Journal of Applied Polymer Science最新文献_第2页

Effect of Co-Monomer Maleic Acid on the Properties of Semi-IPN Hydrogels Based on Polyacrylamide and N,N′-Dimethylacrylamide for Soil Moisture Retention and Phosphate Release 共聚单体马来酸对基于聚丙烯酰胺和N，N ' -二甲基丙烯酰胺的半ipn水凝胶土壤保湿释磷性能的影响

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-09-01 Epub Date: 2026-07-14 DOI: 10.1002/app.71183

Bui Thi Cam Phan, Ho Phuong, Tran Thi Nhung, Duong Gia Huy, Nguyen Ngoc Que Anh, Huynh Nguyen Anh Tuan

{"title":"Effect of Co-Monomer Maleic Acid on the Properties of Semi-IPN Hydrogels Based on Polyacrylamide and N,N′-Dimethylacrylamide for Soil Moisture Retention and Phosphate Release","authors":"Bui Thi Cam Phan, Ho Phuong, Tran Thi Nhung, Duong Gia Huy, Nguyen Ngoc Que Anh, Huynh Nguyen Anh Tuan","doi":"10.1002/app.71183","DOIUrl":"https://doi.org/10.1002/app.71183","url":null,"abstract":"<div>\u0000 \u0000 <p>A series of semi-interpenetrating polymer network (semi-IPN) hydrogels were prepared by free-radical polymerization of N,N′-dimethylacrylamide (DMA) and maleic acid (MA) in the presence of linear polyacrylamide (PAM). The ternary PAM/DMA/MA semi-IPN structure was designed to combine network reinforcement, swelling regulation, soil moisture retention, and phosphate adsorption/release within a single hydrogel platform. The influence of MA content on the properties of the hydrogels was systematically investigated. FTIR analyses confirmed the successful incorporation of MA, while SEM images revealed its effect on the internal network morphology. TGA, DSC, mechanical, and rheological results showed that increasing MA content raised thermal stability, the Tg, improved compressive strength and storage modulus. Swelling experiments showed a maximum equilibrium swelling ratio of 3240.16% in deionized water, along with clear responsiveness to pH and ionic strength. The hydrogels also exhibited effective phosphate adsorption/release performance, achieving a cumulative phosphate release of 78.75% after 6000 min, with the release behavior best described by the Zero-order kinetic model. Furthermore, soil application tests indicated that hydrogel-amended soils maintained a residual moisture content of approximately 16.5% after five repeated wetting-drying cycles, each lasting about 12 days, while showing negligible variation in soil pH.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 38","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148862300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mixing Efficiency in an Intermeshing Internal Rubber Mixer Under Variable Rotor Speed and Rotor Wear Conditions 变转子转速和转子磨损条件下啮合式内混炼机的混炼效率

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-09-01 Epub Date: 2026-07-23 DOI: 10.1002/app.71185

Fareed Konadu Osman, Dandan Hou, Lei Han, Qi Zhou, Jie Gao, Chunsheng Zhang, Leilei Miao, Alfredo Iranzo

{"title":"Mixing Efficiency in an Intermeshing Internal Rubber Mixer Under Variable Rotor Speed and Rotor Wear Conditions","authors":"Fareed Konadu Osman, Dandan Hou, Lei Han, Qi Zhou, Jie Gao, Chunsheng Zhang, Leilei Miao, Alfredo Iranzo","doi":"10.1002/app.71185","DOIUrl":"https://doi.org/10.1002/app.71185","url":null,"abstract":"<div>\u0000 \u0000 <p>This study investigates the effect of rotor speed and wear on mixing efficiency in an intermeshing internal rubber mixer operating under partial fill conditions. A three-dimensional CFD model was created utilizing dynamic remeshing to resolve intricate rotor-rubber interactions and capture the developing air-rubber interface using a volume-of-fluid (VOF) method. The rubber compound was modeled using the Carreau-Yasuda viscosity model. The Manas-Zloczower mixing index (MI) was used to assess mixing performance. Increasing rotor speed from 35 to 50 rpm expands elongation-dominated zones by up to 800% indicating improved dispersive mixing. Further increase in speed produced little additional benefit. It was also revealed that 35 rpm is helpful when bulk mixing is prioritized, providing a 5.4% increase in moderate-MI states. Rotor wear of up to 10% of the rotor blade height inhibits elongational flow development by up to 60% while increasing bulk mixing by up to 35%, suggesting that mildly worn rotors may remain useful for bulk-mixing-dominated applications, although this requires experimental confirmation. Analysis of rubber volume fraction evolution and velocity fields showed that localized high-velocity jets intensified with rotor speed but weakened with wear. The findings provide practical considerations for maintaining compound homogeneity and improving mixer performance in industrial rubber compounding.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 38","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148862413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrospinning HPAN@CuS Nanofibers for Multiple Functional Applications 静电纺丝HPAN@CuS纳米纤维的多种功能应用

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-09-01 Epub Date: 2026-07-28 DOI: 10.1002/app.71189

Sen Zeng, Xinyi Wang, Xinqi Niu, Junhui Si, Qiong Liu, Qianting Wang, Zhixiang Cui

{"title":"Electrospinning HPAN@CuS Nanofibers for Multiple Functional Applications","authors":"Sen Zeng, Xinyi Wang, Xinqi Niu, Junhui Si, Qiong Liu, Qianting Wang, Zhixiang Cui","doi":"10.1002/app.71189","DOIUrl":"https://doi.org/10.1002/app.71189","url":null,"abstract":"<div>\u0000 \u0000 <p>Electrospun nanofiber membranes with large specific surface area, high porosity, interconnected architecture, and facile functionalization offer immense potential for wastewater treatment. Herein, an HPAN@CuS fiber membrane was prepared by electrospinning technology and in situ sulfidation technology. The effects of different reaction precursors and growth processes on the morphology of the HPAN@CuS nanofiber membranes were investigated. The photocatalytic and water evaporation performance of the HPAN@CuS fiber membrane was also studied. Under visible light irradiation, the prepared HPAN@CuS composite nanofiber membrane showed a degradation efficiency of 97.30% for MB within 35 min. Under natural sunlight conditions, the degradation efficiency of MB reached 95.09% within 35 min, demonstrating excellent photocatalytic performance. Moreover, the HPAN@CuS membrane achieved a water evaporation rate of 1.136 kg m<sup>−2</sup> h<sup>−1</sup> for pure water and 1.145 kg m<sup>−2</sup> h<sup>−1</sup> for seawater under one sun when used for solar-driven water evaporation. Therefore, the prepared HPAN@CuS fiber membrane possesses excellent photocatalytic performance and solar water evaporation capability, indicating its broad application prospects in water pollution treatment.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 38","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148862510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of Micro/Nanosized SiO2 Reinforcement Impact on Mechanical, Thermal, and Hydrophobicity of Polypropylene Composite Compatibilized With Polypropylene-Graft-Maleic Anhydride Copolymer (PP/PP-g-MA) 微/纳米SiO2增强剂对聚丙烯-接枝马来酸酐共聚物（PP/PP-g- ma）增容聚丙烯复合材料力学、热性能和疏水性影响的比较

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-09-01 Epub Date: 2026-07-28 DOI: 10.1002/app.71182

La Ode Muhammad Zuhdi Mulkiyan, Mohd Shaiful Zaidi Mat Desa, Mohd Bijarimi, Muhammad Nur Hakim, Nur Liyana Afiqah Hesamuddin, Masleeyati Yusop, Siti Hasnah Kamarudin

{"title":"Comparison of Micro/Nanosized SiO2 Reinforcement Impact on Mechanical, Thermal, and Hydrophobicity of Polypropylene Composite Compatibilized With Polypropylene-Graft-Maleic Anhydride Copolymer (PP/PP-g-MA)","authors":"La Ode Muhammad Zuhdi Mulkiyan, Mohd Shaiful Zaidi Mat Desa, Mohd Bijarimi, Muhammad Nur Hakim, Nur Liyana Afiqah Hesamuddin, Masleeyati Yusop, Siti Hasnah Kamarudin","doi":"10.1002/app.71182","DOIUrl":"https://doi.org/10.1002/app.71182","url":null,"abstract":"<div>\u0000 \u0000 <p>This study investigates the effect of the particle size of silicon dioxide (SiO<sub>2</sub>), specifically micro-size (m-SiO<sub>2</sub>) and nano-size (n-SiO<sub>2</sub>), on the properties of polypropylene (PP)/polypropylene-grafted maleic anhydride (PP-g-MA) composites. The composites were prepared by melt mixing in a twin-screw extruder, followed by compression molding. Based on mechanical and thermal characterization, the inclusion of m-SiO<sub>2</sub> enhanced composite rigidity but reduced ductility and flexibility, whereas n-SiO<sub>2</sub> exhibited the highest maximum decomposition temperature (T<sub>peak</sub>), indicating high thermal stability. FTIR analysis confirmed the formation of hydrogen-bonding interactions between SiO<sub>2</sub> and PP-g-MA, thereby enhancing filler-matrix adhesion. Furthermore, XRD results demonstrated that particle size plays a crucial role in governing the interfacial behavior of the composites. Morphological and surface properties indicate that the incorporation of n-SiO<sub>2</sub> into the matrix PP/PP-g-MA results in a more homogeneous dispersion with lower levels of agglomeration and pull-out defects compared to m-SiO<sub>2</sub>, leading to a denser and more cohesive composite structure. This improved morphology promotes stronger interfacial interactions and significantly enhances the hydrophobic surface properties of the composites, as evidenced by a 9.91% increase in the water contact angle for the n-SiO<sub>2</sub> based composite compared with the m-SiO<sub>2</sub> filled composite.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 38","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148862509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cooling Holes in Polymer Spur Gears: A Critical Analysis of Heat Dissipation Benefits and Mesh Stiffness Penalties 聚合物直齿齿轮的冷却孔：散热效益和啮合刚度损失的关键分析

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-09-01 Epub Date: 2026-07-17 DOI: 10.1002/app.71177

Abderrahim Baccar, Ahmed Samet, Ahmed Hammami, Nuno Dourado, Ali Akrout, Mohamed Haddar

{"title":"Cooling Holes in Polymer Spur Gears: A Critical Analysis of Heat Dissipation Benefits and Mesh Stiffness Penalties","authors":"Abderrahim Baccar, Ahmed Samet, Ahmed Hammami, Nuno Dourado, Ali Akrout, Mohamed Haddar","doi":"10.1002/app.71177","DOIUrl":"https://doi.org/10.1002/app.71177","url":null,"abstract":"<p>Polymer spur gears offer advantages such as low weight and reduced noise but are often limited by heat accumulation during operation. This study investigates cooling holes as a passive thermal-management strategy and quantifies the resulting thermal–mechanical trade-off in polyoxymethylene (POM) spur gears. Three-dimensional finite element analysis (FEA) coupled with response surface methodology was used to evaluate cooling-hole diameters ranging from 0.5 to 1.5 mm (<i>D/m</i> = 0.25–0.75) and locations from 3 to 4 mm (<i>L/m</i> = 1.5–2) below the tooth tip. The results show that cooling holes reduce maximum operating temperature by up to 9.39% while decreasing mean gear mesh stiffness (GMS) by 0.84%–15.62%. Hole diameter is identified as the dominant parameter governing both cooling effectiveness and stiffness degradation, whereas hole position exerts a secondary influence. A validated quadratic regression model (<i>R</i><sup>2</sup> = 0.932), calibrated using a face-centered central composite design and independently verified with four hold-out configurations, enables rapid estimation of GMS without repeated finite element simulations. The findings provide practical design guidelines for balancing thermal management and structural performance in polymer spur gears.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 38","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/app.71177","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148862261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

UV-Accelerated Aging Behavior of PA66 Fiber Ropes: Molecular Chain Scission Mechanism and Residual Strength Degradation Model 紫外光加速老化行为的PA66纤维绳：分子链断裂机制和残余强度退化模型

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-09-01 Epub Date: 2026-07-30 DOI: 10.1002/app.71181

D. D. Chen, Z. Li, D. T. Zhang, Maged Elhefnawey, W. Zheng, L. Li

{"title":"UV-Accelerated Aging Behavior of PA66 Fiber Ropes: Molecular Chain Scission Mechanism and Residual Strength Degradation Model","authors":"D. D. Chen, Z. Li, D. T. Zhang, Maged Elhefnawey, W. Zheng, L. Li","doi":"10.1002/app.71181","DOIUrl":"https://doi.org/10.1002/app.71181","url":null,"abstract":"<div>\u0000 \u0000 <p>Polyamide 66 (PA66) fiber ropes are widely employed in harsh outdoor applications, such as marine mooring systems, owing to their high strength and excellent aging resistance. However, long-term exposure to ultraviolet (UV) radiation induces molecular chain scission in PA66 fibers, resulting in surface morphological degradation, mechanical performance degradation, and a significant reduction in service lifetime. This study presents the first systematic investigation into the multi-scale evolution mechanism of PA66 ropes under UV aging and develops a residual strength prediction model. The results demonstrate that UV aging induces the formation of microcracks and leads to a 10-fold increase in surface roughness. Simultaneously, photooxidative chain scission occurs at the molecular level, accompanied by the generation of oxygen-containing functional groups. Based on the experimental data, a lifetime prediction equation is developed, exhibiting excellent fitting accuracy with a coefficient of determination (<i>R</i><sup>2</sup>) of 0.9971. These findings clarify the UV aging mechanism of PA66 fiber ropes and provide a solid theoretical basis for service life evaluation, preventive maintenance strategies, and the development of high-weather-resistance fiber materials for long-term outdoor applications.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 38","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148862549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and Characterzation of High-Thermal-Stability PI/PEKK Composite Films 高热稳定性PI/PEKK复合薄膜的制备与表征

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-09-01 Epub Date: 2026-07-10 DOI: 10.1002/app.71178

Shuang Yang, Jing Wang, Botao Zhou, Rong Ren, Xuhai Xiong

{"title":"Preparation and Characterzation of High-Thermal-Stability PI/PEKK Composite Films","authors":"Shuang Yang, Jing Wang, Botao Zhou, Rong Ren, Xuhai Xiong","doi":"10.1002/app.71178","DOIUrl":"https://doi.org/10.1002/app.71178","url":null,"abstract":"<div>\u0000 \u0000 <p>This study successfully prepared high-performance polyimide/polyetherketone ketone (PI/PEKK) composite films through atmospheric pressure plasma modification combined with solution coating technology, with the aim of improving the thermal stability and mechanical properties of aviation cable insulation materials. Firstly, a PEKK multi-scale water-based dispersion scraping process was developed, and 380°C was determined to be the optimal sintering temperature. Composite film performance tests show that a PEKK coating with a concentration of 10 wt% can form a uniform and continuous coating on the PI film surface, and the PI/PEKK composite film exhibits excellent comprehensive performance. In terms of thermal stability, the glass transition temperature reaches 292°C, which is a significant improvement over the pristine PI film (272.5°C). The initial decomposition temperature (T<sub>5%</sub>) exceeds 520°C, and the carbon residue at 800°C remains above 57%. In terms of dielectric properties, the dielectric constant in the 40 Hz low frequency range has been increased to 3.49, while maintaining low dielectric loss. In terms of mechanical properties, the tensile strength reached 293.28 MPa, and the peel strength was as high as 5.12 N/cm.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 38","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148862252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polymer-Based Shape Memory Composites for Adaptive Textiles: From Molecular Switching to Garment-Level Functions 用于自适应纺织品的聚合物基形状记忆复合材料：从分子转换到服装级功能

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-09-01 Epub Date: 2026-07-14 DOI: 10.1002/app.71188

Xiaoyu Guan, Zihan Wang, Wangyang Lu, Puzhen He, Zhengfeng Dong, Heng Zhang, Jie Diao, Rui Wang

{"title":"Polymer-Based Shape Memory Composites for Adaptive Textiles: From Molecular Switching to Garment-Level Functions","authors":"Xiaoyu Guan, Zihan Wang, Wangyang Lu, Puzhen He, Zhengfeng Dong, Heng Zhang, Jie Diao, Rui Wang","doi":"10.1002/app.71188","DOIUrl":"https://doi.org/10.1002/app.71188","url":null,"abstract":"<p>Shape memory polymers (SMPs) and their composites offer a promising route for transforming textiles from passive materials into adaptive, programmable, and responsive systems. For smart clothing, their importance lies not simply in macroscopic shape recovery, but in using molecular switching to regulate textile interfaces and transport pathways. This review provides a textile-oriented perspective on polymer-based shape memory composites, focusing on how programmable polymer networks are translated into fibers, yarns, membranes, fabrics, coatings, Janus interfaces, and garment-level functions. Recent advances in segmented polyurethanes, semicrystalline switching systems, elastomeric networks, biobased polymers, porous structures, conductive nanocomposites, and textile-reinforced composites are discussed in relation to processability and wearable relevance. Representative applications include adaptive thermal–moisture management, responsive wettability, shape-changing textiles, sensing, compression therapy, medical devices, protection, and sustainable smart garments. Beyond shape fixity and recovery ratios, this review emphasizes recovery stress, response speed, safe activation, breathability, comfort, laundering durability, textile manufacturability, and garment-level validation. The major challenge is to connect polymer-level shape memory with measurable improvements in comfort, protection, therapy, sensing, actuation, fit, and sustainability under realistic wearing conditions. Future SMP smart textiles should evolve from proof-of-concept samples toward body-safe, washable, scalable, circular, and human-centered adaptive clothing systems.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 38","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/app.71188","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148862341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of Size Effect and Compressive Failure Mechanism in Rigid Polyurethane Foam Under Uniaxial Compression Using CT Scanning Technology 基于CT扫描技术的硬质聚氨酯泡沫塑料单轴压缩尺寸效应及压缩破坏机制研究

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-09-01 Epub Date: 2026-07-18 DOI: 10.1002/app.71174

Mingyue Li, Wan Li, Jun Zhang, Wei Xu, Tian Wang, Kaiqing Chen

{"title":"Investigation of Size Effect and Compressive Failure Mechanism in Rigid Polyurethane Foam Under Uniaxial Compression Using CT Scanning Technology","authors":"Mingyue Li, Wan Li, Jun Zhang, Wei Xu, Tian Wang, Kaiqing Chen","doi":"10.1002/app.71174","DOIUrl":"https://doi.org/10.1002/app.71174","url":null,"abstract":"<div>\u0000 \u0000 <p>The absence of standardized specimen dimensions for uniaxial compression tests and the unclear compressive failure mechanism of rigid polyurethane foam (RPUF) as a backfill material remain significant challenges. This study investigates the compressive failure mechanisms of two RPUF types by employing X-ray computed tomography (CT) and scanning electron microscopy (SEM). The optimal specimen size for uniaxial compression tests was determined to be a cylinder with a diameter of 87 mm, height of 50 mm, and a height-to-diameter ratio of 0.57. CT-based 3D reconstruction revealed crack propagation paths and porosity distribution, while SEM analysis elucidated the relationship between pore morphology and fracture mechanisms. The results indicate that after compression, RPUF-IM exhibited brittle fracture with significant pore anisotropy, where the longitudinal equivalent pore diameter was 2.5 times larger than the transverse diameter, predisposing it to localized collapse. In contrast, RPUF-DS demonstrated plastic deformation capability, with a mere 10%–20% increase in longitudinal equivalent porosity compared to the transverse direction. Post-compression, pore closure and an increase in the proportion of smaller pores were observed in RPUF-DS, contributing to its superior mechanical performance. This study provides a theoretical and experimental basis for the engineering application of RPUF as a backfill material.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 38","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148862480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Sustainable Karaya Gum/Polyethylenimine Crosslinked Hydrogel for Anionic Dye Removal From Water: Adsorption Behavior and Machine Learning Prediction 一种可持续的卡拉亚胶/聚乙烯亚胺交联水凝胶去除水中阴离子染料：吸附行为和机器学习预测

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-08-21 Epub Date: 2026-07-09 DOI: 10.1002/app.71138

Zeineb Hamden, Mustafa R. Abdulbaqi, Tayel Abdul Ghani Al Hujran, Yousef A. Bin Jardan

{"title":"A Sustainable Karaya Gum/Polyethylenimine Crosslinked Hydrogel for Anionic Dye Removal From Water: Adsorption Behavior and Machine Learning Prediction","authors":"Zeineb Hamden, Mustafa R. Abdulbaqi, Tayel Abdul Ghani Al Hujran, Yousef A. Bin Jardan","doi":"10.1002/app.71138","DOIUrl":"https://doi.org/10.1002/app.71138","url":null,"abstract":"<div>\u0000 \u0000 <p>The release of anionic dyes from textile effluents threatens aquatic ecosystems and human health, creating a need for efficient and reusable adsorbents. In this study, a bio-based KG/PEI hydrogel was prepared by crosslinking Karaya gum (KG) with polyethylenimine (PEI) using glutaraldehyde. FTIR, XRD, SEM, and TGA confirmed successful crosslinking, enhanced thermal stability, and the formation of a porous, mostly amorphous network suitable for dye adsorption. Methyl orange (MO) was used as a model anionic dye to evaluate adsorption performance under different pH, contact time, dye concentration, and temperature conditions. The hydrogel showed higher adsorption capacity under acidic conditions due to protonation of PEI amine groups, which strengthened electrostatic attraction with MO sulfonate groups. The adsorption kinetics followed the pseudo-second-order model, while equilibrium data were best described by the Langmuir isotherm, giving a maximum experimental capacity of 284 mg/g and a theoretical monolayer capacity of 333 mg/g. Thermodynamic results indicated that adsorption was spontaneous and endothermic. The hydrogel retained about 73% of its initial efficiency after five reuse cycles. Machine-learning models further predicted adsorption capacity, with Gradient Boosting showing the best performance.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 37","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0