Journal of Applied Polymer Science最新文献_第7页

Ba, Nb Co-Doped LLZO Reinforced PEO Composite Solid Electrolyte for High-Performance Solid-State Lithium Batteries Ba， Nb共掺LLZO增强PEO复合固体电解质用于高性能固态锂电池

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2026-03-21 Epub Date: 2026-02-12 DOI: 10.1002/app.70571

Haihua Wang, Haonan Wang, Kewei Shu, Chaoxian Chen, Qing Liu, Rui Cao, Jiaheng Li, Xing Yang, Zhuyu Li

{"title":"Ba, Nb Co-Doped LLZO Reinforced PEO Composite Solid Electrolyte for High-Performance Solid-State Lithium Batteries","authors":"Haihua Wang, Haonan Wang, Kewei Shu, Chaoxian Chen, Qing Liu, Rui Cao, Jiaheng Li, Xing Yang, Zhuyu Li","doi":"10.1002/app.70571","DOIUrl":"https://doi.org/10.1002/app.70571","url":null,"abstract":"<div>\u0000 \u0000 Owing to its high lithium-ion conductivity, the cubic garnet-phase material Li7La3Zr2O12 (LLZO) is a widely adopted key component in the fabrication of composite solid-state electrolytes (CSSEs). Nevertheless, the advancement of all-solid-state lithium batteries (ASSLBs) is still hindered by two major challenges: the high intrinsic crystallinity of poly(ethylene oxide) (PEO) and poor interfacial stability. Herein, cubic garnet Li6.3La2.7Ba0.3ZrNbO12 (LLBZNO) featuring Ba and Nb co-doping was first prepared by a conventional solid-state method. Following this, the material was dispersed within a PEO matrix to construct composite solid-state electrolytes. Adding LLBZNO served to decrease PEO's crystallinity while enhancing its mechanical flexibility and bolstering its interfacial compatibility with lithium metal. The optimized membrane demonstrated superior properties, including a high Li+ transference number of 0.75 (at 60°C) and an extended electrochemical stability window of up to 5.1 V (vs. Li/Li+) under the present testing conditions. It also showed an excellent ability to suppress dendrites, facilitating stable cycling at 0.1 mA cm−2 for 1500 h without short-circuiting. Furthermore, the LFP/LLBZNO–PEO/Li battery delivered a high discharge capacity of 101.6 mA h g−1 after 300 cycles at 1°C with nearly 99% coulombic efficiency. These findings highlight that LLBZNO-PEO composite solid electrolytes possess superior ionic transport, electrochemical stability, and mechanical robustness, providing a viable pathway toward the advancement of next-generation high-performance ASSLBs.\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 17","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147564962","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

Effect of Inorganic Fillers on the Physico-Mechanical and Morphological Properties of Bamboo Fiber Reinforced Epoxy Composites 无机填料对竹纤维增强环氧复合材料物理力学和形态性能的影响

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2026-03-21 Epub Date: 2026-02-13 DOI: 10.1002/app.70564

Hayat Mahmud, Rubaiya Khan, Arup Kumar Debnath, Md. Abdul Hasib

{"title":"Effect of Inorganic Fillers on the Physico-Mechanical and Morphological Properties of Bamboo Fiber Reinforced Epoxy Composites","authors":"Hayat Mahmud, Rubaiya Khan, Arup Kumar Debnath, Md. Abdul Hasib","doi":"10.1002/app.70564","DOIUrl":"https://doi.org/10.1002/app.70564","url":null,"abstract":"<div>\u0000 \u0000 This study investigated the impact of different inorganic oxide fillers (CuO, TiO2, Al2O3, and MgO) on the mechanical, physical, and morphological properties of bamboo fiber-reinforced epoxy composites. Bamboo fiber-based composites are sustainable materials valued for their mechanical performance (high specific strength) and renewability. This work provided a comparative performance–sustainability analysis of these specific metal oxide/bamboo systems for engineering applications. To address the research objectives, woven bamboo mats were prepared using a hand-operated weaving technique, followed by a hand lay-up process to fabricate composites with a 1 wt.% filler-dispersed epoxy matrix. Tensile, flexural, impact, and hardness tests were conducted to evaluate mechanical performance, while physical properties were assessed through water absorption, density, and porosity measurements. Among the variants, the MgO reinforced composite significantly outperformed in mechanical tests, especially exhibiting approximately 84.38% and 54.36% improvements in tensile and flexural strength, respectively, and 50% enhancement in impact strength compared to the control sample. This composite also displayed the highest hardness. Additionally, the CuO-incorporated composite consumed less water both at room temperature and in a neutral pH medium. Morphological analysis via scanning electron microscopy (SEM) revealed superior interfacial bonding and uniform filler distribution in the MgO-filled samples, consistent with the observed mechanical gains. Overall, the results indicate that MgO is the most effective inorganic oxide filler for enhancing the mechanical, physical, and morphological properties of bamboo fiber reinforced epoxy composites.\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 17","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565559","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

Effect of Waste Glass Powder on Thermal, Electrical and Mechanical Properties of Shellac Composites 废玻璃粉对紫胶复合材料热、电、力学性能的影响

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2026-03-21 Epub Date: 2026-02-09 DOI: 10.1002/app.70552

Monika Chaparia, Deepak Awana, Kanhaiya Lal Sikhwal, Ambesh Dixit, Umesh Kumar Dwivedi

{"title":"Effect of Waste Glass Powder on Thermal, Electrical and Mechanical Properties of Shellac Composites","authors":"Monika Chaparia, Deepak Awana, Kanhaiya Lal Sikhwal, Ambesh Dixit, Umesh Kumar Dwivedi","doi":"10.1002/app.70552","DOIUrl":"https://doi.org/10.1002/app.70552","url":null,"abstract":"<div>\u0000 \u0000 This study investigates the influence of waste glass powder on the electrical, thermal, mechanical, and dielectric properties of shellac-based composites. Shellac is a natural biopolymer with excellent film-forming ability and water repellence; however, its practical applications are limited by poor thermal stability. To overcome this limitation, waste glass powder was incorporated into the shellac matrix in varying proportions. The Shore-A hardness increased significantly from ~67 for pure shellac to ~94 for the composite containing 60 wt.% glass powder, while density increased from 1.10 to 1.61 g/cm3. Tensile testing revealed optimum mechanical performance, with a maximum tensile strength of 3.38 N/mm2 at 30 wt.% glass powder, representing an approximately 6.4-fold enhancement over pristine shellac. The dielectric constant increased from ~3.5 for pure shellac to ~7.8 for the 60 wt.% glass-filled composite and remained functionally stable up to ~130°C. Thermogravimetric and differential scanning calorimetry analyses confirmed improved thermal stability and delayed degradation compared to neat shellac, with the glass transition (softening) temperature increasing from ~49°C to ~61°C. Overall, the results demonstrate that waste glass powder effectively improves the performance of shellac composites. To the best of our knowledge, this is the first systematic study demonstrating waste-glass-reinforced shellac composites.\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 17","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147564241","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

The Effect of Nanoclay Particles on the Rheological and Mechanical Properties of Polyamide 12 and Waste Rubber Composites 纳米粘土颗粒对聚酰胺12和废橡胶复合材料流变学和力学性能的影响

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2026-03-21 Epub Date: 2026-02-24 DOI: 10.1002/app.70568

Friday Nwankwo Archibong, Nourredine Aït Hocine, Pascal Médéric, Michel Gratton, Martha Chilee Ekwedigwe, Obisi Matthias Nweke, Valentine Isdore Nwachukwu

{"title":"The Effect of Nanoclay Particles on the Rheological and Mechanical Properties of Polyamide 12 and Waste Rubber Composites","authors":"Friday Nwankwo Archibong, Nourredine Aït Hocine, Pascal Médéric, Michel Gratton, Martha Chilee Ekwedigwe, Obisi Matthias Nweke, Valentine Isdore Nwachukwu","doi":"10.1002/app.70568","DOIUrl":"https://doi.org/10.1002/app.70568","url":null,"abstract":"<div>\u0000 \u0000 Recycling discarded rubber is essential for environmental preservation and human health. The study examines the improvement of end-use properties by combining old rubber with thermoplastics in thermoplastic/waste rubber composites, produced using a Haake Rheomix 600 mixer with organically modified montmorillonite (OMMT), polyamide 12 (PA12), and ethylene propylene diene monomer (EPDM). It reveals that at a 2% OMMT mass fraction, the PA12/OMMT nanocomposite displays solid-like characteristics. A threshold is identified around 2% clay mass fraction, differentiating stable Young's modulus from declines in properties at higher mass fractions, while lower fractions enhance mechanical characteristics. The study also notes that the ternary nanocomposite's EPDM slightly disrupts the binary's percolation network, and a small decrease in the glass transition temperature (T\u0000 \u0000 g\u0000 ) indicates improved interfacial interactions, enhancing Young's modulus. The ability of OMMT to act as a dispersing agent comprises the study's main breakthrough. Overall, the ternary nanocomposite demonstrates comparable Young's modulus to the binary version, underscoring the potential for recycling rubber waste.\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 17","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147568287","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

High-Performance Self-Lubricating Epoxy Composites Using Bioinspired Silica Microcapsules: Interfacial Engineering and Tribological Performance 使用生物硅微胶囊的高性能自润滑环氧复合材料：界面工程和摩擦学性能

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2026-03-21 Epub Date: 2026-02-09 DOI: 10.1002/app.70556

Jun-Feng Su, Xiao-Nan Su, Xin-Yu Wang, Qin-Yu Xing, Peng Yang, Zhi-Yong Tan

{"title":"High-Performance Self-Lubricating Epoxy Composites Using Bioinspired Silica Microcapsules: Interfacial Engineering and Tribological Performance","authors":"Jun-Feng Su, Xiao-Nan Su, Xin-Yu Wang, Qin-Yu Xing, Peng Yang, Zhi-Yong Tan","doi":"10.1002/app.70556","DOIUrl":"https://doi.org/10.1002/app.70556","url":null,"abstract":"<div>\u0000 \u0000 This study introduces high-performance self-lubricating epoxy composites incorporating bioinspired silica microcapsules. Fabricated via optimized oil-in-water emulsion, the microcapsules (8–22 μm diameter, 0.5–0.6 μm shell thickness) demonstrate excellent thermal stability (200°C for 1 h) and high polyalphaolefin (PAO) encapsulation efficiency. At 5.0 wt% loading, the composite achieves outstanding tribological performance with an 89% reduction in both friction coefficient (from 0.56 to 0.08) and wear rate (from 120 to 13 × 10−6 mm3/Nm) under 5 N load, while retaining 85% of compressive strength. Microstructural analysis confirms uniform microcapsule dispersion and strong interfacial adhesion with the epoxy matrix. The composite exhibits a unique stress-responsive lubrication mechanism where mechanical triggers cause microcapsule rupture, releasing PAO to form continuous lubricating films combined with silica fragments. This dynamic process is quantitatively described by a conceptual kinetic framework model that accounts for stress-dependent rupture and lubricant entrainment. The excellent balance of tribological properties and mechanical integrity demonstrated under laboratory conditions makes these composites promising candidates for further investigation toward demanding applications.\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 17","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147564242","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

Engineering Electrospun PCL/PEO Membranes With ECM-Like Architecture and Tunable Hydrophilicity as Functional Wound Dressings 具有ecm样结构和可调亲水性的静电纺PCL/PEO膜作为功能性伤口敷料

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2026-03-21 Epub Date: 2026-02-09 DOI: 10.1002/app.70557

Ronaldo Bianchini da Silveira, Maria Fernanda Pedro Ebs, Renata Bochanoski, Mateus de Assunção Hofmann, Oscar Rubem Klegues Montedo, Thauan Gomes, Sabrina Arcaro

{"title":"Engineering Electrospun PCL/PEO Membranes With ECM-Like Architecture and Tunable Hydrophilicity as Functional Wound Dressings","authors":"Ronaldo Bianchini da Silveira, Maria Fernanda Pedro Ebs, Renata Bochanoski, Mateus de Assunção Hofmann, Oscar Rubem Klegues Montedo, Thauan Gomes, Sabrina Arcaro","doi":"10.1002/app.70557","DOIUrl":"https://doi.org/10.1002/app.70557","url":null,"abstract":"Skin injuries resulting from trauma, burns, or chronic conditions such as diabetes often require advanced medical interventions, as conventional dressings provide only passive protection with limited exudate absorption and minimal contribution to healing. In this study, electrospun poly(ε-caprolactone)/poly(ethylene oxide) (PCL/PEO) membranes were engineered to couple extracellular matrix (ECM)-like architecture with tunable wettability, fluid absorption, and degradation to achieve enhanced wound closure. By adjusting electrospinning parameters, uniform fibers (2.4–7.4 μm) with porosity of 63%–77% and pore sizes of 17–25 μm were obtained. FTIR analysis confirmed the successful blend of PCL and PEO, while wettability, fluid absorption, and membrane degradation increased proportionally with PEO content; the optimized PCL7:1PEO membrane exhibited a contact angle below 60° and fluid uptake of 361%. Biological assays demonstrated preserved cytocompatibility and enhanced fibroblast migration, achieving wound closure of 86.8% ± 14.6% for PCL7:1PEO compared with 68.3% ± 7.7% for pristine PCL and 75.6% ± 3.8% for the control. These findings highlight the potential of PCL/PEO electrospun membranes as functional wound dressings, offering prolonged use, improved fluid management, and a favorable microenvironment for tissue repair, representing a promising alternative to conventional treatments.","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 17","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/app.70557","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147564442","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

Preparation and Gas Separation Performance of Ionic Liquid Modified Covalent Organic Framework/Fluorinated Polyimide Mixed Matrix Membranes 离子液体改性共价有机骨架/氟化聚酰亚胺混合基质膜的制备及气体分离性能

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2026-03-21 Epub Date: 2026-02-09 DOI: 10.1002/app.70563

Shanshan Wu, Chao Shan, Junhao Mo, Junjie Qu, Chanjuan Liu, Xiaohua Huang

{"title":"Preparation and Gas Separation Performance of Ionic Liquid Modified Covalent Organic Framework/Fluorinated Polyimide Mixed Matrix Membranes","authors":"Shanshan Wu, Chao Shan, Junhao Mo, Junjie Qu, Chanjuan Liu, Xiaohua Huang","doi":"10.1002/app.70563","DOIUrl":"https://doi.org/10.1002/app.70563","url":null,"abstract":"<div>\u0000 \u0000 In this work, a novel fluorinated diamine monomer, 3-methoxy-4-fluoro-4,4′-diaminotriphenylamine (FMBDA), was synthesized through molecular design. And then copolymerized with 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and 4,4′-oxydianiline (ODA) to prepare fluorinated polyimide (FPI). Subsequently, the covalent organic framework (TpDT) was modified with the imidazolium ionic liquid [Emim][Tf2N] (IL) via solution impregnation, and the resulting IL@TpDT was doped into FPI to prepare IL@TpDT/FPI mixed matrix membranes (MMMs) with varying mass fractions. The obtained MMMs exhibited excellent thermal properties (T\u0000 g > 295°C, T\u0000 10% > 528°C), commendable mechanical properties (tensile strength > 81.08 MPa), and outstanding hydrophobic properties (contact angle > 86.90°). IL modification endows TpDT with improved CO2 affinity and a smaller pore size, thereby enhancing the membrane material CO2 adsorption selectivity. Simultaneously, the porous structure of the nanocomposite boosts gas adsorption and diffusion, further improving gas separation performance. At an IL@TpDT loading of 3 wt%, CO2 and O2 permeability increased by 222% and 123%, respectively, compared to the FPI matrix membrane. The CO2/N2 and O2/N2 separation factors rose to 27.27 and 4.81, respectively.\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 17","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147564443","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

Effects of Thickness on Time-Dependent Diffusivity and Water Absorption in Polymethyl Methacrylate (PMMA): Experimental and Analytical Studies 厚度对聚甲基丙烯酸甲酯（PMMA）随时间扩散率和吸水率的影响：实验和分析研究

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2026-03-21 Epub Date: 2026-02-12 DOI: 10.1002/app.70558

Waqas Ahmed, Hui Li, Jun Liu, Xinyu Yang, Daxu Zhang, Mudassir Iqbal

{"title":"Effects of Thickness on Time-Dependent Diffusivity and Water Absorption in Polymethyl Methacrylate (PMMA): Experimental and Analytical Studies","authors":"Waqas Ahmed, Hui Li, Jun Liu, Xinyu Yang, Daxu Zhang, Mudassir Iqbal","doi":"10.1002/app.70558","DOIUrl":"https://doi.org/10.1002/app.70558","url":null,"abstract":"<div>\u0000 \u0000 Polymethyl methacrylate (PMMA) is widely used in medical, marine, and engineering structures due to its excellent physical and mechanical properties. However, its susceptibility to water absorption threatens long-term performance and dimensional stability, necessitating a thorough understanding of its water absorption behavior. This study investigates the effects of specimen thickness on the time-dependent diffusivity and water absorption behavior of PMMA. Experiments were conducted on samples with five different thicknesses (3.2, 6.4, 9.6, 12.8 and 16.0 mm) to analyze absorption kinetics and determine diffusion coefficients. Results confirmed Fickian diffusion behavior and revealed that thinner specimens reached saturation faster and absorbed a higher final moisture content (1.13% vs. 0.74% for the thickest specimen), demonstrating an inverse relationship between thickness and total water uptake. A critical finding was the non-steady nature of the diffusion coefficient, which was found to be dependent on both thickness and exposure time, exhibiting an initial high value that decayed as saturation approached. A novel three-dimensional model derived from Fick's second law successfully captured this time-dependent diffusion as well as accurately predicted water uptake. Accurate experimental validation confirms the model's utility as a predictive tool for assessing PMMA's long-term sorption kinetics in water-exposed applications.\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 17","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565057","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

Effects of Thickness on Time-Dependent Diffusivity and Water Absorption in Polymethyl Methacrylate (PMMA): Experimental and Analytical Studies 厚度对聚甲基丙烯酸甲酯（PMMA）随时间扩散率和吸水率的影响：实验和分析研究

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2026-03-21 Epub Date: 2026-02-12 DOI: 10.1002/app.70558

Waqas Ahmed, Hui Li, Jun Liu, Xinyu Yang, Daxu Zhang, Mudassir Iqbal

{"title":"Effects of Thickness on Time-Dependent Diffusivity and Water Absorption in Polymethyl Methacrylate (PMMA): Experimental and Analytical Studies","authors":"Waqas Ahmed, Hui Li, Jun Liu, Xinyu Yang, Daxu Zhang, Mudassir Iqbal","doi":"10.1002/app.70558","DOIUrl":"https://doi.org/10.1002/app.70558","url":null,"abstract":"<div>\u0000 \u0000 Polymethyl methacrylate (PMMA) is widely used in medical, marine, and engineering structures due to its excellent physical and mechanical properties. However, its susceptibility to water absorption threatens long-term performance and dimensional stability, necessitating a thorough understanding of its water absorption behavior. This study investigates the effects of specimen thickness on the time-dependent diffusivity and water absorption behavior of PMMA. Experiments were conducted on samples with five different thicknesses (3.2, 6.4, 9.6, 12.8 and 16.0 mm) to analyze absorption kinetics and determine diffusion coefficients. Results confirmed Fickian diffusion behavior and revealed that thinner specimens reached saturation faster and absorbed a higher final moisture content (1.13% vs. 0.74% for the thickest specimen), demonstrating an inverse relationship between thickness and total water uptake. A critical finding was the non-steady nature of the diffusion coefficient, which was found to be dependent on both thickness and exposure time, exhibiting an initial high value that decayed as saturation approached. A novel three-dimensional model derived from Fick's second law successfully captured this time-dependent diffusion as well as accurately predicted water uptake. Accurate experimental validation confirms the model's utility as a predictive tool for assessing PMMA's long-term sorption kinetics in water-exposed applications.\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 17","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565058","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

Harnessing an Eco-Friendly P–N Monocomponent Derived From Phytic Acid for Superior Fire Protection of Epoxy Resins 利用植酸衍生的生态友好型P - N单组分用于环氧树脂的优越防火性能

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2026-03-21 Epub Date: 2026-02-11 DOI: 10.1002/app.70559

Jiajing Yu, Liping Yuan, Yi Sun, Shiyan Zhang, Chengjin Tan, Qianyu Zhou, Youhua Fan

{"title":"Harnessing an Eco-Friendly P–N Monocomponent Derived From Phytic Acid for Superior Fire Protection of Epoxy Resins","authors":"Jiajing Yu, Liping Yuan, Yi Sun, Shiyan Zhang, Chengjin Tan, Qianyu Zhou, Youhua Fan","doi":"10.1002/app.70559","DOIUrl":"10.1002/app.70559","url":null,"abstract":"<div>\u0000 \u0000 Improving the flame retardancy of epoxy resin (EP) is an imperative yet challenging task for its applications in electronic packaging and aerospace. In this study, a novel bio-based phosphorus–nitrogen flame retardant (PTM) was successfully synthesized from phytic acid (PA), 1,3,5-tris(2-hydroxyethyl) cyanuric acid (THEIC), and melamine (MEL) and added to EP to further prepare PTM/EP composites. The chemical compositions and bonding states characterized by Fourier transform infrared (FTIR), liquid nuclear magnetic resonance (NMR), and X-ray photoelectron spectroscopy (XPS), confirmed the flame-retardant constituents of PTM. Compared with pure EP, the PTM/EP5 composite demonstrated superior flame retardancy and smoke suppression, achieving a UL-94 V-0 rating and a high limiting oxygen index (LOI) of 34.0%. Additionally, the peak heat release rate (pHRR), total heat release (THR), and total smoke release (TSP) of the PTM/EP5 composite decreased by 84.33%, 62.04%, and 66.67%, respectively. The impressive flame retardancy and smoke suppression performance of PTM/EP were attributed to the phosphorus–nitrogen synergistic intumescent mechanism facilitated by PTM. This study provides an effective and sustainable flame-retardant strategy for EP composites, offering new insights into the green development of P–N flame-retardant systems.\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 17","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147381845","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