Rubber Chemistry and Technology最新文献_第10页

FOAMING AND MOISTURE CROSSLINKING OF VINYL TRIETHOXY SILANE GRAFTED ETHYLENE–PROPYLENE–DIENE TERPOLYMER 乙烯基三乙氧基硅烷接枝乙烯-丙烯-二烯三元共聚物的发泡和湿交联

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2022-01-03 DOI: 10.5254/rct.21.78953

Zhengwei Lin, Qinghong Zhang, Gongliang Wang, Jie Mao, M. Hoch, Xinyan Shi

{"title":"FOAMING AND MOISTURE CROSSLINKING OF VINYL TRIETHOXY SILANE GRAFTED ETHYLENE–PROPYLENE–DIENE TERPOLYMER","authors":"Zhengwei Lin, Qinghong Zhang, Gongliang Wang, Jie Mao, M. Hoch, Xinyan Shi","doi":"10.5254/rct.21.78953","DOIUrl":"https://doi.org/10.5254/rct.21.78953","url":null,"abstract":"\u0000 Moisture crosslinking of polyolefins has attracted increasing attention because of its high efficiency, low cost, and easy processing. However, the crucial shortcoming of moisture crosslinking is that the side reaction of peroxide scorch (precrosslinking) simultaneously occurs in silane grafting. It has been recognized that making peroxide precrosslinking useful is an effective way to broaden the application of moisture crosslinking. A novel foaming process combined with moisture crosslinking is proposed. The matrix of ethylene–propylene–diene terpolymer grafted with silane vinyl triethoxysilane (EPDM-g-VTES) was prepared by melt grafting, with dicumyl peroxide as initiator. Foaming was then carried out with azodicarbonamide (AC) as the blowing agent by making use of precrosslinking. Subsequently, the EPDM-g-VTES foams were immersed in a water bath to achieve moisture crosslinking with dibutyl tin dilaurate as the catalyst. The results showed that VTES was grafted onto EPDM and the EPDM-g-VTES foams were successfully crosslinked by moisture. The EPDM-g-VTES compounds with AC obtained great cells by compression molding with the help of precrosslinking. The mechanical property of the EPDM-g-VTES foam was improved by moisture crosslinking. The moisture-cured foam with 4 wt% AC had an expansion ratio of about three times, which could bear large deformation and showed a high energy-absorption effect.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48784095","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

SPECIALTY NATURAL RUBBER LATEX FOAM: FOAMABILITY STUDY AND FABRICATION PROCESS 特种天然胶乳泡沫:发泡性研究及制造工艺

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2021-12-27 DOI: 10.5254/rct.21.78938

Roslim Ramli, A. Chai, Jee-Hou Ho, S. Kamaruddin, F. Rasdi, D. S. D. De Focatiis

{"title":"SPECIALTY NATURAL RUBBER LATEX FOAM: FOAMABILITY STUDY AND FABRICATION PROCESS","authors":"Roslim Ramli, A. Chai, Jee-Hou Ho, S. Kamaruddin, F. Rasdi, D. S. D. De Focatiis","doi":"10.5254/rct.21.78938","DOIUrl":"https://doi.org/10.5254/rct.21.78938","url":null,"abstract":"\u0000 Specialty natural rubber (SpNR) latex, namely, deproteinized natural rubber (DPNR) latex and epoxidized natural rubber (ENR) latex, has been produced to meet specific product's requirements. However, SpNR is normally used in the form of block rubber to manufacture dry rubber products such as tires and automotive parts. The applications of SpNR latex into latex foam products will be diversified. Findings indicate that foamability of SpNR latex is lower compared to normal latex (LATZ) but shows longer stability time after foamed. Findings also indicate that foam collapse and foam coagulate are two main challenges in the fabrication process of SpNR latex foam. Despite these challenges, SpNR latex foam can be fabricated at different density levels. During the foaming process, additional foaming agent is required to fabricate a SpNR latex foam, which is different from fabricating a normal NR latex foam, especially at low latex foam density. Consequently, a higher level of sodium silicofluoride, used as the gelling agent, is required to set the cell structure of the foam. Findings also indicate that foam density influenced the gelling time and volume shrinkage of the SpNR latex foam. An ideal compounding, foaming, and gelling formulation to fabricate SpNR latex foam via Dunlop batch foaming process has been developed. Morphological study showed that all latex foams are open-cell structure, with lower density foam exhibiting higher porosity and mean pore size. Comparison on hysteresis behavior between DPNR and ENR latex foam indicated that ENR latex foam exhibits higher hysteresis loss ratio compared to DPNR latex foam.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44991025","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: 8

NUMERICAL ANALYSIS OF HEAT TRANSFER AND CHEMICAL REACTION COUPLING IN THE RUBBER SEAL VULCANIZATION PROCESS 橡胶密封硫化过程中传热与化学反应耦合的数值分析

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2021-12-27 DOI: 10.5254/rct.21.78984

Zhaoxiang Zhang, X. Jia, Fei Guo, Xing Huang, Yuming Wang

引用次数: 3

CHANGES IN THE MECHANICAL, MICRO-, AND NANO-STRUCTURAL PROPERTIES OF REINFORCED VULCANIZED NATURAL RUBBER COMPOUNDS: THEIR DEPENDENCE ON THE SiO2/CB RATIO 增强硫化天然橡胶化合物的力学、微观和纳米结构性能的变化：它们与SiO2/CB比的关系

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2021-11-17 DOI: 10.5254/rct.21.78991

A. Marzocca, Ana L. Rodríguez Garraza, Sebastián Anbinder, C. Macchi, A. Somoza

引用次数: 0

ASSESSMENT OF A NEW ISOTROPIC HYPERELASTIC CONSTITUTIVE MODEL FOR A RANGE OF RUBBERLIKE MATERIALS AND DEFORMATIONS 一类类橡胶材料及其变形的新型各向同性超弹性本构模型的评估

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2021-11-15 DOI: 10.5254/rct.21.78975

A. Anssari-Benam, A. Bucchi, C. Horgan, G. Saccomandi

{"title":"ASSESSMENT OF A NEW ISOTROPIC HYPERELASTIC CONSTITUTIVE MODEL FOR A RANGE OF RUBBERLIKE MATERIALS AND DEFORMATIONS","authors":"A. Anssari-Benam, A. Bucchi, C. Horgan, G. Saccomandi","doi":"10.5254/rct.21.78975","DOIUrl":"https://doi.org/10.5254/rct.21.78975","url":null,"abstract":"\u0000 The choice of an appropriate strain energy function W is key to accurate modeling and computational finite element analysis of the mechanical behavior of unfilled non-crystalizing rubberlike materials. Despite the existing variety of models, finding a suitable model that can capture many deformation modes of a rubber specimen with a single set of parameter values and satisfy the a priori mathematical and structural requirements remains a formidable task. Previous work proposed a new generalized neo-Hookean W (I1) function, showing a promising fitting capability and enjoying a structural basis. We now use two extended forms of that model that include an I1 term adjunct, W (I1, I2), for application to various boundary value problems commonly encountered in rubber mechanics applications. Specifically, two functional forms of the I2 invariant are considered: a linear function and a logarithmic function. The boundary value problems of interest include the in-plane uniaxial, equi-biaxial, and pure shear deformations and simple shear, inflation, and nonhomogeneous deformations such as torsion. By simultaneous fitting of each model to various deformation modes of rubber specimens, it is demonstrated that a single set of model parameter values favorably captures the mechanical response for all the considered deformations of each specimen. It is further shown that the model with a logarithmic I2 function provides better fits than the linear function. Given the functional simplicity of the considered W (I1, I2) models, the low number of model parameters (three in total), the structurally motivated bases of the models, and their capability to capture the mechanical response for various deformations of rubber specimens, the considered models are recommended as a powerful tool for practical applications and analysis of rubber elasticity.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45000918","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: 11

ISSUES WITH APPROACHES FOR SIMULATING AGING OF NUCLEAR POWER PLANT CABLE MATERIALS 核电站电缆材料老化模拟方法的问题

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2021-11-10 DOI: 10.5254/rct.21.78976

K. Gillen, M. Celina

{"title":"ISSUES WITH APPROACHES FOR SIMULATING AGING OF NUCLEAR POWER PLANT CABLE MATERIALS","authors":"K. Gillen, M. Celina","doi":"10.5254/rct.21.78976","DOIUrl":"https://doi.org/10.5254/rct.21.78976","url":null,"abstract":"\u0000 Over the past 20 y, the International Electrotechnical Commission and the International Atomic Energy Agency have published several Technical Documents describing recommended methods for carrying out accelerated radiation plus temperature aging of cable materials in nuclear power plants. These methods include the power law method, the time-dependent model, the dose to equivalent damage approach, and the simplified method approach. Because of the expected and observed changes in chemistry that occur as aging conditions transition radiation–temperature space, we highlight issues with the time-dependent and simplified method approaches by showing that they do not simulate the chemistry occurring under ambient conditions. The DED approach and a recent modification, the Matched Accelerated Conditions approach, can handle the changes in chemistry for many important cable materials and therefore offer more confident accelerated simulations. Problems with the power law method are then briefly described. Also discussed are the significant issues that occur when trying to simulate the aging of semicrystalline cable materials that show inverse-temperature effects. For these materials, degradation rates under radiation can increase as the aging temperature drops below ∼60 °C, in temperature regions where typical ambient aging conditions occur. A possible approach for dealing with such materials is suggested.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41294618","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

SYNTHESIS AND CHARACTERIZATION OF GRAPHENE SHEETS DECORATED WITH CARBON BLACK BY DIRECT PYROLYSIS OF A MOLASSES–CARBON BLACK MIXTURE AS A POTENTIAL VERSATILE FILLER FOR RUBBER 糖蜜-炭黑混合物直接热解制备炭黑修饰石墨烯片及其性能研究

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2021-10-21 DOI: 10.5254/rct.21.79928

A. Roy, Saptarshi Kar, Ranjan Ghosal, R. Mukhopadhyay, K. Naskar, A. Bhowmick

{"title":"SYNTHESIS AND CHARACTERIZATION OF GRAPHENE SHEETS DECORATED WITH CARBON BLACK BY DIRECT PYROLYSIS OF A MOLASSES–CARBON BLACK MIXTURE AS A POTENTIAL VERSATILE FILLER FOR RUBBER","authors":"A. Roy, Saptarshi Kar, Ranjan Ghosal, R. Mukhopadhyay, K. Naskar, A. Bhowmick","doi":"10.5254/rct.21.79928","DOIUrl":"https://doi.org/10.5254/rct.21.79928","url":null,"abstract":"\u0000 A mixture of molasses and carbon black was pyrolyzed in an inert atmosphere, which resulted in graphene of high quality, comprising of three to four layers on average with carbon black particles distributed over the graphene sheets. Molasses is the viscous dark colored slurry which is obtained at the last stage of refinement of sugar from sugarcane, in which sucrose is present as the major chemical component. Carbon black was also used as a substrate for the growth of graphene. The carbon black decorated graphene hybrid nanostructure was thoroughly characterized by different techniques and improved the failure properties of cured styrene butadiene rubber when incorporated into the rubber matrix. Bound rubber content increased by 50% with the hybrid filler compared to carbon black at 45 phr filler loading. The hybrid filler displayed 63% enhancement in the tensile strength at 2 phr filler loading and 86% increase at 45 phr filler loading, compared to the carbon black filled rubbers at the same loading. The vulcanizates containing the novel filler also exhibited improved abrasion resistance, ice traction, and wet traction and decreased rolling resistance compared to the carbon black filled systems. The new filler exhibited fair value of specific capacitance, 127 F/g when incorporated in an uncured rubber latex matrix. The hybrid filler synthesized, characterized, and studied thus can be classified as a versatile smart filler for rubber nanocomposites with a range of functionalities from mechanical reinforcement to electrochemical properties.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45421923","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

ENTIRE-REGION CONSTITUTIVE RELATION FOR TRELOAR'S DATA TRELOAR数据的全区域本构关系

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2021-10-15 DOI: 10.5254/rct.21.78993

L. Han, X. Peng, L. X. Li

引用次数: 0

ADDITIVE MANUFACTURING AND VULCANIZATION OF CARBON BLACK–FILLED NATURAL RUBBER–BASED COMPONENTS 炭黑填充天然橡胶基组件的增材制造和硫化

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2021-10-15 DOI: 10.5254/rct.21.79906

Sebastian Leineweber, Lion Sundermann, Lars Bindszus, L. Overmeyer, B. Klie, Heike Wittek, U. Giese

{"title":"ADDITIVE MANUFACTURING AND VULCANIZATION OF CARBON BLACK–FILLED NATURAL RUBBER–BASED COMPONENTS","authors":"Sebastian Leineweber, Lion Sundermann, Lars Bindszus, L. Overmeyer, B. Klie, Heike Wittek, U. Giese","doi":"10.5254/rct.21.79906","DOIUrl":"https://doi.org/10.5254/rct.21.79906","url":null,"abstract":"\u0000 Additive manufacturing of thermoplastics or metals is a well-approved sustainable process for obtaining rapidly precise and individual technical components. Except for crosslinked silicone rubber or thermoplastic elastomers, there is no method of additive manufacturing of elastomers. Based on the development of the additive manufacturing of elastomers (AME) process, the material group of rubber-based cured elastomers may gain first access to the process field of three-dimensional (3D) printing. Printing and crosslinking of rubber is separated into two steps. In the first step, printing is realized by extrusion of the rubber by using a twin-screw extruder, which works according to the derived fused-filament-fabrication principle. In the second step, the component is vulcanized in a high-pressure hot-air autoclave. Because of the plastic flow behavior of non–crosslinked rubber materials, a thermoplastic shell is probably needed to maintain the geometry and position of the additively manufactured rubber. In this way, one layer of thermoplastic and one layer of rubber are printed alternatingly until the component is finished. Afterward, the manufactured binary component is placed in an autoclave to obtain the elastomer after vulcanization under a hot-air and high-pressure atmosphere. Then, the thermoplastic shell is removed from the elastomer and can subsequently be recycled. As compared with conventional thermoplastics, the high viscosity of rubber during processing and its instable shape after extrusion are challenging factors in the development of the AME. This contribution will show a modified 3D printer; explain the printing process from the designed component, via shell generation, to the vulcanized component; and show first printed components.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47403682","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: 3

ADVANCES IN TECHNIQUES AND APPLICATIONS OF RUBBER SURFACE GRAFTING MODIFICATION 橡胶表面接枝改性技术及应用进展

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2021-10-15 DOI: 10.5254/rct.21.79893

Xiaolong Lu, S. Cai, Ben Niu, Xian Li, Qin He, Xianru He

引用次数: 2