International Journal of Polymer Analysis and Characterization最新文献_第4页

Immobilization of α-amylase on electrospun polycaprolactone (PCL)/chitosan (CHI) nanofibers: a novel approach to improve enzyme stability and performance 静电纺聚己内酯/壳聚糖纳米纤维固定化α-淀粉酶：一种提高酶稳定性和性能的新方法

IF 1.6 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-10-03 Epub Date: 2025-05-22 DOI: 10.1080/1023666X.2025.2505204

Sevgi Balcıoğlu

{"title":"Immobilization of α-amylase on electrospun polycaprolactone (PCL)/chitosan (CHI) nanofibers: a novel approach to improve enzyme stability and performance","authors":"Sevgi Balcıoğlu","doi":"10.1080/1023666X.2025.2505204","DOIUrl":"10.1080/1023666X.2025.2505204","url":null,"abstract":"<div><div>Enhancing enzyme resistance to environmental conditions and optimizing their catalytic performance are crucial for various industrial applications. Enzyme immobilization has emerged as one of the most effective strategies to achieve these goals. In this study, polycaprolactone/chitosan (PCL/CHI) nanofibers were successfully synthesized via electrospinning, followed by the covalent immobilization of α-amylase. The immobilization efficiency was determined, and the resulting nanofibers were characterized through FT-IR, SEM, EDX, and XRD. Optimal pH and temperature conditions for the immobilized enzyme were found to be pH and 50 °C, respectively. The activation energy (Ea) calculated using the Arrhenius equation was 5.14 KJ/mol, while the kinetic parameters <em>K<sub>m</sub></em> and <em>Vmax</em> were determined as 0.37 ± 0.11 mg/mL and 6.23 ± 0.87 µmol/min, respectively. Thermal stability tests revealed that at 50 °C, the immobilized enzyme retained over 50% of its initial activity. Additionally, the immobilized enzyme exhibited enhanced resistance to environmental stressors, including metal ions and organic solvents, compared to its free counterpart. The results confirm that the immobilization process not only improves enzyme stability but also boosts catalytic efficiency under specific conditions. This study provides a cost-effective, scalable, and practical approach for enzyme immobilization using electrospinning, with significant potential for industrial applications.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 7","pages":"Pages 851-866"},"PeriodicalIF":1.6,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145195753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Poly(ethylene-co-methacrylic acid) ionomer dynamic phase composition and polymer chain mobility characterization by time domain NMR 聚乙烯-共甲基丙烯酸离聚体动态相组成及聚合物链迁移率的时域核磁共振表征

IF 1.6 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-10-03 Epub Date: 2025-07-29 DOI: 10.1080/1023666X.2025.2462057

Chen Zheng , Yifan Xu , Zheng Zhang , Qiangqiang Yan , Amy Song , Xiaohua Qiu , Nathan Rau , Ray Drumright

{"title":"Poly(ethylene-co-methacrylic acid) ionomer dynamic phase composition and polymer chain mobility characterization by time domain NMR","authors":"Chen Zheng , Yifan Xu , Zheng Zhang , Qiangqiang Yan , Amy Song , Xiaohua Qiu , Nathan Rau , Ray Drumright","doi":"10.1080/1023666X.2025.2462057","DOIUrl":"10.1080/1023666X.2025.2462057","url":null,"abstract":"<div><div>We report a convenient approach for characterizing poly(ethylene-co-methacrylic acid) (EMAA) using time domain NMR. The T<sub>2</sub> relaxation curve of EMAA can be obtained by the Carr-Purcell-Meiboom-Gill (CPMG) pulse sequence and analyzed with a three-component model. The dynamic phase distribution (the aggregation of relaxation components with similar mobility) and overall polymer chain mobility results showed good agreement with well-known EMAA ionomer properties and Hahn Echo pulse sequence experiments. Subsequently, plasticizer's impact on the EMAA network was studied with the method established here. Plasticizer-induced dynamic phase redistribution and chain mobility changes can be revealed by time domain NMR (TD NMR) analysis, enabling researchers to better understand the plasticizer–polymer interaction mechanism. In conclusion, TD NMR characterization of EMAA polymers provided a new perspective on the structural features and dynamics of these materials. The method has the potential to be adopted in R&D labs, processing labs, or plant quality assurance/quality control.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 7","pages":"Pages 867-876"},"PeriodicalIF":1.6,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145195754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced bioactivity of regenerated eggshell membrane hydrogels with strontium-doped hydroxyapatite for potential bone tissue regeneration 含锶羟基磷灰石的再生蛋壳膜水凝胶对骨组织再生的生物活性增强

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-08-18 Epub Date: 2025-05-03 DOI: 10.1080/1023666X.2025.2497389

Aakriti Aggarwal , Lajpreet Kaur , Debasish Nath , Himanshu Ojha , Asish Pal , Mahesh Kumar Sah

{"title":"Enhanced bioactivity of regenerated eggshell membrane hydrogels with strontium-doped hydroxyapatite for potential bone tissue regeneration","authors":"Aakriti Aggarwal , Lajpreet Kaur , Debasish Nath , Himanshu Ojha , Asish Pal , Mahesh Kumar Sah","doi":"10.1080/1023666X.2025.2497389","DOIUrl":"10.1080/1023666X.2025.2497389","url":null,"abstract":"<div><div>Tissue engineering has emerged as a promising alternative for bone repair. Avian eggshell membrane stands out among potential biomaterials due to its low immunogenicity, similarity to the extracellular matrix, and widespread availability. This study focuses on developing a bone ingrowth support system from a regenerated avian eggshell membrane. The collagenous and non-collagenous protein fractions were developed into hydrogels with poly-(vinyl alcohol) (PVA) via freeze-thawing, followed by their incorporation with hydroxyapatite and strontium-doped hydroxyapatite synthesized from the eggshell cuticle. Their physicochemical analysis revealed the biphasic nature of hydroxyapatite and Ca/P and (Ca + Sr)/P ratios of 1.25 and 1.27, respectively. The characterization with ATR-FTIR revealed the identification of amide I, amide III, and –OH functional groups at 1639 cm<sup>−1</sup>, 1264 cm<sup>−1</sup>, and 3308 cm<sup>−1</sup>, respectively, for all the hydrogels, along with a broad peak observed between 16° and 24° (2θ) in the XRD data. Evaluation of hydrogels’ morphology, degradation (40%−50%), swelling (162%−750%), mechanical properties (1.4 MPa–3.5 MPa), and biocompatibility with osteoblasts (>87%) demonstrated their suitability for bone regeneration. Further, histopathological examination of rat tibial bone demonstrated enhanced bone repair, with the findings strongly suggesting the potential application of the regenerated avian eggshell membrane in promoting bone regeneration.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 675-690"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tuning the properties of novel and biodegradable ethyl-cellulose (EC)/rGO nanocomposite 调整新型可生物降解乙基纤维素/氧化石墨烯纳米复合材料的性能

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-08-18 Epub Date: 2025-05-13 DOI: 10.1080/1023666X.2025.2502811

K. K. Khichar , Ravina , S. B. Dangi , S. Z. Hashmi , B. L. Choudhary , N. S. Leel , Saurabh Dalela , A. M. Quraishi , Shalendra Kumar , Balsam F. I. Sofi , Aakansha , P. A. Alvi

{"title":"Tuning the properties of novel and biodegradable ethyl-cellulose (EC)/rGO nanocomposite","authors":"K. K. Khichar ,  Ravina , S. B. Dangi , S. Z. Hashmi , B. L. Choudhary , N. S. Leel , Saurabh Dalela , A. M. Quraishi , Shalendra Kumar , Balsam F. I. Sofi ,  Aakansha , P. A. Alvi","doi":"10.1080/1023666X.2025.2502811","DOIUrl":"10.1080/1023666X.2025.2502811","url":null,"abstract":"<div><div>This study investigates the tunable properties of novel and biodegradable ethyl cellulose (EC)/reduced graphene oxide (rGO) nanocomposites by varying concentrations of rGO nanofillers. The EC/rGO nanocomposites were prepared by an uncomplicated chemical mixing route. The influence of rGO content on the structural, optical, and electrical properties of the nanocomposite was systematically studied. The obtained results reveal that the incorporation of rGO enhances the crystallite size with reduced dislocation density and micro-strain in the nanocomposites. The incorporation of rGO was found capable of reducing bandgaps significantly by a magnitude of ∼0.62 eV with an increase in Urbach energy of ∼0.76 eV and a less enhanced refractive index of the nanocomposite. Further, D, G, 2D, and (D + G) modes were found to be present to define the Raman spectra of the nanocomposites. From FTIR spectra, the presence of C–H, C = O, and C–O stretching vibrations in the composite was confirmed. Moreover, electrical constraints, such as dielectric constant, dissipation factor, and ac and dc conductivity, along with frequency exponent, were found to be enhanced by increasing the strength of the incorporated rGO nanofiller. Thus, the findings provide critical insights into the design of biodegradable and multifunctional nanocomposites, paving the way for their application in sustainable packaging, electronics, and biomedical devices.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 711-727"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of physical and mechanical and tribological characteristics of poly methyl methacrylate denture based composites doped with nano ceramic particles: a review 掺杂纳米陶瓷颗粒的聚甲基丙烯酸甲酯义齿基复合材料的物理力学和摩擦学特性评价

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-08-18 Epub Date: 2025-06-03 DOI: 10.1080/1023666X.2025.2504552

Dinesh Kumar Patel , Sachin Kumar , Gaurav Nandan , Shiv Ranjan Kumar

{"title":"Assessment of physical and mechanical and tribological characteristics of poly methyl methacrylate denture based composites doped with nano ceramic particles: a review","authors":"Dinesh Kumar Patel , Sachin Kumar , Gaurav Nandan , Shiv Ranjan Kumar","doi":"10.1080/1023666X.2025.2504552","DOIUrl":"10.1080/1023666X.2025.2504552","url":null,"abstract":"<div><div>Poly methyl methacrylate (PMMA) is the most often used acrylic for partial and full dentures. Denture fractures are induced by fatigue as a result of repeated masticatory, flexural, and impact stresses. PMMA’s remarkable qualities, such as beauty, cost-effectiveness, ease of manipulation, low density, and tunable mechanical properties, make it an ideal option for use in dentistry. The durability of pure PMMA is improved by incorporating appropriate weight percentages of nano reinforcement of ceramic material. The doping of nano-reinforcement materials enhances the tensile strength, compressive strength, micro-hardness; flexural strength, yield strength, impact strength, transverse strength, thermal expansion coefficient and decreases water sorption of PMMA composites investigated by different researchers. This study explores how the biopolymer matrix (PMMA) is affected by aluminum oxide (Al<sub>2</sub>O<sub>3</sub>), zirconium oxide (ZrO<sub>2</sub>), and titaniun dioxide (TiO<sub>2</sub>) reinforcements in terms of mechanical, physical, and tribological characteristics of PMMA dental composites. Additionally, the applications of polymer- based composites are explored.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 740-759"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The relationship between thermal, rheological, and tack properties of copolyester-based hot melt adhesives 共聚酯基热熔胶的热、流变和粘性之间的关系

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-08-18 Epub Date: 2025-05-16 DOI: 10.1080/1023666X.2025.2501584

Michał Misiak , Paulina Latko-Durałek , Maria Mercedes Fernandez , Jorge L. Olmedo-Martínez , Dorota Kołbuk , Żaneta Górecka , Amir Malmir , Paulina Kozera , Alejandro J. Müller , Savvas G. Hatzikiriakos , Anna Boczkowska

{"title":"The relationship between thermal, rheological, and tack properties of copolyester-based hot melt adhesives","authors":"Michał Misiak , Paulina Latko-Durałek , Maria Mercedes Fernandez , Jorge L. Olmedo-Martínez , Dorota Kołbuk , Żaneta Górecka , Amir Malmir , Paulina Kozera , Alejandro J. Müller , Savvas G. Hatzikiriakos , Anna Boczkowska","doi":"10.1080/1023666X.2025.2501584","DOIUrl":"10.1080/1023666X.2025.2501584","url":null,"abstract":"<div><div>This paper studies the interrelationships between the molecular weight, rheology, crystallinity, and tackiness of three types of commercial thermoplastic hot melt adhesives. The hot melt adhesives employed here differ in their compositions and molecular weights, even though all are copolyesters primarily based on poly(butylene terephthalate). Differences in the composition were found to influence the adhesives’ crystallization and melting behavior. These structural variations can translate into different thermal responses and processing characteristics relevant for tailoring adhesive selection to application requirements. Furthermore, adhesives with higher molecular weight were observed to possess larger elasticity, leading to significantly enhanced tackiness properties, as evidenced by the higher values of tensile modulus, peak stress, and work of debonding. This elevated tackiness was linked to the increased fibrillation process observed in polymers with higher molecular weights. Additionally, all tested adhesives exhibited storage moduli below the Dahlquist threshold (G′ < 3.3 × 10<sup>5</sup> Pa), which supports their ability to achieve measurable tackiness during the initial bonding process. The results presented in this study underscore the diversity among hot melt adhesives and the critical properties that should be considered when selecting adhesives for specific applications.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 691-710"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and characterization of a set of novel copolymers by using RAFT polymerization method and “grafting through” strategy RAFT聚合和接枝共聚物的合成及表征

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-08-18 Epub Date: 2025-05-13 DOI: 10.1080/1023666X.2025.2502819

Bedrettin Savaş , Abdullah Karanfil , Efkan Çatıker , Temel Öztürk

{"title":"Synthesis and characterization of a set of novel copolymers by using RAFT polymerization method and “grafting through” strategy","authors":"Bedrettin Savaş , Abdullah Karanfil , Efkan Çatıker , Temel Öztürk","doi":"10.1080/1023666X.2025.2502819","DOIUrl":"10.1080/1023666X.2025.2502819","url":null,"abstract":"<div><div>This study synthesized a series of novel copolymers by introducing the polyethylene glycol segments to the polymethyl methacrylate skeleton. For this purpose, S,S’-(ethane-1,2-diyl) O,O’-diethyl bis(carbonodithioate), named RAFT agent, was synthesized by reacting 1,2-dibromoethane with potassium ethyl xanthogenate. Poly(methyl methacrylate-co-polyethylene glycol monomethyl ether monomethacrylate) [poly(MMA-co-PEGMMA)] copolymer was synthesized by reversible addition-fragmentation chain transfer polymerization (RAFT) method and the “grafting through” strategy using the RAFT agent, methyl methacrylate, and different lengths (Mw of PEG unit = 200, 400, and 1000 g.mol<sup>−1</sup>) of polyethylene glycol monomethyl ether monomethacrylate (PEGMMA) as macromonomers. The three copolymers of poly(MMA-co-PEGMMA) with three different grafting degrees (5, 10, and 20% by mass) were obtained successfully. Structural and thermal features of poly(MMA-co-PEGMMA) copolymers were examined using FT-IR, <sup>1</sup>H-NMR, GPC, TGA, and DSC methods.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 728-739"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, mechanical, thermal characterizations of Agave sisalana fiber- reinforced composite and finite element analysis of composite helical compression spring 龙舌兰纤维增强复合材料的结构、力学、热特性及复合螺旋压缩弹簧的有限元分析

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-08-18 Epub Date: 2025-05-06 DOI: 10.1080/1023666X.2025.2496306

C. Balaji Ayyanar , N. Sridhar , T. Mugilan , S. K. Pradeepmohan

{"title":"Structural, mechanical, thermal characterizations of Agave sisalana fiber- reinforced composite and finite element analysis of composite helical compression spring","authors":"C. Balaji Ayyanar , N. Sridhar , T. Mugilan , S. K. Pradeepmohan","doi":"10.1080/1023666X.2025.2496306","DOIUrl":"10.1080/1023666X.2025.2496306","url":null,"abstract":"<div><div>Despite having been studied in a range of applications, the use of sisal fiber-reinforced composites in helical compression springs is rare. Thus, this particular study shows the feasibility of replacing conventional metal springs with lightweight composite springs in the interest of furthering sustainable engineering. This study focused on the successful fabrication of a helical compression spring using the filament winding process – a method not very commonly applied to such components. The tensile strength of 66.74 MPa and flexural strength of 70.47 MPa composite specimens were found. The surface morphology and elemental compositions of the composite were found through FESEM and EDX. The DSC analysis found the onset temperature of the thermal event begins at 351.7 °C and ends at 392.8 °C. The area under the peak, representing the energy absorbed, is 100.4 J/g, indicating the amount of heat involved during crosslinking of the composite matrix. The TG analysis revealed the stability of the composite from ∼30 °C to ∼300 °C. Around 300 °C, there is a significant drop in residual weight, indicating decomposition of the composite. The helical compression spring was designed and fabricated through the filament winding process. A 3D model of the spring was developed using SolidWorks and finite element analysis (FEA) of the spring was done using ANSYS. The results revealed a maximum stiffness of 1.87 N/mm at 35 N, validating the material for low-strength applications. Future work should optimize fiber–matrix interaction and study the proposed composite for lightweight suspension systems, vibration-damping components, and other eco-friendly options in the automotive industries.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 650-665"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dielectric and thermal behavior analysis of polyester composites filled with pineapple wood dust using finite element method 菠萝木屑填充聚酯复合材料介电和热行为的有限元分析

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-08-18 Epub Date: 2025-05-15 DOI: 10.1080/1023666X.2025.2496319

Bishnupriya Sahoo , Priyabrat Pradhan , Abhilash Purohit , Hemalata Jena , Bibhuti Bhusan Sahoo

{"title":"Dielectric and thermal behavior analysis of polyester composites filled with pineapple wood dust using finite element method","authors":"Bishnupriya Sahoo , Priyabrat Pradhan , Abhilash Purohit , Hemalata Jena , Bibhuti Bhusan Sahoo","doi":"10.1080/1023666X.2025.2496319","DOIUrl":"10.1080/1023666X.2025.2496319","url":null,"abstract":"<div><div>This study examines the dielectric and thermal characterization of pineapple wood dust (PWD)-filled polymer composites using the finite element method and experimental analysis. PWD was reinforced with polyester resin with different weight (0–25 wt. %) and volume (0–17.95 vol. %) percentages. Thermal conductivity tests were conducted as per the ASTM E-1530 in a Unitherm<sup>™</sup> 2022 model, whereas the dielectric properties were tested with the help of an HP LCR impedance analyzer and an HP 16451B dielectric tester. The experimental result showed a decrease in thermal conductivity values of polyester resin from 0.342 to 0.245 W/m-K with the inclusion of 17.95 vol. % PWD, which ensured enhanced thermal insulation. Further, the thermal conductivity values obtained from finite element analysis simulated using Digimat software were in good agreement with experimental values, and the error lies in between 1% and 10%. The experimental result showed a decrease in thermal conductivity values with increased PWD loading, which ensured enhanced thermal insulation. Further, the thermal conductivity values obtained from finite element analysis simulated using Digimat software were in good agreement with experimental values. The finite element analysis also revealed a decrease in heat flux density with the addition of PWD particles. The dielectric constant of the composites was found to be higher at lower frequencies and decreased with increasing frequency, which can be attributed to various polarization mechanisms. The dielectric constant of polyester resin also increased gradually with the addition of 25 wt. % PWD filler content from 1.4 to 2.7 at 1 MHz frequency.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 666-674"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biofilm-resistant urethane-linked poly(methoxyethyl acrylate) copolymer films with enhanced durability and self-healing capabilities 生物膜抵抗聚氨酯连接聚（甲氧基乙基丙烯酸酯）共聚物膜增强耐久性和自愈能力

IF 1.7 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2025-08-18 Epub Date: 2025-06-06 DOI: 10.1080/1023666X.2025.2496301

Sana Ahmed , Jongho Jeon

{"title":"Biofilm-resistant urethane-linked poly(methoxyethyl acrylate) copolymer films with enhanced durability and self-healing capabilities","authors":"Sana Ahmed , Jongho Jeon","doi":"10.1080/1023666X.2025.2496301","DOIUrl":"10.1080/1023666X.2025.2496301","url":null,"abstract":"<div><div><em>2-Methoxyethyl acrylate</em> draws significant interest for its exceptional biofilm-resistant properties, but its interaction with other monomers complicates outcome predictions during polymerization. To investigate these mechanisms, we synthesized biofilm-resistant prepolymers, HMEA and GMEA, using free radical polymerization (FRP). Gelation issues caused by the intramolecular crosslinking were mitigated by introducing styrene spacers, yielding a new set of additional prepolymers, HSMEA and GSMEA. Crosslinking with an aliphatic isocyanate (HDI) in the presence of a dibutyltin dilaurate (DTBDL) catalyst successfully formed urethane linkages, which were confirmed by attenuated total reflectance fourier transform infrared (FTIR) spectroscopy and differential scanning calorimetry (DSC) analysis. Overall, this crosslinking significantly reduced the exposed OH groups and enhanced the hydrophobicity of the polymers. Both cGMEA and cGSMEA displayed exceptional antibiofouling behavior as demonstrated by their resistance to bovine serum albumin (BSA). Mechanical tests demonstrated superior properties with tensile strengths of 4.1 MPa and 3.6 MPa and impressive elongation strains of 223% and 425%, respectively. This work reports one of its kind <em>2-Methoxyethyl acrylate</em>-based polymer consisting of reversible urethane bonds providing self-healing capabilities and enhanced durability as a coating material. However, further investigation into the underlying mechanisms of these synergistic effects will be critical to fully harness the potential of methoxyethyl acrylate-based polymers.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 631-649"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0