Rubber Chemistry and Technology最新文献_第6页

A THREE-DIMENSIONAL TIRE RING ON ELASTIC FOUNDATION MODEL IN ROLLING CONTACT WITH APPLICATION TO INTELLIGENT TIRES 基于弹性基础的三维轮胎环滚动接触模型及其在智能轮胎中的应用

4区工程技术

Rubber Chemistry and Technology Pub Date : 2023-07-01 DOI: 10.5254/rct-d-23-00018

Delei Min, Yintao Wei

引用次数: 0

ELASTIC FIELDS AT CORNERS OF HIGHLY STRETCHABLE MATERIALS ARE CONCENTRATED BUT BOUNDED 高可拉伸材料的弹性场是集中而有界的

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2023-06-14 DOI: 10.5254/rct.2376991

S. Hassan, J. Steck, Z. Suo

{"title":"ELASTIC FIELDS AT CORNERS OF HIGHLY STRETCHABLE MATERIALS ARE CONCENTRATED BUT BOUNDED","authors":"S. Hassan, J. Steck, Z. Suo","doi":"10.5254/rct.2376991","DOIUrl":"https://doi.org/10.5254/rct.2376991","url":null,"abstract":"\u0000 Corners concentrate elastic fields and often initiate fracture. For small deformations, it is well established that the elastic field around a corner is power-law singular. For large deformations, we show here that the elastic field around a corner is concentrated but bounded. We conduct computation and an experiment on the lap shear of a highly stretchable material. A rectangular sample was sandwiched between two rigid substrates, and the edges of the stretchable material met the substrates at 90° corners. The substrates were pulled to shear the sample. We computed the large-deformation elastic field by assuming several models of elasticity. The theory of elasticity had no length scale, and lap shear was characterized by a single length, the thickness of the sample. Consequently, the field in the sample was independent of any length once the spatial coordinates were normalized by the thickness. We then lapped shear samples of a polyacrylamide hydrogel of various thicknesses. For all samples, the fracture initiated from the corners, at a load independent of thickness. These experimental findings agree with the computational prediction that large-deformation elastic fields at corners are concentrated but bounded.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42114523","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

CURE MAPPING IN RUBBER VULCANIZATION: PEROXIDE CURES OF EPDM 橡胶硫化中的硫化图:三元乙丙橡胶的过氧化硫化

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2023-06-14 DOI: 10.5254/rct.23.76953

M. Bennett, Michael Hough, B. Willoughby

{"title":"CURE MAPPING IN RUBBER VULCANIZATION: PEROXIDE CURES OF EPDM","authors":"M. Bennett, Michael Hough, B. Willoughby","doi":"10.5254/rct.23.76953","DOIUrl":"https://doi.org/10.5254/rct.23.76953","url":null,"abstract":"\u0000 “Cure mapping” takes the complementary viscous and elastic outputs of cure rheometry and plots them against each other, so that the resultant plot is no longer in the time domain. Such outputs are routinely available for rubber vulcanization, and in this paper we explore the cure maps for a series of peroxide cures on EPDM. The cure map from moving die rheometer outputs is a plot of viscous torque against elastic torque, and the variables explored herein include the levels of peroxide and coagent. The plot follows the conversion of viscous to elastic character, and its slope can be considered to reflect the balance of reactions that promote or impede this conversion. By this approach, the effect of the above-mentioned cure variables on the competitive reactions of cure is explored. The dominant reactions can be revealed, to provide a fresh perspective on the changes occurring during an industrial rubber vulcanization. But the value of cure mapping extends beyond mechanistic insights: this study has shown the vulcanization cure maps to be particularly sensitive to batch effects. A coherent picture emerges to reveal how routine cure data can be productively exploited to characterize process history and cure.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44105752","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

THIOSULFINATE-DERIVED THIOALDEHYDES AS ENOPHILES FOR MODIFICATION AND VULCANIZATION OF CIS-1,4-POLYISOPRENE VIA ALDER-ENE REACTIONS 硫代亚磺酸衍生的硫代醛作为亲烯剂，通过醛烯反应对顺式1,4-聚异戊二烯进行改性和硫化

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2023-05-12 DOI: 10.5254/rct.23.76030

L. Jia, Nathan D. Schmitz

引用次数: 0

AGGREGATION BEHAVIORS OF PENDANT PHOSPHORYLCHOLINE GROUPS AND THEIR INFLUENCE ON POLYISOPRENE PROPERTIES 侧链磷酰胆碱基团的聚集行为及其对聚异戊二烯性能的影响

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2023-04-21 DOI: 10.5254/rct.23.76948

Rong Zhang, Shiqi Li, Ran Xu, Chang-Cheng Wang, Yinghan Wang, Guangsu Huang, Maoz hu Tang, Yun-Xiang Xu

引用次数: 0

EFFECT OF MOLECULAR ENVIRONMENT ON PROTEIN RUBBER PROPERTIES 分子环境对蛋白质橡胶性能的影响

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2023-04-21 DOI: 10.5254/rct.23.76957

Natasha Chauhan, J. Barone

{"title":"EFFECT OF MOLECULAR ENVIRONMENT ON PROTEIN RUBBER PROPERTIES","authors":"Natasha Chauhan, J. Barone","doi":"10.5254/rct.23.76957","DOIUrl":"https://doi.org/10.5254/rct.23.76957","url":null,"abstract":"\u0000 Many natural organisms use “protein rubbers” to store and release an imposed strain energy with high efficiency to make motion easier. Protein rubbers exist in a complicated environment surrounded by water and other molecules such as sugars, implying that amino acid composition and its environment are important in protein rubber behavior. Here, gelatin, the hydrolysis product of animal collagen, is hydrated or “plasticized” with water, ethylene glycol, glycerol, corn syrup, and aqueous solutions of sorbitol, glucose, and fructose. The rubber formed is “dry”, that is, is not fully immersed in liquid, and has the appearance and feel of a soft rubber band. The mechanical and thermodynamic behavior of each rubber is characterized with low strain dynamic and high strain tensile experiments with good agreement between the two. Plasticized gelatin rubbers are incompressible and follow the neo-Hookean model for rubber elasticity up to moderate extension ratios. Higher molecular weight polyols with more hydrogen bond donors and acceptors create gelatin networks with lower crosslink density. Ethylene glycol–, glycerol-, sorbitol syrup–, and fructose syrup–plasticized gelatin rubbers have similar molecular relaxation mechanisms and are the most efficient rubbers when probed in the rubbery plateau region prior to approaching the glass transition. The other plasticizers have different molecular relaxation mechanisms that detract from the efficiency of energy storage and return that is not related to network formation but perhaps the individual solvation ability of each plasticizer.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47528604","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

PROPERTIES OF AMMONIA-FREE CONCENTRATED NR LATEX PRESERVED WITH N,N′-METHYLENEBISMORPHOLINE N，N′-亚甲基双吗啉保存无氨浓缩NR胶乳的性能

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2023-03-15 DOI: 10.5254/rct.23.76959

Zhao Liguang, G. Hongxing, Yang Guang, Ding Li, Song Yazhong, Li Jianwei, Huang Honghai, Zhao Tao, Liu Weiqiang

{"title":"PROPERTIES OF AMMONIA-FREE CONCENTRATED NR LATEX PRESERVED WITH N,N′-METHYLENEBISMORPHOLINE","authors":"Zhao Liguang, G. Hongxing, Yang Guang, Ding Li, Song Yazhong, Li Jianwei, Huang Honghai, Zhao Tao, Liu Weiqiang","doi":"10.5254/rct.23.76959","DOIUrl":"https://doi.org/10.5254/rct.23.76959","url":null,"abstract":"\u0000 The NR latex (NRL) industry contributes to ammonia pollution, a problem that is difficult to solve. To address this issue, N,N-methylenebismorpholine (MBM) was used to prepare ammonia-free concentrated NRL (CNRL). The effect of MBM on the preservation and properties of CNRL was studied through comparison with high-ammonia (HA) CNRL. Results showed that MBM had an excellent preservation effect on ammonia-free CNRL. When the MBM dosage exceeded 0.35%, the volatile fatty acid value of CNRL was relatively stable and was consistently less than 0.06 over 180 days of storage. The prepared ammonia-free CNRL had lower viscosity and pH, and its mechanical stability test (MST) was moderate. The control results of the stabilization system showed that sodium dodecyl sulfate can significantly reduce the viscosity and improve the MST of the ammonia-free CNRL. KOH can significantly improve the pH and thermal stability of latex, but has little effect on improving MST. The ammonia-free CNRL had a lower pH after prevulcanization, but higher MST than the HA latex. The viscosity of the ammonia-free prevulcanized latex increased rapidly. The physico-mechanical properties of the vulcanizate films were slightly different from those of the HA latex samples. In addition, the infrared spectrum of the ammonia-free CNRL dry film was basically consistent with that of HA latex dry film. The thermal degradation curve and characteristic temperature of the ammonia-free CNRL dry film were basically the same as those of the HA-preserved film. Biosafety tests showed that the cytotoxicity of the MBM-preserved, ammonia-free CNRL dry film was slightly higher than that of the HA latex film. However, both films did not irritate the skin. All of these results illustrate that MBM has an excellent preservation effect on CNRL and the prepared ammonia-free CNRL has good processability, environmental protection, and safety.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43537718","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

DYNAMIC REVERSIBLE NETWORKS AND DEVELOPMENT OF SELF-HEALING RUBBERS: A CRITICAL REVIEW 动态可逆网络和自愈橡胶的发展:综述

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2023-03-08 DOI: 10.5254/rct.23.76967

Subhradeep Mandal, A. Das, E. Euchler, S. Wiessner, G. Heinrich, Jun Sawada, Ryoji Matsui, T. Nagase, T. Tada

{"title":"DYNAMIC REVERSIBLE NETWORKS AND DEVELOPMENT OF SELF-HEALING RUBBERS: A CRITICAL REVIEW","authors":"Subhradeep Mandal, A. Das, E. Euchler, S. Wiessner, G. Heinrich, Jun Sawada, Ryoji Matsui, T. Nagase, T. Tada","doi":"10.5254/rct.23.76967","DOIUrl":"https://doi.org/10.5254/rct.23.76967","url":null,"abstract":"\u0000 An intensive literature search shows that research in the field of self-healing rubbers is still in its infancy. By analyzing the various reviews and reports available, most of the results prove to be complicated; however, a few studies show promising self-healing properties of new elastomers. Most of these materials were prepared by relatively sophisticated chemical syntheses. Many of the studies on self-healing materials also deal with commercial rubbers, but the mechanical performance of these self-healing systems is very poor for practical application, perhaps because self-healing systems are usually prepared with an uncured or pseudo-crosslinked matrix structure. The poor mechanical properties are related to the highly viscous but inelastic nature of the uncured or only partially cured rubber compound. Importantly, most of the studies have been conducted on rubber systems without reinforcing fillers. For filler-reinforced rubber systems, the question is whether the working principle of reversible bonds is applicable. This literature review attempted to compile the current promising self-healing systems, describe their underlying chemical mechanisms, and discuss the self-healing concept from a thermodynamic perspective. In addition, this review is focused on the critical discussion of the principle and origin of self-healing behavior and finally draws conclusions on the applications and opportunities for further developments in this field.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45731454","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

UNDERSTANDING RECOVERED CARBON BLACK 了解回收炭黑

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2023-03-07 DOI: 10.5254/rct.23.76956

C. Norris, A. L. Cerdán, P. ter Haar

引用次数: 1

PREPARATION AND PROPERTIES OF CHLORINATED POLYISOBUTYLENE ELASTOMER BY ONE-STEP POLYMERIZATION 一步聚合法制备氯化聚异丁烯弹性体及其性能

IF 1.5 4区工程技术

Rubber Chemistry and Technology Pub Date : 2023-03-07 DOI: 10.5254/rct.23.77969

Zhaopeng Yu, Z. Zhao, Xuling Wei, Peng-Fei Yan, Ruofan Liu, Y. Jin, Guangbi Gong, Xinghang Xu, Yibo Wu

引用次数: 0