Journal of Applied Polymer Science最新文献_第9页

Preparation and Performance of High Bio-Based and Abrasion-Resistant Tread Rubber Based on Itaconate Rubber 以衣康酸酯橡胶为基材的高生物基耐磨胎面橡胶的制备及性能研究

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-09 DOI: 10.1002/app.56977

Xiaopeng An, Chaoying Sun, Junbiao Peng, Shanjun Hu, Hui Yang, Haijun Ji, Runguo Wang

{"title":"Preparation and Performance of High Bio-Based and Abrasion-Resistant Tread Rubber Based on Itaconate Rubber","authors":"Xiaopeng An, Chaoying Sun, Junbiao Peng, Shanjun Hu, Hui Yang, Haijun Ji, Runguo Wang","doi":"10.1002/app.56977","DOIUrl":"https://doi.org/10.1002/app.56977","url":null,"abstract":"<div>\u0000 \u0000 <p>The itaconate rubber, as a novel bio-based rubber, holds significance for the sustainable development of synthetic rubber. Guided by the development of tread materials with high bio-based content and high abrasion resistance, a study was conducted on the formulation of composites based on poly (dibutyl itaconate-co-butadiene) (PDBIB). In this paper, based on bio-based itaconate rubber, bio-based silica and lignin/zinc oxide (lignin/ZnO) were used to obtain rubber composites with a bio-based content of 72%. The tensile strength of itaconate rubber composite reinforced by bio-based silica can reach 18 MPa; lignin/ZnO has a good effect on the aging performance of rubber composites, which results the aging factor being increased from 0.49 to 0.62. In order to further improve its abrasion resistance as a tire, we introduced carbon nanotubes to increase its abrasion resistance by 7%, and analyzed the mechanism for the improvement of its abrasion resistance. In summary, this research provides a comprehensive analysis into the use of itaconate rubber in tread application, resulting in a high bio-based and abrasion-resistant tread rubber composite. This work offers strategic insights for the development of bio-based green tires for New Energy Vehicles.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 23","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143914599","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 Flame Retardancy of Carbon Nanotubes Reinforced Polyelectrolyte Multilayered Nanocomposites 碳纳米管增强聚电解质多层纳米复合材料的高阻燃性能

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-07 DOI: 10.1002/app.56967

Inyoung Lee, Seojin Kim, Jae-Oh Shim, Jung Sang Cho, Chungyeon Cho

{"title":"High Flame Retardancy of Carbon Nanotubes Reinforced Polyelectrolyte Multilayered Nanocomposites","authors":"Inyoung Lee, Seojin Kim, Jae-Oh Shim, Jung Sang Cho, Chungyeon Cho","doi":"10.1002/app.56967","DOIUrl":"https://doi.org/10.1002/app.56967","url":null,"abstract":"<div>\u0000 \u0000 <p>In pursuit of multifunctional flame-retardant coatings, a layer-by-layer (LbL) assembly was used to create hybrid nanocoatings by alternating the deposition of positively charged chitosan (CH) and negatively charged sodium lignosulfonate (Lg). Carbon nanotubes (CNT), dispersed in an Lg solution, were incorporated as robust reinforcements in polymer nanocomposites. Their high aspect ratio and dense network within the CH/CNT-Lg layers resulted in coatings that were notably thicker and heavier compared to those constructed without CNT. In horizontal flame tests, the presence of CNT led to superior fire resistance. Cone calorimetry further demonstrated that incorporating CNT into a single coating completely suppressed the second peak of heat release for polyurethane foam (PUF). Additionally, total smoke release, total smoke production, maximum average rate of heat emission, and effective heat of combustion were reduced by 68.9%, 72.7%, 47.7%, and 57.3%, respectively, compared to uncoated PUF. These improvements in flame retardancy are attributed to the enhanced thermal stability and high char yields provided by CNT. Overall, given the ease of applying LbL assembly, this strategy offers a promising halogen-free approach for improving fire safety in both natural and synthetic fibers.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 22","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892928","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

Synthesis and Characterization of Sulfonated Co-Polyimides With Enhanced Flexibility, Thermal and Methanol Stability for Potential Fuel Cell Applications 具有增强柔韧性、热稳定性和甲醇稳定性的磺化共聚酰亚胺的合成和表征，用于潜在的燃料电池应用

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-07 DOI: 10.1002/app.56950

Tuba Shaukat, Aalia Manzoor, Sadaf Ikram, Tehmeena Maryum Butt, Humaira Masood Siddiqi, Naveed Kausar Janjua

引用次数: 0

Improving Damping Performance of Thermoplastic Composite Materials Through SMC-TPU Hybridization SMC-TPU杂化改善热塑性复合材料阻尼性能

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-07 DOI: 10.1002/app.56938

Carina Emminger, Andreas Kapshammer, Janos Birtha, Umut Cakmak, Jörg Fischer, Zoltan Major

{"title":"Improving Damping Performance of Thermoplastic Composite Materials Through SMC-TPU Hybridization","authors":"Carina Emminger, Andreas Kapshammer, Janos Birtha, Umut Cakmak, Jörg Fischer, Zoltan Major","doi":"10.1002/app.56938","DOIUrl":"https://doi.org/10.1002/app.56938","url":null,"abstract":"<p>This study investigates the mechanical and dynamic thermomechanical properties of thermoplastic sheet molding compounds (TP-SMC) combined with thermoplastic polyurethane (TPU) to enhance damping while maintaining structural integrity. The methodology uses SMC, a residual material from UD tape processing, to further enhance sustainability. By combining SMC with TPU, a hybrid material is created that merges the high stiffness of the composite with improved damping capabilities. The research explores the effect of varying TPU content (0%, 20%, 40%, and 60%) on composite properties. Results show that TPU incorporation significantly improves damping properties, with diminishing improvements observed beyond 40% TPU content. The glass transition temperature of the TPU defines the lower application limit of the composites, while lofting behavior, also influenced by the TPU content, defines the upper application limit. These SMC-TPU composites have potential in automotive and aerospace applications requiring vibration damping and robust performance. Future research should focus on optimizing manufacturing processes and exploring other thermoplastic matrices.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 22","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/app.56938","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892929","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

Behavior of Polyamide Brackish Water Reverse Osmosis Membranes in Acidic NaOCl Environment 聚酰胺微咸水反渗透膜在酸性NaOCl环境中的行为

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-06 DOI: 10.1002/app.56940

Srija Madduri, Hemant S. Sodaye, A. K. Debnath, A. K. Adak, T. L. Prasad

{"title":"Behavior of Polyamide Brackish Water Reverse Osmosis Membranes in Acidic NaOCl Environment","authors":"Srija Madduri, Hemant S. Sodaye, A. K. Debnath, A. K. Adak, T. L. Prasad","doi":"10.1002/app.56940","DOIUrl":"https://doi.org/10.1002/app.56940","url":null,"abstract":"<p>The chlorine sensitivity of polyamide reverse osmosis (RO) membranes has been a persistent challenge, as chemical alterations compromise their structural integrity, reducing their effectiveness in desalination and water treatment applications. This study examines the structural changes and performance impacts of chlorination of BWRO membranes under acidic conditions (pH 4) using NaOCl at concentrations of 500–10,000 ppm for 1, 3, and 6 h. Characterization techniques such as SEM, AFM, ATR-FTIR, XPS, contact angle, and GIXRD were employed. The results showed a significant decrease in pure water flux (PWF) after exposure to acidic hypochlorous acid (HOCl), which was subsequently recovered after salt passage. Interestingly, a slight increase in salt rejection (% SR) was observed up to 5000 ppm for 3 h of treatment, followed by a decline at higher exposures. This behavior of abrupt drop and recovery in flux with a marginal increase in salt rejection is attributed to conformational changes in the membrane. GIXRD analysis revealed reduced crystallinity and wettability at low HOCl concentrations, while higher levels caused membrane embrittlement. This study provides key insights into the structural and transport changes in RO membranes during acidic chlorination, highlighting the need for optimized cleaning protocols to enhance membrane lifespan.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 22","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/app.56940","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892925","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

Innovative UV-Responsive Self-Healing Polyacrylate Coatings for Enhanced Durability in Functional Applications 创新的紫外线响应自修复聚丙烯酸酯涂料在功能性应用中增强耐用性

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-06 DOI: 10.1002/app.56962

Hong Yang, Yan Bao, Chao Liu, Sike Yu, Ruyue Guo, Wenbo Zhang, Ji Li

{"title":"Innovative UV-Responsive Self-Healing Polyacrylate Coatings for Enhanced Durability in Functional Applications","authors":"Hong Yang, Yan Bao, Chao Liu, Sike Yu, Ruyue Guo, Wenbo Zhang, Ji Li","doi":"10.1002/app.56962","DOIUrl":"https://doi.org/10.1002/app.56962","url":null,"abstract":"<div>\u0000 \u0000 <p>Polyacrylate was widely used in textiles, leather, and functional coatings due to its excellent film formation and flexibility. However, its durability was compromised by mechanical damage and poor water resistance. This study aimed to design a UV-induced self-healing polyacrylate coating (PXD) using vinyl-modified coumarin and acrylate monomers based on photoreversible covalent and hydrophobic interactions. The effect of the coumarin structure on the mechanical and self-healing properties was systematically examined. Results showed that increasing polymer chain flexibility, extending the distance between coumarin structures and the main chain, and raising the healing temperature enhanced self-healing efficiency. The PXD samples achieved over 84% healing efficiency after 8 h of 365 nm UV irradiation at 60°C, with scratches approximately 15 μm wide nearly fully healed within 2 h. Molecular dynamics simulations confirmed the influence of monomer structure on polymer flexibility, and the PXD self-healing mechanism was clarified. PXD-5 also exhibited improved hydrophobicity and water resistance, particularly under UV light, significantly enhancing leather durability. This development of UV-induced self-healing polyacrylate coatings represents a significant advancement in functional coating materials.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 22","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892926","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

Probing the Effect of Prepolymerization on the Structure and Properties of Phthalonitrile Resin/Basalt Fiber Composites 预聚合对邻苯二腈树脂/玄武岩纤维复合材料结构和性能影响的探讨

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-06 DOI: 10.1002/app.56976

Shuai Zhang, Ao Yang, Pan He, Yi Lu, Guangzhao Li, Jiajia Ye, Yumin Huang, Rui Han

{"title":"Probing the Effect of Prepolymerization on the Structure and Properties of Phthalonitrile Resin/Basalt Fiber Composites","authors":"Shuai Zhang, Ao Yang, Pan He, Yi Lu, Guangzhao Li, Jiajia Ye, Yumin Huang, Rui Han","doi":"10.1002/app.56976","DOIUrl":"https://doi.org/10.1002/app.56976","url":null,"abstract":"<div>\u0000 \u0000 <p>Prepolymerization is a common procedure in the practical application of high-performance composites based on thermosetting resins, but very few reports studied the effects of prepolymerization on the curing reactivity, the chemical structure, and the properties of the final composites. Therefore, in this work, a phthalonitrile resin with a benzoxazine moiety was selected for prepolymerization and for preparing composites with basalt fiber cloth. It was revealed that the molecular weight increased slightly after prepolymerization, consuming a small number of functional groups and releasing groups with catalytic activity. Consequently, the curing reactivity of the prepolymers increased and then decreased; the toughness and strength increased, but the thermal properties increased and then decreased after prepolymerization. All of the variations resulted from the combined function of generated active groups and decreased molecular mobility; that is, more active groups such as phenolic hydroxyls were released after prepolymerization, but the molecular weight was increased, and functional groups were consumed, which led to difficulty in the motion of the resin melt and the crosslinking reaction.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 23","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143914281","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

Colorimetric Dye-Loaded, Adhesive, and Stretchable Hydrogel Sensor: A Sensitive and Visible H2S Gas Sensing Platform 比色染料负载，粘合剂和可拉伸的水凝胶传感器：一个敏感和可见的H2S气体传感平台

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-05 DOI: 10.1002/app.56624

Leixin Liu, Shanshan Yuan, Chenxi Guan, Jian Zhou, Yi Yao, Qiliang Zhang, Fangli Gang

{"title":"Colorimetric Dye-Loaded, Adhesive, and Stretchable Hydrogel Sensor: A Sensitive and Visible H2S Gas Sensing Platform","authors":"Leixin Liu, Shanshan Yuan, Chenxi Guan, Jian Zhou, Yi Yao, Qiliang Zhang, Fangli Gang","doi":"10.1002/app.56624","DOIUrl":"https://doi.org/10.1002/app.56624","url":null,"abstract":"<div>\u0000 \u0000 <p>Hydrogen sulfide (H<sub>2</sub>S), as a toxic gas, is one of the occupational hazards to workers' health. Traditional H<sub>2</sub>S sensors often suffer from external circuits, measurement systems, liquid-phase reactions, or high detection limits. Herein, a colorimetric sensor for H<sub>2</sub>S detection was developed by incorporating colorimetric dye [lead acetate, Pb(OAc)<sub>2</sub>] into polyacrylamide (PAM)/polyvinyl alcohol (PVA) hydrogel. Benefitting from the interpenetrating polymer network, non-covalent interactions such as hydrogen bonds and dense internal structure, the hydrogel exhibited excellent adhesion to different substances (adhesion strength up to 14.11 kPa) and mechanical properties (tensile strength up to 116.92 kPa, elongation rate up to 576%). Furthermore, due to the liquid-phase reaction system and excellent [Pb(OAc)<sub>2</sub>] loading capacity provided by the hydrogel, the prepared sensors exhibited excellent sensing performance response time, sensitivity, and simplicity. The theoretical detection limit of the sensor was 0.69 ppm, and the minimum exposure time required for detection was 14 s. The colorimetric effect of the hydrogels was positively correlated with the addition of Pb(OAc)<sub>2</sub> and the extension of time. The results showed that the color change of PAM/PVA/Pb(OAc)<sub>2</sub> hydrogel can be visible to the naked eye even if the concentration of H<sub>2</sub>S is only 1 ppm. It is expected that this hands-free, arbitrarily adhesive, stretchable hydrogel colorimetric sensor strategy for visual detection of H<sub>2</sub>S will extend toxic gas alarm systems to a new level.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 18","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143741199","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 Role of Polytetrahydrofuran (PTHF) as Reactive Plasticizer on the Processing and Performance of Hydroxyl-Terminated Polybutadiene (HTPB)-Based Polyurethane Elastomers 聚四氢呋喃（PTHF）作为活性增塑剂对端羟基聚丁二烯（HTPB）基聚氨酯弹性体的加工和性能的影响

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-05 DOI: 10.1002/app.56966

Naveed Ahmad Tahir, Syazana Ahmad Zubir

{"title":"The Role of Polytetrahydrofuran (PTHF) as Reactive Plasticizer on the Processing and Performance of Hydroxyl-Terminated Polybutadiene (HTPB)-Based Polyurethane Elastomers","authors":"Naveed Ahmad Tahir, Syazana Ahmad Zubir","doi":"10.1002/app.56966","DOIUrl":"https://doi.org/10.1002/app.56966","url":null,"abstract":"<div>\u0000 \u0000 <p>Despite better processing and flexibility, conventional plasticizers, being unbound additives, tend to migrate, which adversely affects the structural integrity of the end product by modifying mechanical properties. This study aims to investigate the potential of polytetrahydrofuran (PTHF) as a reactive plasticizer to enhance the processing and performance of HTPB-based polyurethane elastomers (PUE), providing a balance between improved flexibility, desired mechanical properties, and also a remedial solution to overcome the plasticizer migration issue. Optimization of processing parameters and chemo-rheological cure kinetics was evaluated through chemo-rheological analysis at a wider temperature range of 50°C–80°C. Cure kinetics due to the polymerization reaction was also monitored by periodically observing the disappearance of the characteristic NCO peak using Fourier-transform infrared spectroscopy (FTIR). The impact of different molar ratios of PTHF/HTPB (<i>ξ</i>) on the performance of the synthesized PUE has also been evaluated. The polymerization temperature was set to 60°C, supported by minimal viscosity build-up and a lower activation energy of 30.4 kJ mol<sup>−1</sup>. The pot life increased by 86% when <i>ξ</i> was 0.20 as compared to the control sample and reduced by 47% for PUE at <i>ξ</i> = 0.10 when the curing temperature increased from 50°C to 80°C. With increasing <i>ξ</i>, the tensile strength increased to 2.73 MPa when <i>ξ</i> was 0.15 and then declined afterward, and elongation at break increased from 505% to 764%. The molar ratio (<i>ξ</i>) at 0.15 was optimized and presented excellent results in terms of higher pot life and a good balance of mechanical properties.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 22","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892899","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 Influence of Enclosed Isocyanate Dosage on the Reaction Rate, Mechanical Properties and Grinding Performance of Polyurethane Grinding Wheels 封闭异氰酸酯用量对聚氨酯砂轮反应速率、力学性能和磨削性能的影响

IF 2.7 3区化学

Journal of Applied Polymer Science Pub Date : 2025-03-04 DOI: 10.1002/app.56961

Shanxin Xiong, Kerui Zhang, Chenxu Wang, Guangheng Wang, Xiaoqin Wang, Longquan Xia, Guoxiang Xia, Chengjin Hua

{"title":"The Influence of Enclosed Isocyanate Dosage on the Reaction Rate, Mechanical Properties and Grinding Performance of Polyurethane Grinding Wheels","authors":"Shanxin Xiong, Kerui Zhang, Chenxu Wang, Guangheng Wang, Xiaoqin Wang, Longquan Xia, Guoxiang Xia, Chengjin Hua","doi":"10.1002/app.56961","DOIUrl":"https://doi.org/10.1002/app.56961","url":null,"abstract":"<div>\u0000 \u0000 <p>Polyurethane (PU) materials are known for their excellent elasticity and abrasion resistance, which makes them a good matrix for grinding materials. However, the fast reaction speed makes the production of large polishing wheels more difficult. In order to prolong the reaction time of polyurethanes, the reaction of phenol and polymethylene isocyanate (PAPI) was utilized in this paper to enclose the more reactive isocyanate (<span></span>NCO). The enclosed <span></span>NCO was then unsealed by heating, and PU materials containing differently enclosed <span></span>NCO were subsequently prepared. We used various molar ratios of <span></span>NCO and <span></span>OH to prepare the PU materials, where a portion of the <span></span>NCO content was provided by heating the enclosed <span></span>NCO. The morphology and properties of the materials were investigated by a series of structural characterizations scanning electron microscopy (SEM) and (Fourier transform infrared (FTIR) spectroscopy) and hardness tests. The mechanical properties of PU materials containing different enclosed <span></span>NCOs were investigated, in which 30% of the added closed <span></span>NCO had good foaming stability, with a pore size of 350 μm, a reaction time of 9 min, a Shore hardness C of up to 90, and a good economic efficiency. The PU polishing wheel we prepared has a one-time grinding removal rate of more than 90% on the surface of the copper sheet, while the thickness of the copper sheet was reduced by 0.0007 mm. The addition of sealers can well extend the reaction time of PU materials, which provides engineers with a good direction for further applications of PU materials.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 22","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892835","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