Rubber Chemistry and Technology最新文献_第2页

Bead Size and Rheological Properties of SEBS-Based Elastic Beads 基于 SEBS 的弹性珠的粒度和流变特性

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2024-06-03 DOI: 10.5254/rct-d-24-00011

Aubrey Dettman, Sandhiya Thiagarajan, Amanda S. Koh

{"title":"Bead Size and Rheological Properties of SEBS-Based Elastic Beads","authors":"Aubrey Dettman, Sandhiya Thiagarajan, Amanda S. Koh","doi":"10.5254/rct-d-24-00011","DOIUrl":"https://doi.org/10.5254/rct-d-24-00011","url":null,"abstract":"\u0000 Styrene-ethylene-butylene-styrene, (SEBS), is a thermoplastic elastomer that has applications in robotics and shock absorption. While SEBS as a bulk material as well as an additive to solid composites has been extensively studied, this work focuses on developing SEBS-based beads to enhance material, particularly fluid, elasticity; the first time this has been seen in literature. SEBS bead mixtures were developed by mixing SEBS elastomer, water, and surfactant (Triton X-100) at high temperature. Stability, rheology, and microscopy of SEBS bead mixtures were studied as a function of neat SEBS concentration in SEBS elastomer, SEBS elastomer concentration, and surfactant concentration. Resulting bead mixtures were classified as creamed, homogenous and stable, or aggregated bead mixtures based on the mixture's tendency to separate into layers and ability to disperse in excess water. Microscopic studies suggest that while bead mixtures exhibit size polydispersity, the average bead size is a strong function of neat SEBS, SEBS elastomer, and surfactant concentrations. Rheological studies suggest that all the bead mixtures exhibit shear thinning behavior, and the overall viscosity of a given bead mixture is a function of both SEBS elastomer and surfactant concentration. The developed SEBS elastic beads can be used as additives to enhance the viscoelastic properties of fluid-based systems like magnetorheological and damping fluids.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141271490","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

RELAXATION BEHAVIOR OF THREE-DIMENSIONAL PRINTED NBR-BASED RUBBER O-RINGS AS THE INNER PART OF ROD SEALS 三维印刷 nbr 基橡胶 O 形圈作为活塞杆密封件内部零件的松弛行为

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2024-05-23 DOI: 10.5254/rct.23.00036

Lion Sundermann, B. Klie, Ulrich Giese

引用次数: 0

Additive manufacturing of synthetic rubber ink with high solid content reinforced by networked silica 用网状白炭黑加固的高固含量合成橡胶墨水的加成法制造

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2024-05-11 DOI: 10.5254/rct-d-24-00008

Bahareh Tavousi Tabatabaei, Bipendra Basnet, Jae-Won Choi

{"title":"Additive manufacturing of synthetic rubber ink with high solid content reinforced by networked silica","authors":"Bahareh Tavousi Tabatabaei, Bipendra Basnet, Jae-Won Choi","doi":"10.5254/rct-d-24-00008","DOIUrl":"https://doi.org/10.5254/rct-d-24-00008","url":null,"abstract":"\u0000 Silica is a reinforcing filler commonly used in the production of environmentally friendly tires, as tires reinforced with silica have lower rolling resistance, which translates into reduced energy consumption and improved fuel economy. However, achieving the optimal dispersion of silica within the rubber matrix is crucial for maximizing its reinforcing effects. In this study, a three- dimensionally networked silica (NS) was introduced in various amounts to rubber inks to improve their tensile strength and increase miscibility to enable their use in additive manufacturing. The results show that synthetic rubber ink with a high content of styrene–butadiene rubber (90%) and reinforced by NS possesses adequate viscosity for use in the direct ink write (DIW) process. NS was confirmed to have an impact on the rheological properties and printability of the rubber ink as well as to improve the tensile strength of the printed parts. Different formulations were tested to study and facilitate the vulcanization process and identify the optimal curing conditions as well as the print parameters to use in DIW printing. The successful printing and vulcanization of various printed structures demonstrates the potential for using the developed printable ink in additive manufacturing. This study opens up new possibilities for creating rubber products (such as tire treads) with adequate flexibility and high tensile strength.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140988245","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

RELAXATION BEHAVIOR OF 3D PRINTED NBR-BASED RUBBER O-RINGS AS INNER PART OF ROD SEALS 3d 打印的基于 nbr 的橡胶 O 形圈作为杆密封件内部部件的松弛行为

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2024-05-11 DOI: 10.5254/rct-d-23-00036

Lion Sundermann, B. Klie, Ulrich Giese

引用次数: 0

Minimizing Temperature Deviations in Rubber Mixing Process using Artificial Neural Networks 利用人工神经网络最小化橡胶混合过程中的温度偏差

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2024-05-08 DOI: 10.5254/rct.24.00003

Marco Lukas, Sebastian Leineweber, B. Reitz, Ludger Overmeyer, Alexander Aschemann, B. Klie, Ulrich Giese

{"title":"Minimizing Temperature Deviations in Rubber Mixing Process using Artificial Neural Networks","authors":"Marco Lukas, Sebastian Leineweber, B. Reitz, Ludger Overmeyer, Alexander Aschemann, B. Klie, Ulrich Giese","doi":"10.5254/rct.24.00003","DOIUrl":"https://doi.org/10.5254/rct.24.00003","url":null,"abstract":"\u0000 Rubber mixing is a complex manufacturing process that poses challenges for process control due to the high number of control variables including mixing parameter settings, rheological behaviour, compound viscosity and batch-dependent material variations. Already small deviations from the control variables can influence the compound properties, leading to increased scrap rates. To address these challenges, this paper introduces an Artificial Intelligence (AI)-based approach to enhance process control in rubber mixing by predicting mixing temperatures from input variables. The proposed method utilizes Feedforward Neural Networks (FFN) to enable early identification of batch-specific temperature deviations, enabling systematic improvements with each new application. The FFN was trained on a diverse dataset encompassing various rubber recipes and batches. Post-training, the FFN demonstrated remarkable accuracy, achieving a Mean Absolute Percentage Error (MAPE) of 1.00% on the training dataset and 1.44% on the validation dataset, thereby showcasing its efficacy in predicting temperature fluctuations within the mixing process. Consequently, the FFN can determine the relevant input variables necessary to achieve specific mixing temperatures, providing a foundation for an automated control system in rubber mixing process. This paper outlines the system architecture of the FFN tailored for rubber mixing and provides a comprehensive overview of the experimental results.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141000783","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

ADDITIVE MANUFACTURING OF FLUOROELASTOMER LATEX: A DIRECT-INK-WRITING APPROACH 氟橡胶胶乳的增材制造：一种直接墨水书写方法

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2024-04-15 DOI: 10.5254/rct.24.00002

Sarath Suresh Kamath, Jae-Won Choi

{"title":"ADDITIVE MANUFACTURING OF FLUOROELASTOMER LATEX: A DIRECT-INK-WRITING APPROACH","authors":"Sarath Suresh Kamath, Jae-Won Choi","doi":"10.5254/rct.24.00002","DOIUrl":"https://doi.org/10.5254/rct.24.00002","url":null,"abstract":"\u0000 Fluoroelastomers (FKM) are beneficial materials with desirable properties such as resistance to chemical environments, aging, fluid, and high temperatures. However, FKM processing is restricted to using conventional tooling equipment to produce goods, where energy-intensive procedures including mixing, shaping, and vulcanization are a part of manufacturing. Because fossil fuels are used as the main energy source, these processes are carbon intensive. Our strategy is predicated on utilizing additive manufacturing (AM) as a tool-less manufacturing process exhibiting customizability, flexibility, and sustainability. AM machines consume energy only while building objects in contrast to energy-intensive machinery. Thus, our plan of action is to combine AM with a newly developed FKM ink that can be 3D15 printed with a direct ink write (DIW) process. The rheological characteristics, printing parameters, and mechanical properties of the formulated ink are investigated. We believe that this adaptable method will make it easier to produce 3D-printed FKM components with DIW, which could have a wide range of applications in engineering and consumer goods.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140701129","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

LATEX AGGLOMERATION AND COAGULATION IN LATICIFERS OF LIVE TARAXACUM KOK-SAGHYZ (RUBBER DANDELION) ROOTS 活蒲公英（橡胶蒲公英）根中的乳胶结块和凝固现象

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2024-04-15 DOI: 10.5254/rct.24.00007

Muhammad Akbar Abdul Ghaffar, Katrina Cornish

{"title":"LATEX AGGLOMERATION AND COAGULATION IN LATICIFERS OF LIVE TARAXACUM KOK-SAGHYZ (RUBBER DANDELION) ROOTS","authors":"Muhammad Akbar Abdul Ghaffar, Katrina Cornish","doi":"10.5254/rct.24.00007","DOIUrl":"https://doi.org/10.5254/rct.24.00007","url":null,"abstract":"\u0000 The commercialization of Taraxacum kok-saghyz (rubber dandelion) as an alternative rubber crop requires fundamental knowledge of latex and rubber yield and quality. Rubber particles are formed in the root laticifers from Golgi bodies via the vesicular trafficking system in the cytosol and are then translocated into the vacuoles for storage. However, when freshly harvested roots are processed to extract the latex (an aqueous suspension of rubber particles), much of the latex has already coagulated into solid rubber reducing the commercial viability of latex extraction from this species. The process of in vivo loss of the latex fraction was investigated histologically, by transmission electron microscopy, in roots of plants grown in soil or hydroponically. In both root types, some rubber particles agglomerated in the cytosol as a precursor to coagulation. Other rubber particles agglomerated then coagulated after rubber particles were translocated into vacuoles, and also after the cell internal cytoplasmic structure degraded. Uniquely large rubber particles were formed in the vacuoles of hydroponically-grown plants by particle coalescence but were not found in soil-grown roots. Eventually, some root laticifers of both root types filled with solid rubber. The instability of the aqueous latex phase post-ontogeny through rubber particle agglomeration, coalescence and coagulation suggests that commercial processes likely would involve root drying to convert residual latex into solid rubber followed by aqueous- or solvent-based extraction.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140702470","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

Effect of Deep Eutectic Solvent Pretreatment on Devulcanization of Waste Rubber Powder 深共晶溶剂预处理对废橡胶粉脱硫化的影响

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2024-04-03 DOI: 10.5254/rct-d-23-00049

Lining Gao, Li Li, Rui He, Xinqiu Zheng, Ruihao Qin

{"title":"Effect of Deep Eutectic Solvent Pretreatment on Devulcanization of Waste Rubber Powder","authors":"Lining Gao, Li Li, Rui He, Xinqiu Zheng, Ruihao Qin","doi":"10.5254/rct-d-23-00049","DOIUrl":"https://doi.org/10.5254/rct-d-23-00049","url":null,"abstract":"\u0000 The recycling of waste rubber is very important for environmental protection, but the compatibility problem restricts the recycling and application of waste rubber powder. Devulcanization of waste rubber powder (WRP) has been proven to be an effective method to improve the solubilization effect. The use of environmentally friendly non-toxic solvents can not only improve the devulcanization effect, but also avoid secondary pollution. Thus, in this paper, an environmentally friendly deep eutectic solvent (DES) is first prepared, and then applied to the devulcanization treatment of WRP. The results show that the prepared DES has a positive devulcanization effect, and the devulcanization rate can reach 50%. The devulcanization mechanism can be divided into two aspects. Firstly, adsorption and removal of sulfur- containing low molecular compounds. Secondly, destruction of the crosslinking structure and improvement of the fluidity. The microstructure observation showed that the rougher the surface of the desulfurized rubber powder was, the more conducive to the crosslinking reaction with the matrix material to form a uniform whole. The devulcanization mechanism of DES is divided into destroying the sulfur-containing cross-linked structure and adsorbing the sulfur-containing low molecular compounds. The surface of WRP after DES treatment is rougher and more porous, which is beneficial to the cross-linking reaction with the matrix material. Finally, the optimum process conditions for the decrosslinking effect are determined by orthogonal test as follows: liquid-solid ratio 15∶1, temperature 120°C, time 0.5 h.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140748654","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

A novel SBS compound via blending with PS-b-PMBL diblock copolymer for enhanced mechanical properties 一种通过与 PS-b-PMBL 二嵌段共聚物共混提高机械性能的新型 SBS 化合物

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2024-04-03 DOI: 10.5254/rct-d-23-00037

F. Versteeg, Ariq Raharjanto, Daniele Parisi, Francesco Picchioni

{"title":"A novel SBS compound via blending with PS-b-PMBL diblock copolymer for enhanced mechanical properties","authors":"F. Versteeg, Ariq Raharjanto, Daniele Parisi, Francesco Picchioni","doi":"10.5254/rct-d-23-00037","DOIUrl":"https://doi.org/10.5254/rct-d-23-00037","url":null,"abstract":"\u0000 Styrene-butadiene-styrene (SBS) rubbers stand as one of the most frequently employed thermoplastic elastomers globally. The upper operating temperature of SBS is limited by the glass transition temperature (Tg) of polystyrene, circa 100 °C. This study demonstrates a noteworthy enhancement in the properties of SBSs by introducing a diblock copolymer consisting of styrene and α-methylene-γ- butyrolactone (α-MBL). Polymers derived from α-MBL exhibit exceptional thermal stability, attributable to a glass transition temperature of 195 °C. Notably, α-MBL, also recognized as Tulipalin A, is a bio-renewable compound naturally found in tulips. This investigation encompasses both crosslinked and non-crosslinked blends of poly(styrene)-b-poly(α- methylene-γ-butyrolactone) diblock copolymer (PS-PMBL) and poly(styrene)-b-poly(butadiene)-b- poly(styrene) triblock copolymer, within the 0-20 wt.% PS-PMBL range. Thorough examination employing thermal analysis and linear shear rheology reveals that all blends surpass the properties of their pure SBS counterparts. Specifically, blending at 200 °C induces crosslinking between the polymers, yielding heightened Young’s modulus and complex viscosity, thereby resulting in a robust and rigid material compared to non-crosslinked blends. For non-crosslinked blends, an increase in strength is observed while maintaining commendable rubbery properties. Notably, the non-crosslinked blends permit the recycling of components (SBS and PS- PMBL) through the re-dissolving of rubber in tetrahydrofuran (THF). These findings present a promising avenue for the enhancement of rubbers through the incorporation of bio-renewable compounds.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140750706","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

INFLUENCE OF THE MIXTURE VISCOSITY ON MECHANICAL ANISOTROPY AND PROCESSABILITY OF AN NBR-BASED RUBBER MIXTURE FOR ADDITIVE MANUFACTURING 混合物粘度对用于增材制造的 nbr 基橡胶混合物的机械各向异性和加工性能的影响

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2024-04-01 DOI: 10.5254/rct.23.228315

Lion Sundermann, Benjamin Klie, Heike Wittek, Thomas Ebel, Kathrin Ottink, Ulrich Giese

{"title":"INFLUENCE OF THE MIXTURE VISCOSITY ON MECHANICAL ANISOTROPY AND PROCESSABILITY OF AN NBR-BASED RUBBER MIXTURE FOR ADDITIVE MANUFACTURING","authors":"Lion Sundermann, Benjamin Klie, Heike Wittek, Thomas Ebel, Kathrin Ottink, Ulrich Giese","doi":"10.5254/rct.23.228315","DOIUrl":"https://doi.org/10.5254/rct.23.228315","url":null,"abstract":"<p>Rubber-based polymers with high carbon black content can be three-dimensionally (3D) printed using the additive manufacturing of elastomers process. However, high-viscosity materials limit printing resolution, making it difficult to produce fine structures and high-precision parts, especially two-component (2K) parts. The viscosity of a rubber compound used for rod seal applications was reduced and adjusted using Nipol® 1312 liquid rubber and the alkyl sulfonic phenyl ester Mesamoll® II as plasticizers to lower the torque level during extrusion when a reduced nozzle diameter of 0.4 mm is used in 3D printing. In addition, the flowability of the compound was enhanced prior to vulcanization of the part, which could increase the layer–layer bond and thus reduce the mechanical anisotropy typically induced by fused filament fabrication. Using a viscosity-optimized rubber compound, a 2K rod seal consisting of a thermoplastic polyurethane with elastomeric properties and an acrylonitrile rubber-based O-ring was produced and dynamically tested for leakage.</p>","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140595372","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