercial activated carbon, the PIOT has outstanding advantages in recycling property and oil retention rate and compared with the reported acrylate adsorption resin, the PIOT has made a great breakthrough in adsorption capacity for alkanes.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Hao Zhang,Xi Qi,Xiaoyu Zhang,Yujie Liu,Ning Li,Fanglei Zeng,Shengling Jiang,Jianning Ding
It is difficult to recycle classic thermosetting plastics. Although some of them can be reprocessed, the mechanical properties decline linearly after processing. In addition, most thermosetting plastics are not environmentally friendly and difficult to degrade, resulting in a lot of pollution and limiting their practical application potential. In this paper, the prepolymer is synthesized by using castor oil (CO), hydroxyl terminated polydimethylsiloxane (PDMS-OH), and toluene diisocyanate (TDI). Using 4,4'-diaminodiphenyl disulfide (ODD) as a chain extender with dynamic disulfide bond and aniline (An) as a blocking agent, polysiloxane-aminoester (SiCPUO) with recyclable function under DMF induction was prepared. The effect of the amount of rigid chain extender (ODD) containing disulfide bond on the properties of SiCPUO was studied, its heat resistance will first increase and then decrease with the increase of ODD content, especially the mechanical properties are more obvious, this trend has never been reported before; the mechanical properties and recyclability of SiCPUO are tested, and the comprehensive performance of SiCPUO2 is the best, the tensile strength is 0.84 MPa and the elongation at break was 65.81%; the solubility test of different solvents showed that it has recyclability, recovery rate is 95%;the material has self-healing function, the repair efficiency is up to 95%.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 29
·e55684
·
IF 2.7
Tong Yan,Hao Jiang,Wuting Pang,Tinglei He,Meng Cheng,Zhikun Wang,Chunling Li,Shuangqing Sun,Songqing Hu
Vitrimer materials have machinability and stability because of their shape remodeling and self-healing properties at high temperatures. This article reports the synthesis of epoxy resin using vanillin, p-aminophenol, and epichlorohydrin as raw materials, and polyetheramine-400 as a curing agent. To study the effect of free amine on the mechanical and self-healing properties, two materials with epoxy and amine stoichiometric ratios of 1:1 and 1:1.2 were studied, respectively. The experimental results show that when the molar ratio of epoxy to amine stoichiometric is 1:1.2 (V 1:1.2 ), the tensile strength of vitrimer materials can reach 5.4 MPa and the self-healing efficiency can reach 99.5% after 6 h of healing at 120°C. When the molar ratio is 1:1 (V 1:1 ), the obtained epoxy material has a higher tensile strength of 9.5 MPa. After 24 h of healing at 120°C, the self-healing efficiency can reach 83.4%. In addition, epoxy vitrimer materials can be remodeled at 120°C, and the self-healing and mechanical properties are not influenced after remodeling. This work proposes a novel preparation method for epoxy vitrimer materials, which is beneficial to the development of high-strength remodelable self-healing materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 37
·e55933
·
IF 2.7
Jie Li,Qiyun Jiang,Shanjun Gao,Chunhui Shen
Konjac glucomannan (KGM) and partially hydrolyzed polyacrylamide (HPAM) have good application prospects in the field of petroleum fracturing field, but few studies on the rheological properties of KGM and HPAM double polymer gel systems have been reported. Optimal conditions for the high temperature and shear resistant organozirconium crosslinked double polymer gel system for petroleum fracturing were explored through optimization experiments. The thickener contained a mass ratio of 2:1 of KGM to HPAM, while the organic zirconium crosslinking agent had controlled molar ratios of 1:4:3:3 of zirconium butoxide to ligand acetylacetone, triethanolamine, and glycerol. This work presents a systematic analysis of the chemical structure, microstructure, delayed crosslinking performance, temperature resistance, and shear resistance of the gel system. The study found that the crosslinking ratio of 100:2 resulted in a controllable delayed crosslinking time of the gel formed by the organic zirconium crosslinking agent and 4.0 g/L KGM/HPAM thickener within 5–25 min at room temperature. The viscosity remained above 81 mPa·s even after shearing for 100 min at 140°C and 170 s −1 . These findings provide a useful reference for the application of organic zirconium crosslinked KGM/HPAM gel system in the petroleum fracturing field.
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高影响因子
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