Macromolecular Symposia最新文献

Optimizing Rubber Vulcanizate Performance: Investigating the Impact of Mixing Time on Rheological and Cured Characteristics Through Advanced Characterization 优化橡胶硫化性能：通过高级表征研究混合时间对流变学和固化特性的影响

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70077

Ajay C., Rahul Das, Saikat Das Gupta, Rabindra Mukhopadhyay, Dipankar Chattopadhyay, Mahuya Das

{"title":"Optimizing Rubber Vulcanizate Performance: Investigating the Impact of Mixing Time on Rheological and Cured Characteristics Through Advanced Characterization","authors":"Ajay C., Rahul Das, Saikat Das Gupta, Rabindra Mukhopadhyay, Dipankar Chattopadhyay, Mahuya Das","doi":"10.1002/masy.70077","DOIUrl":"https://doi.org/10.1002/masy.70077","url":null,"abstract":"<div>\u0000 \u0000 <p>The mixing process plays a crucial role in determining rubber compounds' rheological and mechanical properties, directly influencing their performance and durability. This study explores the impact of varying mixing times on the properties of rubber compounds based on natural rubber (NR) and styrene-butadiene rubber (SBR). By employing advanced characterization techniques such as the rubber process analyzer (RPA) and dynamic mechanical analyzer (DMA), key parameters including viscoelastic behavior, processability, hardness, tensile strength, resilience, aging resistance, crosslink density, air permeability, fatigue resistance, and so forth were systematically evaluated. The study also investigates filler–filler interactions and microstructural characteristics to establish a fundamental understanding of how mixing time affects material performance. Also, the Maier and Goritz model was utilized to predict rubber–filler interactions under different mixing conditions. The analysis of chain mobility using DMA provided insights into the molecular dynamics governing viscoelastic properties. Results indicate a 5-min mixing duration optimizes processability and mechanical performance in NR and SBR compounds. These findings highlighted the critical role of precise mixing time control in optimizing the quality, consistency, and longevity of rubber products, presenting valuable insights for enhancing general-purpose rubber formulations in industrial applications through advanced characterization techniques.</p>\u0000 </div>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144910014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling Study of Tensile Strength of Filled and Strain-Crystallizing Elastomers 填充和应变结晶弹性体抗拉强度的建模研究

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70082

Lena Tarrach

引用次数: 0

Preparation and Characterization of an Ionomeric Self-Healing Poly(Epichlorohydrin) With Different Approaches 离子自愈聚环氧氯丙烷的制备与表征

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70079

Amina Haliouche, Davut Aksüt, Zühra Çınar Esin, Murat Şen

{"title":"Preparation and Characterization of an Ionomeric Self-Healing Poly(Epichlorohydrin) With Different Approaches","authors":"Amina Haliouche, Davut Aksüt, Zühra Çınar Esin, Murat Şen","doi":"10.1002/masy.70079","DOIUrl":"https://doi.org/10.1002/masy.70079","url":null,"abstract":"<div>\u0000 \u0000 <p>This study investigates the successful modification of epichlorohydrin-based rubbers by incorporating phenol sulfonate, butyl imidazole, and sodium azide via chemical modification. Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance (<sup>1</sup>H NMR and <sup>1</sup><sup>3</sup>C NMR) analyses were utilized to characterize the structural changes and chemical interactions induced by the additives. The objective was to enhance the polymer's mechanical and thermal properties while imparting self-healing capabilities. Post-modification, thermogravimetric analysis (TGA) confirmed significant improvements in thermal stability. Stress-strain analysis revealed increased tensile strength and elongation at break, demonstrating enhanced elasticity and resilience, with a 150% improvement in tensile strength and 80% elongation at break, indicating superior elasticity. Notably, the modified rubbers exhibited autonomous self-repair within 24 h after mechanical damage, attributed to dynamic bonds π − π interaction and hydrogen bonding networks. These advancements, supported by microscopic evaluations, highlight the potential of tailored epichlorohydrin-based rubbers for applications in durable coatings, aerospace seals, and adaptive industrial materials requiring resilience under extreme conditions.</p>\u0000 </div>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144910302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Different R Reactive Groups on Cross-Linking Properties of POSS/Tetra-Fluoroethylene Propylene Composites 不同R反应基团对POSS/四氟乙丙烯复合材料交联性能的影响

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70102

Lanqiong Zhang, Xi Zhang, Chenjun Zhang, Xiaodan Liu, Yiheng Li, Rui Yang, Xiaoqi Wang

{"title":"Effect of Different R Reactive Groups on Cross-Linking Properties of POSS/Tetra-Fluoroethylene Propylene Composites","authors":"Lanqiong Zhang, Xi Zhang, Chenjun Zhang, Xiaodan Liu, Yiheng Li, Rui Yang, Xiaoqi Wang","doi":"10.1002/masy.70102","DOIUrl":"https://doi.org/10.1002/masy.70102","url":null,"abstract":"<div>\u0000 \u0000 <p>The C─F bond in the structure of Tetra-fluoroethylene propylene (TFEP) determines its good high temperature resistance and chemical stability, which makes this rubber widely used in the petrochemical industry. Compared with other rubbers, TFEP has high molecular chain stability and is not easy to cross-link. So, it suffers from low cross-linking efficiency and poor mechanical properties. The development of suitable cross-linking systems is significant to improve the performance of TFEP. Polyhedral oligomeric silsesquioxane (POSS) is widely used in composites because of its good thermal stability and mechanical properties. POSS-like materials have been widely used as cross-linking agents in the preparation of polymers, but their applications in fluoroelastomers are relatively few. In this paper, the effects of two different reactive functional groups of the R groups of POSS materials on the cross-linking behavior of TFEP are analyzed. We first optimized the formulation by vulcanization and mechanical property tests. Then, the type and dosage of the main crosslinking agent were optimized by vulcanization characteristic test, mechanical property test, and other characterization methods. The structures of the composites were characterized by IR spectroscopy and scanning electron microscope (SEM). Their mechanical and thermal properties were measured by tensile experiment, thermogravimetric analysis (TGA), and Differential Scanning Calorimetry (DSC) Analysis.</p>\u0000 </div>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144910012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of Effect of Waste Onyx Stone Powder on Properties of Carbon Black/Ethylene Propylene Diene Monomer Composites 废玛瑙石粉对炭黑/乙丙二烯单体复合材料性能影响的研究

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70080

Suzan Ciftci, İlker Köprü, Salih Hakan Yetgin

{"title":"Investigation of Effect of Waste Onyx Stone Powder on Properties of Carbon Black/Ethylene Propylene Diene Monomer Composites","authors":"Suzan Ciftci, İlker Köprü, Salih Hakan Yetgin","doi":"10.1002/masy.70080","DOIUrl":"https://doi.org/10.1002/masy.70080","url":null,"abstract":"<p>Nowadays, studies are being carried out on recycling waste formed during cutting in the natural stone industry and using it as an additive in different sectors to create new products. This study aims to enhance the functionality of waste onyx powder (WOP) sourced from the Cappadocia region by incorporating it into ethylene propylene diene monomer (EPDM) rubber, thereby contributing to the recycling of waste materials and promoting their economic value. Waste onyx powders were added at 22, 50, and 95 phr. From curing properties, minimum torque, maximum torque, cure extent (CE), and cure rate index increased with the addition of WOP. The stress at 100% elongation (M100) and stress at 200% elongation (M200) increased by 58.6% and 46.3% with the addition of 95 phr WOP. At 22 phr of WOP, EPDM/WOP composites had the maximum TS, 14.3 MPa, which was approximately 20.1% greater than EPDM rubber. The elongation at break decreased by 9.5%, 17.4%, and 17.7% with the addition of 22, 50, and 95 phr WOP, respectively. The rebound resilience values of EPDM and EPDM/WOP composites were obtained between 62.2% and 50.91%. The addition of 95 phr WOP caused the tear strength to be reduced, whereas it improved the compression set of EPDM. This supports the improved reinforcing efficiency of waste onyx powder in EPDM rubber. The study demonstrates that waste onyx powder can serve as an affordable filler, enabling the production of cost-effective rubber products for applications such as car and door mats, window channels, and both clean and wastewater pipes.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/masy.70080","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144910015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Macromol. Symp. 414 絮凝。414年计算机协会。

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70106

引用次数: 0

Identification of Dynamic Mechanical Properties of Radiation-Modified Silicone Elastomers by Dynamic Mechanical Yerzley Oscillograph 用动态机械Yerzley示波仪识别辐照改性有机硅弹性体的动态力学性能

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70090

Zühra Çınar Esin, Murat Şen, İsmail Saltuk, Nuri Akgerman

{"title":"Identification of Dynamic Mechanical Properties of Radiation-Modified Silicone Elastomers by Dynamic Mechanical Yerzley Oscillograph","authors":"Zühra Çınar Esin, Murat Şen, İsmail Saltuk, Nuri Akgerman","doi":"10.1002/masy.70090","DOIUrl":"https://doi.org/10.1002/masy.70090","url":null,"abstract":"<div>\u0000 \u0000 <p>This study aims to investigate dynamic mechanical properties of platinum (Pt) catalyst cured vinyl-methyl-polysiloxane (VMQ) phenyl-vinyl-methyl-polysiloxane (PVMQ) elastomers at natural frequency and compare those properties for these two elastomer systems. It is also aimed to show the effect of radiation on dynamic mechanical properties of VMQ and PVMQ elastomers at natural frequency. First, Pt-VMQ and Pt-PVMQ elastomers’ curing conditions were determined using a moving die rheometer. Then, the cured silicone elastomers were irradiated with different doses. To show the effect of absorbed dose on the mechanical properties of both elastomer systems, stress–strain behaviors were examined using universal testing machine, and it was shown that ionizing radiation increases the tensile strength of both elastomer systems while it decreases elongation at the break value of both of them. The crosslink densities of Pt-VMQ and Pt-PVMQ elastomers were calculated to determine the effect of the absorbed dose on the network structure of elastomers. In order to determine the crosslink density of both VMQ and PVMQ elastomers, swelling degree and other relevant parameter were used, and it was shown the effect of ionizing radiation on both VMQ and PVMQ elastomers is an increase in crosslink density. To identify the effect of irradiation on the damping properties of Pt-VMQ and Pt-PVMQ elastomers at the natural frequency, dynamic mechanical properties were investigated using Dynamic Mechanical Yerzley Oscillograph (DMYO-5). As a result of this study, it has been shown that PVMQ elastomers’ dynamic mechanical properties at natural frequency are more stable against radiation than VMQ elastomers.</p>\u0000 </div>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144910181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical Study of Ptn (n = 2–7) Nanoclusters: A DFT Approach Ptn （n = 2-7）纳米簇的理论研究：DFT方法

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70092

Prabhat Ranjan, Preeti Nanda, Tanmoy Chakraborty

{"title":"Theoretical Study of Ptn (n = 2–7) Nanoclusters: A DFT Approach","authors":"Prabhat Ranjan, Preeti Nanda, Tanmoy Chakraborty","doi":"10.1002/masy.70092","DOIUrl":"https://doi.org/10.1002/masy.70092","url":null,"abstract":"<div>\u0000 \u0000 <p>Nanocluster is an important field of science and technology, which helps to investigate the advancement that subsists among the microscopic and macroscopic framework of materials. The study of transition metallic nanoclusters has drawn considerable attention recently. In the present work, density functional theory (DFT) paradigm is efficaciously applied to examine platinum Pt<i><sub>n</sub></i> (<i>n</i> = 2–7) nanoclusters. Highest occupied molecular orbital–lowest unoccupied molecular orbital (HOMO–LUMO) energy gap of Pt<i><sub>n</sub></i> nanoclusters fluctuate among 0.259–1.275 eV. The data reveals that Pt<sub>2</sub> cluster exhibits maximum ionization potential, HOMO–LUMO energy gap, molecular hardness, and electronegativity, whereas it has minimum softness and electrophilicity index. System Pt<sub>5</sub> displays a minimum value for HOMO–LUMO energy gap and molecular hardness. However, Pt<sub>5</sub> cluster exhibits a maximum value of softness and electrophilicity index. Cluster Pt<sub>7</sub> possesses a minimum value of ionization potential and electronegativity, whereas it displays a maximum value of electron affinity. System Pt<sub>6</sub> exhibits minimum electron affinity and maximum dipole moment. The smaller electrophilicity index of Pt<sub>2</sub> cluster indicates potential for the stable cluster. The linear association among HOMO–LUMO gap and CDFT-based parameters are examined. The HOMO–LUMO gap of the investigated platinum nanoclusters follows an even–odd alteration pattern.</p>\u0000 </div>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144910290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Molecular Interaction Study of Polymer-NiFe2O4 Nanofluids at Different Temperatures by Using Ultrasonic Waves of 2 and 5 MHz for Medical Applications 医用2 MHz和5 MHz超声合成聚合物- nife2o4纳米流体及其分子相互作用研究

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70086

Bashar Badamasi Lailaba, Krishna Kumar Pandey, Arun Upmanyu

{"title":"Synthesis and Molecular Interaction Study of Polymer-NiFe2O4 Nanofluids at Different Temperatures by Using Ultrasonic Waves of 2 and 5 MHz for Medical Applications","authors":"Bashar Badamasi Lailaba, Krishna Kumar Pandey, Arun Upmanyu","doi":"10.1002/masy.70086","DOIUrl":"https://doi.org/10.1002/masy.70086","url":null,"abstract":"<div>\u0000 \u0000 <p>In this study, the sol–gel synthesis technique was used to create the pure nickel ferrite (NiFe<sub>2</sub>O<sub>4</sub>) nanoparticles. Citric acid is utilized as a stabilizing agent to aid in the creation of nanoparticles and control the size and morphology of the nanoparticles. Nickel sulfate hexahydrate (Ni(SO<sub>4</sub>)⋅6H<sub>2</sub>O) and iron nitrate nonahydrate (Fe<sub>2</sub> (NO<sub>3</sub>)<sub>3</sub>⋅9H<sub>2</sub>O) are used as precursors. To improve the size and band gap of the resulting nanoparticle sample, ultraviolet (UV) characterization is performed. To create the homogenous solution known as PEG-NiFe<sub>2</sub>O<sub>4</sub> nanofluids of 2% concentration and 0.6 g of nanoparticle powder were disseminated into 30 mL of polyethylene glycol (PEG) polymer and agitated for at least 4 h at 70°C. To evaluate the ultrasonic velocity, density, and viscosity at various temperatures (303–333 K), the acquired sample was poured into the ultrasonic interferometer cylinder of ultrasonic wave frequencies 2 and 5 MHz in addition, utilizing practical parameters like ultrasonic velocity, density, and viscosity, the associated ultrasonic parameters like adiabatic compressibility, acoustic impedance, and ultrasonic attenuation were calculated. The obtained results have been discussed in detail.</p>\u0000 </div>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144910292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aging and Degradation Properties of Nanocellulose/Carboxylated Nitrile Butadiene Rubber (XNBR) Latex Films 纳米纤维素/羧化丁腈橡胶（XNBR）乳胶膜的老化与降解性能

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70078

Nuur Syuhada Dzulkafly, Norfatirah Muhamad Sarih, Azura A. Rashid

{"title":"Aging and Degradation Properties of Nanocellulose/Carboxylated Nitrile Butadiene Rubber (XNBR) Latex Films","authors":"Nuur Syuhada Dzulkafly, Norfatirah Muhamad Sarih, Azura A. Rashid","doi":"10.1002/masy.70078","DOIUrl":"https://doi.org/10.1002/masy.70078","url":null,"abstract":"<div>\u0000 \u0000 <p>Carboxylated nitrile butadiene rubber (XNBR) is widely used in glove manufacturing due to its exceptional properties. However, the limited biodegradability of XNBR gloves has raised environmental concerns, driving the need for sustainable material innovations. This study explores the potential of cellulose-based fillers to enhance the biodegradation process. Cellulose nanofibers (CNF) were extracted from oil palm empty fruit bunches (OPEFB) and incorporated as fillers into XNBR latex to evaluate their impact on biodegradation across various crosslinking systems. The latex films were prepared with sulfur crosslinking (XNBR-control) and without sulfur crosslinking, utilizing different formulations (CNF, CNF-ZnO, CNF-ZDEC, and CNF-sulfur). These films were subjected to aging tests and soil burial experiments to assess their performance. Tensile properties and crosslink density were measured to understand the effects of aging, while biodegradation was monitored at intervals of 2, 4, and 8 weeks during soil burial. Analytical techniques such as Fourier transform infrared (FTIR) spectroscopy, mass loss measurements, and surface morphology analysis were employed to characterize the degradation process. The results revealed that incorporating CNF significantly improved the biodegradation rate of XNBR latex films. Notably, films prepared without sulfur crosslinking degraded faster than those with sulfur crosslinking, highlighting the influence of crosslinking chemistry on biodegradability. This study demonstrates that integrating nanocellulose from agricultural waste like OPEFB into XNBR latex provides an effective pathway to enhance environmental sustainability in glove manufacturing.</p>\u0000 </div>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144910297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0