Polymers最新文献_第4页

Evaluation and Optimization of Thermoplastic Extrusion Parameters Influencing the Impact Resistance of Additively Manufactured Samples from PETG and Recycled PETG. 影响PETG和回收PETG增材制样抗冲击性能的热塑性挤出工艺参数评价与优化

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-19 DOI: 10.3390/polym17182533

Dragos Gabriel Zisopol, Mihail Minescu, Dragos Valentin Iacob

{"title":"Evaluation and Optimization of Thermoplastic Extrusion Parameters Influencing the Impact Resistance of Additively Manufactured Samples from PETG and Recycled PETG.","authors":"Dragos Gabriel Zisopol, Mihail Minescu, Dragos Valentin Iacob","doi":"10.3390/polym17182533","DOIUrl":"10.3390/polym17182533","url":null,"abstract":"Given the widespread use of additive manufacturing technologies through plastic extrusion and the need to use recycled plastic materials, this paper presents the results of the study on the evaluation and optimization of the influence of theromoplastic extrusion parameters on the impact resistance of additively manufactured samples from PETG and recycled PETG (rPETG) filament from the Everfil brand. In this context, 90 impact samples, 45 from PETG and 45 from rPETG, were additively manufactured by thermoplastic extrusion by the QIDI Q1 Pro printer, with the layer height deposited per pass Lh = 0.10/0.15/0.20 mm and the filling percentage Id = 50/75/100%, which were subsequently subjected to impact testing by the HST XJJD-50T machine, using the 7.5J hammer and the impact speed of 2.9 m/s. In order to statistically evaluate the influence of the variable parameters of thermoplastic extrusion, layer height per pass (Lh) and filling percentage (Id), on the impact strengths of additively manufactured PETG and rPETG samples, ANOVA and DOE analyses were performed using Minitab 20.3 software. Using the determined optimal parameters (Lh = 0.10 mm and Id = 100%), impact strength values were obtained that were 210.87% higher than the impact strength values obtained from testing PETG samples. Considering the impact strength results obtained for the samples manufactured from rPETG and the fact that rPETG filament is 11% cheaper per kilogram than PETG filament, it can be concluded that the use of rPETG filament is a viable solution for the additive manufacturing of parts by thermoplastic extrusion.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473910/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal and Mechanical Performance of Maleic Anhidride/Benzoyl Peroxide-Modified PLA/PCL Biocomposites. 马来酸酐/过氧化苯甲酰改性PLA/PCL生物复合材料的热力学性能。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-19 DOI: 10.3390/polym17182540

Aritz Unamuno Garay, Alexandra Llidó Barragán, Santiago Ferrandiz-Bou, Maria Dolores Samper

{"title":"Thermal and Mechanical Performance of Maleic Anhidride/Benzoyl Peroxide-Modified PLA/PCL Biocomposites.","authors":"Aritz Unamuno Garay, Alexandra Llidó Barragán, Santiago Ferrandiz-Bou, Maria Dolores Samper","doi":"10.3390/polym17182540","DOIUrl":"10.3390/polym17182540","url":null,"abstract":"This study investigated PLA/PCL blends modified with maleic anhydride (MA) via radical grafting using benzoyl peroxide (BPO) as an initiator. Different formulations with 5 and 10 wt.% of PLA-g-MA (containing 1, 3, and 5 wt.% MA) were prepared to evaluate their compatibilizing effect. Samples were characterized thermally, mechanically, and morphologically using DSC, TGA, FTIR, goniometry, SEM, and tensile, impact, and hardness tests. The results show that adding PCL significantly improves the ductility of PLA, though it reduces tensile strength and hardness. Grafting with MA partially improves phase compatibility, as seen by increased elongation at break and impact resistance, especially at intermediate MA concentrations (1-3%). However, higher MA contents lead to greater variability in thermal and mechanical results, likely due to heterogeneous phase dispersion. FTIR analysis detected residual BPO in some formulations, though below 0.1 phr. TGA indicated a slight improvement in thermal stability at 5 wt.% MA. Overall, the findings suggest that controlled use of MA as a compatibilizer enhances the balance of mechanical and thermal properties in PLA/PCL systems.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473204/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Characterization of Durable Glass Fibre (GF)-Reinforced PLA and PEEK Biomaterials. 耐用玻璃纤维（GF）增强PLA和PEEK生物材料的设计和特性。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-19 DOI: 10.3390/polym17182536

Asit Kumar Gain, Liangchi Zhang

{"title":"Design and Characterization of Durable Glass Fibre (GF)-Reinforced PLA and PEEK Biomaterials.","authors":"Asit Kumar Gain, Liangchi Zhang","doi":"10.3390/polym17182536","DOIUrl":"10.3390/polym17182536","url":null,"abstract":"Poly(lactic acid) (PLA) and poly(ether-ether ketone) (PEEK) are widely recognized for their biocompatibility and processability in orthopaedic applications. However, PLA suffers from brittleness and limited thermal and mechanical stability, while PEEK, despite its better strength, does not fully replicate the mechanical and tribological performance of natural bone. This study explores the enhancement of structural and tribological properties in PLA- and PEEK-based composites reinforced with short glass fibres (S-GF) via additive manufacturing. Microstructural analysis confirms uniform GF dispersion within both polymer matrices, with no evidence of agglomeration, fibre pull-out, or interfacial debonding, suggesting strong fibre-matrix adhesion. The incorporation of GF significantly improved mechanical performance: microhardness increased by 38.3% in PLA and 36.3% in PEEK composites, while tensile strength increased by 25.1% and 13.4%, respectively, compared to plain polymers. These enhancements are attributed to effective stress transfer enabled by uniform fibre distribution and strong interfacial bonding. Tribological tests further demonstrate enhanced wear resistance, reduce damage propagation, and improved surface integrity under micro-scratching. These findings highlight the potential of GF-reinforced PLA and PEEK composites as high-performance materials for load-bearing biomedical applications, offering a balanced combination of mechanical strength and wear resistance aligned with the functional requirements of bioimplants.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473161/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effect of Voltage Stabilizers on the Electrical Resistance Properties of EPDM Bulk for Cable Accessories. 电压稳定剂对电缆附件用三元乙丙橡胶体电阻性能的影响。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-18 DOI: 10.3390/polym17182523

Zhongyuan Li, Zhen Zhang, Chang Liu, Chenyang Ma, Xueting Wang

{"title":"The Effect of Voltage Stabilizers on the Electrical Resistance Properties of EPDM Bulk for Cable Accessories.","authors":"Zhongyuan Li, Zhen Zhang, Chang Liu, Chenyang Ma, Xueting Wang","doi":"10.3390/polym17182523","DOIUrl":"10.3390/polym17182523","url":null,"abstract":"As a critical component in high-voltage cable accessories, ethylene-propylene-diene monomer (EPDM) reinforced insulation faces severe issues of surface discharge and bulk breakdown at the insulation interface. To enhance the electrical resistance of EPDM bulk and insulation interfaces, the 4-allyloxy-2-hydroxybenzophenone was employed as a voltage stabilizer to modify EPDM. A systematic study was conducted on the influence of the voltage stabilizer on the DC breakdown strength of EPDM, the anti-migration properties of the voltage stabilizer, and its effect on the surface breakdown voltage of EPDM. Additionally, pressure and surface breakdown test setups were designed. The results indicate that the DC breakdown strength of EPDM decreases with increasing external pressure, and this decline is more pronounced in EPDM modified with the voltage stabilizer. Surface breakdown experiments demonstrate that the voltage stabilizer has a positive effect on improving the surface breakdown voltage of EPDM, with a more significant enhancement observed at the EPDM/XLPE bilayer dielectric interface. Surface potential tests reveal that the grafted voltage stabilizer introduces numerous shallow traps, inhibiting surface charge accumulation and thereby increasing the surface breakdown voltage.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473173/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structure and Properties of Sprayed Polyurethane Bio-Based Foams Produced Under Varying Fabrication Parameters. 不同工艺条件下喷涂聚氨酯生物基泡沫的结构与性能研究。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-18 DOI: 10.3390/polym17182522

Grzegorz Węgrzyk, Dominik Grzęda, Milena Leszczyńska, Laima Vēvere, Uģis Cābulis, Joanna Ryszkowska

{"title":"Structure and Properties of Sprayed Polyurethane Bio-Based Foams Produced Under Varying Fabrication Parameters.","authors":"Grzegorz Węgrzyk, Dominik Grzęda, Milena Leszczyńska, Laima Vēvere, Uģis Cābulis, Joanna Ryszkowska","doi":"10.3390/polym17182522","DOIUrl":"10.3390/polym17182522","url":null,"abstract":"The influence of both mixing pressure and substrate temperature on the structure and properties of spray polyurethane foams produced with a high content (80%) of tall oil-based polyol was investigated. The use of a renewable feedstock such as tall oil polyol aligns with the principles of sustainable development by reducing the carbon footprint and minimizing the environmental impact of the production process. The research focused on identifying the relationships between process parameters and the resulting materials' thermal insulation properties, physico-mechanical performance, thermal behavior, cellular structure, and chemical composition. The results demonstrated that increasing the mixing pressure (from 12.5 to 17.5 MPa) and substrate temperature (from 40 to 55 °C) led to a reduction in average pore diameter, an increase in closed-cell content up to 94.5% and improved structural homogeneity. The thermal conductivity coefficient (λ) ranged from 18.55 to 22.30 mW·m-1·K-1 while apparent density varied between 44.0 and 45.5 kg·m-3. Higher mixing pressure positively affected compressive strength, whereas elevated substrate temperature reduced this parameter. Brittleness, water uptake, and dimensional stability remained at favorable levels and showed no significant correlation with processing conditions. These findings confirm the high quality of the materials and highlight their potential as sustainable, environmentally friendly insulation foams.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473794/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Repeated Thermomechanical Recycling of Polypropylene-Organosheets to Injection-Moulded Glass-Fibre-Reinforced Composites. 聚丙烯-有机薄片的热机械循环制备注射成型玻璃纤维增强复合材料。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-18 DOI: 10.3390/polym17182528

Barbara Liedl, Thomas Höftberger, Gernot Zitzenbacher, Christoph Burgstaller

{"title":"Repeated Thermomechanical Recycling of Polypropylene-Organosheets to Injection-Moulded Glass-Fibre-Reinforced Composites.","authors":"Barbara Liedl, Thomas Höftberger, Gernot Zitzenbacher, Christoph Burgstaller","doi":"10.3390/polym17182528","DOIUrl":"10.3390/polym17182528","url":null,"abstract":"Continuous-fibre-reinforced thermoplastics are attractive materials for industries to cut down on weight in structural components. Recycling these parts or trims generated during production is difficult due to the reduced properties in materials intended for high-performance applications. Our study investigates the recyclability of short-fibre-reinforced compounds made from shredded organosheets. The fibre share was varied by the addition of virgin polypropylene, and three recycling rounds via a reduced injection-moulding process and a full thermomechanical recycling process including a compounding step were compared. Organosheet cuttings were found to be able to be applied as a short-glass-fibre source for the production of composites with varying fibre shares. Up to 14,000 MPa of elastic modulus and 80 MPa of tensile strength could be achieved at a fibre content of 45 vol%. Fibre length was reduced with progressive processing, less so for lower fibre shares, and in the reduced process without the shear and stress of the compounding step. Fibres from organosheets might be present in bundles and disperse in the matrix with progressive processing, which is particularly the case without compounding processes and can also influence the mechanical properties.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473630/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Drawing-Induced Crimp Formation and Wettability of Four-Lobed Side-by-Side PBT/PET Bicomponent Fibers. 四叶并列PBT/PET双组分纤维的拉伸诱导卷曲形成和润湿性。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-18 DOI: 10.3390/polym17182529

Xinkang Xu, Pei Feng, Zexu Hu, Jiazheng Wang, Qianchun Xu, Chongchang Yang

引用次数: 0

Multifunctional Application of Electrospun Fiber. 静电纺纤维的多功能应用。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-18 DOI: 10.3390/polym17182519

Rui Zhao

引用次数: 0

Effect of Nano-SiC Loading on Surface Discharge Performance of Polyimide at High-Frequency Electric Stress. 纳米sic负载对聚酰亚胺高频电应力下表面放电性能的影响。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-18 DOI: 10.3390/polym17182526

Ruoqing Hong, Qingmin Li, Huan Li, Qingming Xin

{"title":"Effect of Nano-SiC Loading on Surface Discharge Performance of Polyimide at High-Frequency Electric Stress.","authors":"Ruoqing Hong, Qingmin Li, Huan Li, Qingming Xin","doi":"10.3390/polym17182526","DOIUrl":"10.3390/polym17182526","url":null,"abstract":"This study targets insulation challenges in high-frequency power transformers (HFPTs), which are an integral part of the high-voltage, high-capacity isolated DC/DC converter under development for offshore renewable energy systems. We propose a nano-silicon carbide (SiC)-doped polyimide (PI) winding insulation strategy to enhance discharge resistance and thermal stability under high-frequency electric stress. Experimental results show that 10 wt% SiC doping significantly improves insulation performance, extending failure time from 17 to 50 min and reducing maximum discharge amplitude by 76%, owing to enhanced charge trapping and interfacial polarization suppression. Surface and volume resistivity measurements further confirmed the improvement; at 120 °C, the 10 wt% SiC composite maintained high surface resistivity 3.30 × 1014 Ω and volume resistivity 1.41 × 1015 Ω·cm, significantly outperforming pure PI. In contrast, 20 wt% SiC, though still resistive, showed reduced stability due to agglomeration and interfacial defects, with a surface resistivity of 2.07 × 1014 Ω and degraded dielectric performance. Dielectric analysis revealed that 10 wt% SiC suppressed dielectric constant and loss across the frequency range, while 20 wt% SiC exhibited increased values at high frequency. These results highlight 10 wt% SiC as an optimal formulation for HFPT winding insulation.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473874/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Nano Ferrochrome Slag-Infused Polymer Matrix on Mechanical Properties of Bidirectional Carbon Fiber-Reinforced Polymer Composite. 纳米铬铁熔渣注入聚合物基体对双向碳纤维增强聚合物复合材料力学性能的影响。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-18 DOI: 10.3390/polym17182527

Sultan Saif Al Mamari, Sabariah Julai, Mohd Faizul Mohd Sabri, Lenin Anselm Wilson Annamal, S M Shahabaz

{"title":"Effect of Nano Ferrochrome Slag-Infused Polymer Matrix on Mechanical Properties of Bidirectional Carbon Fiber-Reinforced Polymer Composite.","authors":"Sultan Saif Al Mamari, Sabariah Julai, Mohd Faizul Mohd Sabri, Lenin Anselm Wilson Annamal, S M Shahabaz","doi":"10.3390/polym17182527","DOIUrl":"10.3390/polym17182527","url":null,"abstract":"Polymeric nanocomposites have been extensively investigated due to their potential for enhancing the mechanical and tribological properties of polymer composites. In this study, the mechanical performance of carbon fiber-reinforced epoxy composites modified with nano-sized ferrochrome slag particles, an industrial by-product from stainless steel manufacturing, was evaluated. Composite laminates were fabricated using a vacuum-assisted hand lay-up process, with consistent carbon fiber reinforcement and uniformly dispersed nanofillers in the epoxy matrix. Mechanical properties such as tensile, flexural, impact, and Shore D hardness were evaluated as per ASTM and ISO standards. At 2 wt.% nanofiller loading, enhanced tensile strength and hardness by 33.02% and 8.92%, respectively, were achieved, while flexural strength and impact strength increased by 3.70% and 3.62% at 1 wt.% compared to the neat composite. Higher filler contents (>3 wt.%) resulted in reduced performance due to particle agglomeration and microstructural inhomogeneity. A scanning electron microscope was used to determine the uniform dispersion and agglomeration of nanofillers. The results demonstrated the potential of ferrochrome slag as a sustainable and cost-effective nanofiller for advanced composite applications.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473442/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0