Macromolecular Symposia最新文献_第5页

Co-Agent Assisted Peroxide Vulcanization of Halogen-Free Flame Retardant EPDM Compounds for Cable Sheathing 电缆护套用无卤阻燃三元乙丙橡胶的助剂辅助过氧化物硫化

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70074

Gürcan Gül, Cem Gözlü, Şehriban Öncel, Bağdagül Karaağaç

{"title":"Co-Agent Assisted Peroxide Vulcanization of Halogen-Free Flame Retardant EPDM Compounds for Cable Sheathing","authors":"Gürcan Gül, Cem Gözlü, Şehriban Öncel, Bağdagül Karaağaç","doi":"10.1002/masy.70074","DOIUrl":"https://doi.org/10.1002/masy.70074","url":null,"abstract":"<p>Thanks to advancements in technology and industry, expectations from polymer compounds are rising day by day. During a fire, flame retardancy and self-extinguishing properties are expected from polymer compounds in various industrial applications. Even though halogen-containing polymers are flame resistant, they release toxic and corrosive gases when burned, which limits their use. For this reason, a number of studies on halogen-free flame retardant (HFFR) compounds have been performed to improve material performance. Ethylene propylene diene rubber (EPDM) is widely used as a cable insulation material due to its superior dielectric properties and weathering resistance. However, EPDM is highly flammable when used alone. This issue can be overcome by incorporating various flame-retardant additives. In this study, the effects of two types of peroxides, four types of co-agents, and intumescent flame retardants (IFRs) on the rheological, physical, mechanical, thermal aging, and flammability properties of EPDM-based rubber formulations were investigated. Dicumyl peroxide (DCP) and di(tert-butyl peroxyisopropyl) benzene (BIBP) were selected as the peroxides. Triallyl isocyanurate (TAIC), high vinyl 1,2-polybutadiene (HVPBD), trimethylol propion trimethacrylate (TMPTMA), and zinc dimethacrylate (ZDMA) were used as co-agents. Additionally, an IFR system consisting of ammonium polyphosphate (APP), pentaerythritol (PER), and expanded graphite (EG) was used in the 2 phr co-agent-containing compounds. The IFRs provided a good level of flame retardancy, along with mechanical properties comparable to those of the peroxide-cured EPDM compounds. In conclusion, BIBP and ZDMA were found to be the most effective curing system for the EPDM-based HFFR compounds prepared in this study.</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.70074","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144910296","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

Malaysian Rubber Board Initiatives Toward EUDR Compliance 马来西亚橡胶板向EUDR合规的倡议

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70076

Noorliana Mohd Zan, Zameri Mohamed, Shabinah Filza Mohd Sharib, Muhammad Fadzli Ali, Shima Nazri

{"title":"Malaysian Rubber Board Initiatives Toward EUDR Compliance","authors":"Noorliana Mohd Zan, Zameri Mohamed, Shabinah Filza Mohd Sharib, Muhammad Fadzli Ali, Shima Nazri","doi":"10.1002/masy.70076","DOIUrl":"https://doi.org/10.1002/masy.70076","url":null,"abstract":"<div>\u0000 \u0000 <p>The EU Regulation on Deforestation-Free Products (EUDR), effective from June 29, 2023, aims to ensure that imported goods into the European Union (EU) are not linked to deforestation or forest degradation. The regulation, which replaces the EU Timber Regulation (EUTR), sets a cut-off date of December 31, 2020, and emphasizes due diligence, including tracking the geographical coordinates of production sites. In response, the Malaysian Rubber Board (MRB) developed the Malaysian Sustainable Natural Rubber (MSNR) framework, aligned with the EUDR. Governed under the MRB Act 1996 (Act 551), MSNR focuses on five principles: no deforestation for new rubber cultivation, compliance with national land code, environmental sustainability, social compliance, and supply chain traceability. MSNR incorporates the same deforestation cut-off date as EUDR and requires recording the geographic coordinates of all rubber plantations in Malaysia, regardless of size, ensuring broader traceability. The EUDR's country benchmarking system will assess Malaysia's deforestation risk based on environmental and economic sustainability. As Malaysia's primary rubber export to the EU is natural rubber gloves, which are largely made from raw materials sourced from Thailand, the country's risk status will be influenced by Thailand's deforestation benchmarks. This highlights the complexity of Malaysia's rubber industry and its commitment to sustainable practices.</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":"144910298","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

Macromol. Symp. 414-4 絮凝。计算机协会414 - 4

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70103

引用次数: 0

Investigation of Torsional Behavior of No-Backlash Flexible Couplings 无间隙柔性联轴器扭转性能研究

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70083

Ergün Ümitcan Güvenir, Hatice Kaplan Can

{"title":"Investigation of Torsional Behavior of No-Backlash Flexible Couplings","authors":"Ergün Ümitcan Güvenir, Hatice Kaplan Can","doi":"10.1002/masy.70083","DOIUrl":"https://doi.org/10.1002/masy.70083","url":null,"abstract":"<div>\u0000 \u0000 <p>Couplings are machine elements used in power transmission. With changing needs, the performance requirements of couplings have also increased. Additional performance requirements such as the ability to transfer the transmitted power without backlash, to tolerate misalignment to a certain extent and to dampen the vibration caused by the power generator have emerged. In order to meet these requirements, elastomer-based materials and metal materials are used together to meet these requirements. Within the scope of the study, the behavior of different couplings that can provide these properties against the torsional force generated during power transmission is investigated. Within the scope of the study, the mechanical behaviors of the couplings were examined by applying torsional loads corresponding to the requirements of the end-user in a simulated analysis environment. Under these conditions, their compliance with the specified backlash-free performance criteria was evaluated. The stress points on the coupling in response to the torsion and the effect of the geometries of the couplings with different geometric structures on the stresses were analyzed. A model was developed to analyze ideal coupling formation based on geometries. This study identified optimal coupling components that ensure flexibility and backlash-free transmission. Within the scope of this study, three different geometries of flexible couplings were analysed by FEA analysis method under defined conditions and it was seen that the 4-tooth model as backlash-free and flexible provided the desired conditions better than the other two models.</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":"144910009","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 the Effects of Peroxide Type and Coagent on the Curing and Mechanical Properties of Fluoro Vinyl Methyl Silicone 过氧化物类型及助剂对氟乙烯基甲基硅树脂固化及力学性能影响的研究

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70089

Davut Aksüt, Erkan Köse, Murat Şen

{"title":"Investigation of the Effects of Peroxide Type and Coagent on the Curing and Mechanical Properties of Fluoro Vinyl Methyl Silicone","authors":"Davut Aksüt, Erkan Köse, Murat Şen","doi":"10.1002/masy.70089","DOIUrl":"https://doi.org/10.1002/masy.70089","url":null,"abstract":"<div>\u0000 \u0000 <p>This study aims to investigate the effects of different peroxides and the triallyl isocyanurate (TAIC) as coagent on the curing, mechanical, and damping properties of fluoro vinyl methyl silicon rubber (FVMQ) elastomers. Rheological analysis reveals that dicumyl peroxide (DCP) provides faster curing rates, with a 50% higher Curing Rate Index (CRI) and 36% greater delta torque than 2,5-dimethyl-2,5-di(tertiary-butyl peroxy) hexane (DBPH), indicating improved crosslink density. Mechanical testing confirms superior tensile strength and stiffness in DCP-cured elastomers but at the expense of reduced elongation at break. TAIC further enhances crosslink density, increasing the elastic modulus by 50% and improving shock absorption properties. However, DBPH-cured systems exhibit superior damping behavior, characterized by higher relative hysteresis loss (tan <i>δ</i>), making them suitable for vibration-absorption applications. Di(2,4-dichlorobenzoyl)peroxide (DCLBP) systems failed to cure adequately, likely due to catalyst poisoning. These findings highlight the critical role of peroxide type and coagent in determining the properties of FVMQ elastomers for specific industrial applications, balancing stiffness, flexibility, and damping performance.</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":"144910003","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

Performance Analysis of Supercapacitor for Power Management in Smart Sensors 用于智能传感器电源管理的超级电容器性能分析

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70100

Neha Taneja, Pallavi Gupta, Patrizia Bocchetta, Meenal Gupta

{"title":"Performance Analysis of Supercapacitor for Power Management in Smart Sensors","authors":"Neha Taneja, Pallavi Gupta, Patrizia Bocchetta, Meenal Gupta","doi":"10.1002/masy.70100","DOIUrl":"https://doi.org/10.1002/masy.70100","url":null,"abstract":"<div>\u0000 \u0000 <p>This paper discusses the study of supercapacitors (SCs) with various smart sensors such as wireless biosensors and wearable sensors. To bridge conventional batteries and traditional capacitors, recent research into SCs has focused on improving their performance based on energy and power density. Numerous advances in materials, device architectures, and manufacturing processes for supercapacitor devices have been studied. Therefore, the recent progress on carbon material (as electrodes) and different electrolytes have also been discussed in the paper. The main focus is to elucidate the various materials based on carbon allotrope that enhance the specific capacitance and lead to improved energy density of SCs, which will mainly support the wireless sensors. Different characterization techniques for the SCs have been explored, such as galvanostatic charge–discharge and cyclic voltammetry, along with its self-discharge and charge-redistribution process. This paper also explains the recent progress of SC-operated smart sensors and the advantages and disadvantages of supercapacitor-based sensors. In the last section, challenges faced by supercapacitor-based wireless sensors have also been discussed.</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":"144910291","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

Dielectric and Photocatalytic Studies on Bi4Ti3O12 Ceramic Synthesized by Chemical Wet Route 化学湿法合成Bi4Ti3O12陶瓷的介电和光催化研究

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70088

Anup Kumar, Subash Chandra Gupta, Biswajeet Jena, Manish Kumar Verma, Harish Verma, Dhanesh Tiwary, N. B. Singh, Kamdeo Mandal

引用次数: 0

Preface: 2nd International Conference on Energy Materials and Devices (ICEMD-2024) 第二届国际能源材料与器件会议（ICEMD-2024）

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70107

引用次数: 0

Liquid 1,2-Epoxidized Polybutadiene Modification With FKM Rubber Application 液体1,2-环氧化聚丁二烯改性及其在FKM橡胶中的应用

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70098

Hiroki Hashimoto, Hokuto Ohura, Yuichi Tateishi

引用次数: 0

Reducing Marching Cure in Chloroprene Rubber Using Anti-Reversion Agents 使用防逆转剂减少氯丁橡胶的行进固化

Macromolecular Symposia Pub Date : 2025-08-28 DOI: 10.1002/masy.70073

Gizem Uzan Kar, Tuba Ünügül, Bağdagül Karaağaç

{"title":"Reducing Marching Cure in Chloroprene Rubber Using Anti-Reversion Agents","authors":"Gizem Uzan Kar, Tuba Ünügül, Bağdagül Karaağaç","doi":"10.1002/masy.70073","DOIUrl":"https://doi.org/10.1002/masy.70073","url":null,"abstract":"<p>Vulcanization is a process in which a rubber compound is irreversibly transformed into an elastic structure through chemical crosslinking agents under heat and pressure. This reaction is typically monitored using a moving die rheometer. Depending on the type of rubber, vulcanization temperature, and reaction duration, the vulcanization process can exhibit different curing behaviors, including plateau, reversion, or marching cure. In a marching cure, the torque value continuously increases over time, and this does not allow the reaction to reach an equilibrium. This prolonged curing time can limit industrial feasibility, making it necessary to optimize the vulcanization conditions for efficient processing. In this study, 1,3-bis(citraconimidomethyl)benzene (CIMB) and N-N’-m-phenylenedimaleimide (HVA-2), which are commonly used as anti-reversion agents in natural rubber (NR), were evaluated in terms of their ability to mitigate marching cure in chloroprene rubber (CR). Cure characteristics and marching modulus intensity (MMI) of the compounds prepared with various amounts of CIMB and HVA-2 were analyzed at elevated temperatures. The physical and mechanical properties were also studied before and after thermal aging of the vulcanizates. Both additives were found to be successfully used for mitigating marching cure in CR-based rubber compounds with a remarkable improvement in mechanical strength.</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.70073","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144910295","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