Nihon Reoroji Gakkaishi最新文献

{"title":"Modeling Techniques for the Rheology of Wormlike Micellar Solutions","authors":"Takeshi Sato","doi":"10.1678/rheology.50.9","DOIUrl":"https://doi.org/10.1678/rheology.50.9","url":null,"abstract":"","PeriodicalId":19282,"journal":{"name":"Nihon Reoroji Gakkaishi","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48085625","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}

{"title":"Estimation of Red Cell Filterability Using Two-Step Nickel Mesh Filtration System: A Feasibility Study of Tandem Filtration","authors":"Panayiotis D. Megaloikonomos, M. Hieda, T. Koyama, T. Kawa, T. Fujino","doi":"10.1678/rheology.50.119","DOIUrl":"https://doi.org/10.1678/rheology.50.119","url":null,"abstract":"","PeriodicalId":19282,"journal":{"name":"Nihon Reoroji Gakkaishi","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46001616","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}

{"title":"Effect of Curing Process on Glass Transition Temperature of Epoxy Resins","authors":"Mika Aoki","doi":"10.1678/rheology.50.83","DOIUrl":"https://doi.org/10.1678/rheology.50.83","url":null,"abstract":"Epoxy resins are an important class of thermoset resins, which are obtained by curing reactions between an epoxy compound and a curing agent. The reaction leads to the formation of a complicated three-dimensional network that extends through the entire system. Thus, as the condition of the curing reaction changes, the resultant network structure does, generally resulting in the change in the bulk glass transition temperature (Tg) of the resultant resin. In this short review, we briefly summarize how the curing condition affects the formation of the network structure and thereby alters the bulk Tg.","PeriodicalId":19282,"journal":{"name":"Nihon Reoroji Gakkaishi","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45770438","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}

{"title":"An Estimation of Dynamic Properties of Viscoelastic Materials via Inverse Analysis on Inertial Micro Cavitation","authors":"T. Sumi, T. Hashimoto","doi":"10.1678/rheology.50.137","DOIUrl":"https://doi.org/10.1678/rheology.50.137","url":null,"abstract":"","PeriodicalId":19282,"journal":{"name":"Nihon Reoroji Gakkaishi","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67481325","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}

{"title":"Synthesis of Organogelators: Pyromellitamides (PMDA-R) and Their Rheological Properties during Commercial Scale-Up","authors":"Aya Kaide, Takashi Saeki","doi":"10.1678/rheology.49.319","DOIUrl":"https://doi.org/10.1678/rheology.49.319","url":null,"abstract":"In this study, we synthesized low molecular weight organogelators, pyromellitamides (PMDA-R) and investigated the effect of product composition on their viscosity-increasing ability, focusing on the differences between synthetic conditions and those used when scaling up production. We regarded PMDA-2C 8 /oleyl as a target material and synthesized the compound in both a 50 mL flask and a 1 L flask as laboratory-level syntheses. The effects of both temperature and stirring conditions on the composition and performance of the synthesized organogelators were evaluated by the steady flow characteristics and by the viscoelasticity of the solutions dissolved in isododecane. The experimental results showed that increasing the reaction temperature to shorten the reaction time resulted in significant differences in product composition. Although the rheological properties of the solutions showed similar trends in some cases, morphological observation by transmission electron microscopy (TEM) revealed that the self-organizing structures formed by the different compositions were com-pletely different from each other. Synthesis was also carried out in a commercial-scale reactor. This study provided useful information for ‘process intensification’ by focusing on changes in products during scale-up.","PeriodicalId":19282,"journal":{"name":"Nihon Reoroji Gakkaishi","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44362875","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}

{"title":"Effect of Molar Concentration Ratio on the Flow Properties of Rod-Like Micellar Solutions Passing through Small Orifices","authors":"A. Ushida, Terumitsu Sugiyama, Taisuke Sato, Ryuichi Kayaba, T. Narumi, T. Hasegawa","doi":"10.1678/rheology.49.303","DOIUrl":"https://doi.org/10.1678/rheology.49.303","url":null,"abstract":"The flow properties of rod-like micellar (surfactant) solutions passing through circular orifices with an inner diameter of 100 µm to 1.0 mm were investigated in this study. Rod-like micellar solutions comprising a cationic surfactant [oleyl bis(2-hydroxyethyl)methylammonium chloride; Lipothoquad O/12] and a counterion (sodium salicylate; NaSal) were used. The molar concentration ratio was varied from 0.10 to 100 to change the rheological properties of the test fluid, which were evaluated using a strain-controlled rheometer and a capillary viscometer. All the rod-like micellar solutions exhibited non-Newtonian viscosity except those with molar concentration ratios of 0.10 and 0.15, which instead exhibited Newtonian viscosity consistent with that of water. In the dynamic viscoelasticity measurements, the relaxation times of the rod-like micellar solutions with molar concentration ratios other than 0.10, 0.15, and 100 were calculated by extrapolating slopes 1 and 2. For each orifice, the experimental results with water alone agreed with theoretical predictions within the experimental errors (thereby demonstrating the validity of the experimental setup). In dimensionless graphs arranged by generalized Reynolds number, the dimensionless pressure drops for the molar concentration ratios of 0.10, 0.15, 50, and 100 agreed well with the experimental (predicted) values for water. For the other rod-like-micellar solutions, the dimensionless pressure drop was larger than that for water. In other words, the rheological and flow properties were found to change with the molar concentration ratio. To discuss the experimental results in depth, the flow resistivity was calculated and was largest for the molar concentration ratio of 1.0. The increase in pressure drop was also largest for molar concentration ratio of 1.0. The Weissenberg number was used to summarize the experimental results in terms of elastic properties, and the characteristic increase in pressure drop was found to occur at a Weissenberg number on the order of 10 0 , at which elasticity was strongly expressed.","PeriodicalId":19282,"journal":{"name":"Nihon Reoroji Gakkaishi","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46154025","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}

{"title":"New Progress of Rheology in Industrial Field, Contribution to Development and Enlightenment in Psychorheology","authors":"Y. Nabata","doi":"10.1678/rheology.49.279","DOIUrl":"https://doi.org/10.1678/rheology.49.279","url":null,"abstract":"We have tried to measure purely mechanical sensory feelings of cosmetics with using commercial rheometers. To ob-tain mechanical parameters relating to the score of sensory feeling, we have to measure under the same condition during the evaluation of sensory feeling, that is, the movement of finger and the structure of cosmetics. Sensory feelings of made-up skin can also be measured using stress-controled rotaional rheometers if we fix a measuring part of human body without stress. Understanding the rheological properties of cosmetic emulsions is helpful to design a new product with a desired sensory feeling. Emulsions with high dispersoid concentration have yield point, but high concentration linear polymer solution dose not. This was qualitatively explained with the difference in mobility at the contact point between dispersoids.","PeriodicalId":19282,"journal":{"name":"Nihon Reoroji Gakkaishi","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41489209","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}

{"title":"Mechanical and Fracture Properties of Dynamically Cross-Linked Polymeric Materials","authors":"K. Mayumi","doi":"10.1678/rheology.49.295","DOIUrl":"https://doi.org/10.1678/rheology.49.295","url":null,"abstract":"","PeriodicalId":19282,"journal":{"name":"Nihon Reoroji Gakkaishi","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45763666","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}

{"title":"Dilute Solution and Fine Particle Dispersion Rheologies Applied to Efficient Thermal Energy Transportation","authors":"Hiroshi Suzuki","doi":"10.1678/rheology.49.287","DOIUrl":"https://doi.org/10.1678/rheology.49.287","url":null,"abstract":"","PeriodicalId":19282,"journal":{"name":"Nihon Reoroji Gakkaishi","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47539526","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}

{"title":"Radial Distribution Functions of Entanglements in Primitive Chain Network Simulations","authors":"Yuichi Masubuchi, Takumitsu Kida, Y. Doi, Takashi Uneyama","doi":"10.1678/rheology.49.337","DOIUrl":"https://doi.org/10.1678/rheology.49.337","url":null,"abstract":"Although the entanglement network among polymers has been widely investigated, the spatial distribution of entanglement nodes has been rarely discussed. In this study, we obtained the radial distribution functions (RDFs) for the entanglement nodes from the snapshots of multi-chain slip-link simulations. The model employed in this study is the primitive chain network (PCN) model, which has been validated to reproduce the entangled polymer dynamics semi-quantitatively. The statistics of captured entanglement networks were compared to those reported for the primitive path network extracted by the CReTA procedure from the full-atomistic molecular model of a polyethylene melt. In the range of distance longer than the average strand length, the network structure from PCN does not show any structural correlation, and the in-tra-chain correlation is close to that for Gaussian chains with non-interacting slip-links. These features are consistent with the CReTA network and the conventional assumptions made for single-chain models. Meanwhile, in the short-range, the structural correlation in PCN is much weaker than that in CReTA. This discrepancy is because the short-range structure in PCN is realized as a result of imposed fluctuations, whereas it is determined by the minimization of the primitive path in CReTA.","PeriodicalId":19282,"journal":{"name":"Nihon Reoroji Gakkaishi","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42745330","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}