Rubber Chemistry and Technology最新文献_第7页

EFFECTS OF EVEN FUNCTIONAL GROUP DISTRIBUTION IN EMULSION STYRENE–BUTADIENE RUBBER PREPARED BY REVERSIBLE ADDITION–FRAGMENTATION CHAIN TRANSFER POLYMERIZATION ON THE PROPERTIES OF SILICA-FILLED COMPOUNDS 可逆加成-断裂链转移聚合制备的乳液丁苯橡胶中均匀官能团分布对硅填充化合物性能的影响

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2022-08-26 DOI: 10.5254/rct.22.77993

Sanghoon Song, Kiwon Hwang, Donghyuk Kim, Gyeongchan Ryu, B. Ahn, H. Jeon, S. Chung, Wonho Kim

{"title":"EFFECTS OF EVEN FUNCTIONAL GROUP DISTRIBUTION IN EMULSION STYRENE–BUTADIENE RUBBER PREPARED BY REVERSIBLE ADDITION–FRAGMENTATION CHAIN TRANSFER POLYMERIZATION ON THE PROPERTIES OF SILICA-FILLED COMPOUNDS","authors":"Sanghoon Song, Kiwon Hwang, Donghyuk Kim, Gyeongchan Ryu, B. Ahn, H. Jeon, S. Chung, Wonho Kim","doi":"10.5254/rct.22.77993","DOIUrl":"https://doi.org/10.5254/rct.22.77993","url":null,"abstract":"\u0000 Recently, considerable attention has been paid to the development of new functionalized polymers to improve the fuel efficiency of vehicles by reducing the rolling resistance of tires to adhere to strict CO2 emission regulations. Accordingly, multifunctionalized (MF) reversible addition–fragmentation chain transfer (RAFT) emulsion styrene–butadiene rubbers (ESBR) were synthesized, in which chain-end and in-chain functionalization were performed simultaneously by introducing a third monomer (glycidyl methacrylate; GMA) using RAFT polymerization. Compared with GMA ESBR, in which GMA is introduced as a third monomer by conventional radical polymerization (CRP), there was an even distribution of GMA per chain in the MF-RAFT ESBR. After preparing the silica-filled compounds, vulcanizate structure analysis and mechanical property evaluation of the compounds were performed. The MF-RAFT ESBR prepared by RAFT polymerization exhibited superior in-chain functionalization efficiency compared with GMA ESBR prepared by CRP because of the even distribution of GMA and higher crosslink density. Consequently, MF-RAFT ESBR compound showed superior silica dispersion, abrasion resistance, and lower rolling resistance compared with the GMA ESBR compound.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44516085","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: 1

NEW AND HIGHLY EFFICIENT METHOD TO MEASURE STEADY SHEAR VISCOSITY AND WALL SLIP OF RUBBER COMPOUNDS: CLOSED-BOUNDARY RHEOMETER (RPA) 新型高效测量橡胶胶料稳定剪切粘度和壁滑移的方法——封闭边界流变仪(rpa)

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2022-08-09 DOI: 10.5254/rct.22.77929

H. Burhin, Thomas Rauschmann, H. Graf

{"title":"NEW AND HIGHLY EFFICIENT METHOD TO MEASURE STEADY SHEAR VISCOSITY AND WALL SLIP OF RUBBER COMPOUNDS: CLOSED-BOUNDARY RHEOMETER (RPA)","authors":"H. Burhin, Thomas Rauschmann, H. Graf","doi":"10.5254/rct.22.77929","DOIUrl":"https://doi.org/10.5254/rct.22.77929","url":null,"abstract":"\u0000 The rubber process analyzer was commercialized by Monsanto Rubber Instrument and Equipment company in the early 1990s. In its initial version, the RPA was able to perform only oscillatory-type tests, which varied in frequency and strain. Later, it offered a controlled strain–stress relaxation test. Only recently and not for all models has a controlled steady shear test been made available. Using this type of test, the instrument has successfully measured steady shear viscosity with high repeatability without correction. The results fit well with other rheometers or viscometers when no-slip conditions are ensured. The closed-boundary configuration prevents edge fracture, as commonly experienced with open-boundary rheometers (DMA) on high-viscosity, high-elasticity materials. A comparison of results using grooved dies (no-slip) and polished dies (slip) readily provides wall slip velocity under constant pressure. The results of wall slip versus shear stress follow a power-law function per the Navier slip law [F(V) = −k(Vr)e]. This method separates the shear rate from pressure effects on wall slip. It questions pressure-driven flow instruments (capillary rheometer), which use pressure measurements for shear stress calculations, and prevents an easy and controlled change of the die surface roughness.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45343906","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: 2

PROCESS OPTIMIZATION OF GREEN AQUEOUS-BASED EXTRACTION TECHNOLOGY OF TARAXACUM KOK-SAGHYZ RUBBER 绿色水基提取蒲公英橡胶工艺优化

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2022-08-03 DOI: 10.5254/rct.22.77883

Ruifeng Zhao, Genshi Liu, Rongzhen Fu, Jichuan Zhang, Xiang Jie, Yiyang Dong, Zifeng He, Q. Nie

引用次数: 0

MECHANICAL PROPERTIES OF NATURAL RUBBER AND STYRENE–BUTADIENE RUBBER NANOCOMPOSITES WITH NANOFILLERS HAVING DIFFERENT DIMENSIONS AND SHAPES AT LOW FILLER LOADING 不同尺寸和形状纳米填料的天然橡胶和丁苯橡胶纳米复合材料在低填充量下的力学性能

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2022-08-03 DOI: 10.5254/rct.22.77933

K. Surya, A. Bhowmick

{"title":"MECHANICAL PROPERTIES OF NATURAL RUBBER AND STYRENE–BUTADIENE RUBBER NANOCOMPOSITES WITH NANOFILLERS HAVING DIFFERENT DIMENSIONS AND SHAPES AT LOW FILLER LOADING","authors":"K. Surya, A. Bhowmick","doi":"10.5254/rct.22.77933","DOIUrl":"https://doi.org/10.5254/rct.22.77933","url":null,"abstract":"\u0000 Reinforcement of rubber by nanofillers has been a topic of great interest in recent years. This work compares the reinforcing efficiency of nanofillers with different topologies such as spherical (carbon black and silica), fibrous (silicon carbide nanofibers and carbon nanotubes), and sheetlike (nanoclays, expanded graphite, and graphene) in two different diene rubbers (natural rubber [NR] and styrene–butadiene rubber [SBR]) at low loadings. Tensile strength improved by 88% in the case of NR and 57% in the case of SBR by the addition of just 3 phr of graphene nanoplatelets with high aspect ratio and surface area. An increase in the Mooney–Rivlin constant (C1) with filler loading variation was also observed for these filler systems in NR and SBR. The analysis of the composites using a tube model showed that the confinement of rubber chains due to the presence of fillers with a high aspect ratio gave rise to a lower tube diameter. The addition of nanofillers resulted in higher hysteresis losses, confirming their ability for higher energy dissipation. A higher Payne effect was observed in the composites due to the formation of a percolating filler network, which was accompanied by a weak strain overshoot in the loss modulus. Dynamical mechanical analysis of the composites showed a significant increase in the storage modulus of the composites at both low and room temperatures. The reduction observed in the tan δ was correlated with the crosslink density of the composites.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44036682","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

MANUFACTURING OF ELASTOMERIC SUBSTRATES FOR STRETCHABLE PRINTED ELECTRONICS 可拉伸印刷电子产品用弹性基板的制造

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2022-07-22 DOI: 10.5254/rct.22.77936

S. Deshmukh, Erin P. Keaney, Carol Barry, J. Mead

{"title":"MANUFACTURING OF ELASTOMERIC SUBSTRATES FOR STRETCHABLE PRINTED ELECTRONICS","authors":"S. Deshmukh, Erin P. Keaney, Carol Barry, J. Mead","doi":"10.5254/rct.22.77936","DOIUrl":"https://doi.org/10.5254/rct.22.77936","url":null,"abstract":"\u0000 Stretchable electronics are being used in applications such as wearable electronics, robotic skin, wearable health-monitoring devices, and smart textiles due to their excellent mechanical conformability through stretching, flexing, twisting, and folding. This work focuses on creating printable stretchable substrates based on butyl rubber (IIR), combined with a ferroelectric filler, barium strontium titanate (BST). BST has unique properties, including the ability to tune the dielectric properties by applying a bias to the substrate. A high loading of BST was incorporated to tailor the dielectric properties of the substrate. This work investigated the effect of three different cure systems on the properties, including interaction with a silver ink. For all cure systems, cure and scorch time decreased with increases in BST loading. A phenolic cure did not affect the ink conductivity, whereas the sulfur-cured systems resulted in nonconductive ink. For the phenolic-cured substrate, the tensile strength increased and the elongation decreased with increasing filler loading. The elastomer could be filled with up to 40 vol. % BST while still maintaining elongation greater than 200%.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46774941","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: 1

INTRODUCING TEA POLYPHENOLS AND VITAMIN C TO IMPROVE THE IN SITU HYDROGENATION AND REDUCTION PROCESS OF NBR AND NBR/GO LATEX 引入茶多酚和维生素c，改进丁腈橡胶和丁腈橡胶/氧化胶乳的原位加氢还原工艺

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2022-05-26 DOI: 10.5254/rct.22.77994

Xiaolei Wang, H. Pan, Lan Cao, Chunfu Wang, Chengzhong Zong

引用次数: 0

IMPROVED ADHESION IN ELASTOMERIC LAMINATES USING ELASTOMER BLENDS 使用弹性体混合物改善弹性体层压板的附着力

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2022-05-13 DOI: 10.5254/rct.22.78968

Jianan Yi, Erin P. Keaney, Jinde Zhang, C. Hansen, W. Zukas, J. Mead

{"title":"IMPROVED ADHESION IN ELASTOMERIC LAMINATES USING ELASTOMER BLENDS","authors":"Jianan Yi, Erin P. Keaney, Jinde Zhang, C. Hansen, W. Zukas, J. Mead","doi":"10.5254/rct.22.78968","DOIUrl":"https://doi.org/10.5254/rct.22.78968","url":null,"abstract":"\u0000 Interlayer adhesion between distinct rubber compositions in elastomeric laminates has been pursued by a variety of approaches, including treating surfaces, introducing assistant chemicals, and interposing a “transition layer.” Each approach, however, may be specific to the elastomer chemistries and may not be easily transferred to other rubber composition pairs in laminates. These limitations were overcome by inserting a layer at the interface that is a blend of each of the elastomer compositions of the adjacent layers and that increases the interfacial adhesion strength of the resultant laminates. This approach was demonstrated using three elastomer systems: fluoroelastomer (FKM), acrylonitrile–butadiene rubber (NBR), and isobutylene–isoprene rubber (IIR). The adhesion in the three-layer laminate (FKM/NBR/IIR) was improved with the addition of an FKM-NBR blend layer between the FKM and NBR layers and the addition of an NBR-IIR blend layer between the NBR and IIR layers. The five-layer laminate (FKM/[FKM-NBR blend]/NBR/[NBR-IIR blend]/IIR) was also fabricated. Interfacial adhesion was evaluated using the T-peel test according to ASTM D1876, which showed that the blends provided improved adhesion. Scanning electron microscope images were used to study the interface region. The proposed idea offers a general approach to improve interfacial strength that is widely applicable to other multilayer elastomer laminates.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46484743","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: 1

PREPARATION AND CHARACTERIZATION OF SELF-HEALING MAGNETORHEOLOGICAL ELASTOMERS 自愈磁流变弹性体的制备与表征

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2022-05-06 DOI: 10.5254/rct.22.78927

J. Wang, Q. Zhang, J. Lv, Y. T. Wei

{"title":"PREPARATION AND CHARACTERIZATION OF SELF-HEALING MAGNETORHEOLOGICAL ELASTOMERS","authors":"J. Wang, Q. Zhang, J. Lv, Y. T. Wei","doi":"10.5254/rct.22.78927","DOIUrl":"https://doi.org/10.5254/rct.22.78927","url":null,"abstract":"\u0000 Magnetorheological elastomers (MREs) are a kind of active control smart material, and their critical problem is that their ferromagnetic particles are too large, which causes holes to develop and results in MREs with poor mechanical performance and fatigue resistance. In this work, liquid butadiene acrylonitrile rubber (NBR)-synthesized phenolic resin microcapsules were synthesized and applied to MREs as a self-healing agent, effectively reducing the number of holes caused by ferromagnetic particles. The structure of the self-healing agent was determined by Fourier transform infrared (FT-IR) spectroscopy, thermal gravimetric analysis (TGA), and scanning electron microscopy (SEM). The results indicated that a self-healing agent was successfully synthesized, the core of the capsule was spherical liquid nitrile rubber, and the wall of the capsule was composed of phenolic resin microspheres. Furthermore, the SEM images of the MREs showed that the number of cavities caused by ferromagnetic particles was greatly reduced after the addition of the self-healing agent, and the X-ray photoelectron spectroscopy (XPS) results of the MREs indicated the formation of a chemical bond between Fe and O. In addition, the mechanical properties and fatigue resistance of the MRE materials with the self-healing agent were improved. Under 100% strain and with the same number of cycles, the crack growth rate of MREs without self-healing agent is faster by about 329%, and the crack length is longer by about 220% than those of MREs with self-healing agent.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":"17 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41277447","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: 1

ALTERNATIVE USE OF THE SENTMANAT EXTENSIONAL RHEOMETER TO INVESTIGATE THE RHEOLOGICAL BEHAVIOR OF INDUSTRIAL RUBBERS AT VERY LARGE DEFORMATIONS senmanat拉伸流变仪的替代使用，以研究工业橡胶在非常大的变形下的流变行为

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2022-05-04 DOI: 10.5254/rct.21.77948

D. Parisi, S. Coppola, S. Righi, Giacomo Gagliardi, F. Grasso, F. Bacchelli

{"title":"ALTERNATIVE USE OF THE SENTMANAT EXTENSIONAL RHEOMETER TO INVESTIGATE THE RHEOLOGICAL BEHAVIOR OF INDUSTRIAL RUBBERS AT VERY LARGE DEFORMATIONS","authors":"D. Parisi, S. Coppola, S. Righi, Giacomo Gagliardi, F. Grasso, F. Bacchelli","doi":"10.5254/rct.21.77948","DOIUrl":"https://doi.org/10.5254/rct.21.77948","url":null,"abstract":"\u0000 Extensional deformations represent an effective stimulus to explore the rich rheological response of branched polymers and elastomers, enabling the design of polymers with specific molecular structure. However, probing the polymer behavior at large deformations is often limited by the experimental devices. We here present an alternative use of the Sentmanat Extensional Rheometer (SER) that allows Hencky strain units much larger than the maximum value achievable, ∼3.6. The proposed procedure consists of an oblique positioning of the sample in the measuring area. If a small inclination of the sample is used, the departure from the ideal uniaxial flow is negligible at Hencky strains <1, and nearly zero for larger values. Experimental results in the linear viscoelastic regime are compared with the double reptation model in order to discern polydispersity and branching effects, whereas the extensional rheology data are contrasted with the molecular stress function theory (MSF), revealing important information about the polymer structure, especially on the long-chain branching (LCB). Finally, the analysis of sample failure upon elongation allowed us to correlate the polymer structure to the rheological behavior during mixing processes.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42577640","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: 1

VULCANIZATION FOR REINFORCEMENT OF RUBBER 橡胶增强硫化

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2022-03-11 DOI: 10.5254/rct.22.77939

Y. Ikeda, K. Miyaji, T. Ohashi, T. Nakajima, P. Junkong

引用次数: 1