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Journal of the Society of Rubber Industry,Japan最新文献

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Study on Applications of Related Substance of Fullerenes Preparation and Properties of Related Substance of Fullerenes / SBS composites 富勒烯相关物质制备的应用及富勒烯/ SBS复合材料相关物质性能研究
Journal of the Society of Rubber Industry,Japan Pub Date : 2009-12-01 DOI: 10.2324/GOMU.82.400
Takahide Kumagai, E. Yamada, S. Inagaki, Tsuyoshi Takakura, K. Sone
{"title":"Study on Applications of Related Substance of Fullerenes Preparation and Properties of Related Substance of Fullerenes / SBS composites","authors":"Takahide Kumagai, E. Yamada, S. Inagaki, Tsuyoshi Takakura, K. Sone","doi":"10.2324/GOMU.82.400","DOIUrl":"https://doi.org/10.2324/GOMU.82.400","url":null,"abstract":"Fullerenes are the carbon materials that only 60 or more carbon atoms are covalently bounded. Since such greatly unique materials were discovered, many researches of fullerenes have been carried out. On the other hand, the unique carbon soot (CS) is yielded at production of fullerene, but it is not really investigated. However, we think that the application of CS is extremely important from the perspective of fullerene research and of market expansion. In this study, we prepared the composites by adding CS to styrene block copolymer (SBC), and then investigated the additional effect by measuring dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC) and tensile properties. It was found that tensile modulus and heat-aging resistance of the SBC improved by adding CS.","PeriodicalId":405949,"journal":{"name":"Journal of the Society of Rubber Industry,Japan","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115061739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Physicochemical Characterization of Biodegradable Segmented Polyurethanes and Their Blends with Polylactide 可生物降解的分段聚氨酯及其与聚乳酸共混物的理化性质
Journal of the Society of Rubber Industry,Japan Pub Date : 2009-11-01 DOI: 10.2324/GOMU.82.349
T. Shirahase, Michiko Hadano, H. Otsuka, A. Takahara
{"title":"Physicochemical Characterization of Biodegradable Segmented Polyurethanes and Their Blends with Polylactide","authors":"T. Shirahase, Michiko Hadano, H. Otsuka, A. Takahara","doi":"10.2324/GOMU.82.349","DOIUrl":"https://doi.org/10.2324/GOMU.82.349","url":null,"abstract":"Biodegradable segmented poly(urethane)s (SPUs) and poly(urethane-urea)s (SPUUs) were synthesized by a standard two-step prepolymer method using two kinds of diisocyanates (methyl 2,6-diisocyanatohexanoate (LDI) and 1,4-diisocyanatobutane (BDI)) and polycaprolactone diol (PCL) as a soft segment combined with two kinds of chain extenders (1,3-propanediol (PDO) and 1,4-butanediamine (BDA)) as a hard segment. Thermal analysis by differential scanning calorimetry, wide angle X-ray diffraction (WAXD), and small angle X-ray scattering measurements revealed that different kinds of diisocyanates and chain extenders in SPUU affected the crystallinity of PCL segment and the microphase separation structure consisted of soft and hard segments. Diffraction pattern in WAXD due to the crystallization of PCL components inhibited in the cases of two SPUUs with LDI-BDA and BDI-BDA hard segments. Furthermore, these two kinds of SPUU showed good elastic properties because the crystallization of PCL component was inhibited by the strong aggregation of hard segments. The mechanical properties and degradability of poly(L-lactide) (PLLA)/SPUU blends were also investigated. A toughness of PLLA was enhanced by blending with SPUU. Also, this blend shows degradation owing to the hydrolysis. It was revealed that brittleness of PLLA was improved through blending with biodegradable SPUU without sacrificing degradability.","PeriodicalId":405949,"journal":{"name":"Journal of the Society of Rubber Industry,Japan","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128808020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Biochemistry and Molecular Biology of Natural Rubber 天然橡胶的生物化学和分子生物学
Journal of the Society of Rubber Industry,Japan Pub Date : 2009-10-10 DOI: 10.2324/GOMU.82.424
S. Okumura, Y. Hayashi, N. Kato
{"title":"Biochemistry and Molecular Biology of Natural Rubber","authors":"S. Okumura, Y. Hayashi, N. Kato","doi":"10.2324/GOMU.82.424","DOIUrl":"https://doi.org/10.2324/GOMU.82.424","url":null,"abstract":"Natural rubber is one of the most important polymers produced by plants because it is strategic raw material used in more than 40000 products including the tire. It is focused as carbon neutral industrial material because it is synthesized from atmospheric CO2. Among over 2500 rubber producing plant species, the Para rubber tree (Hevea brasiliensis Muell. Arg.) is presently the only commercial source of natural rubber. There are some unknown points about the detail of natural rubber biosynthesis. The objective of this review is to provide readers with information on the newest trends of the natural rubber and Para rubber tree research from standpoint of biochemistry and molecular biology.","PeriodicalId":405949,"journal":{"name":"Journal of the Society of Rubber Industry,Japan","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114367216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Study on the Stress Softening Effect of Silica Filled Vulcanizates 二氧化硅填充硫化胶的应力软化效果研究
Journal of the Society of Rubber Industry,Japan Pub Date : 2009-09-10 DOI: 10.2324/GOMU.82.394
Y. Naito, Masayoshi Ito
{"title":"Study on the Stress Softening Effect of Silica Filled Vulcanizates","authors":"Y. Naito, Masayoshi Ito","doi":"10.2324/GOMU.82.394","DOIUrl":"https://doi.org/10.2324/GOMU.82.394","url":null,"abstract":"Electron spin resonance measurements under the tensile deformation and transmission electron microscopy observations were carried out for silica filled SBR and polyisoprene vulcanizates to discuss on the mechanism of stress softening effect (Mullins effect).It was found that for unfilled vulcanizates, the breakdown of crosslinks and/or chain scission of rubber molecules are responsible for the Mullins effect. By the incorporation of silica into rubber, the Mullins effect was enhanced possibly due to the partial breakdown of silica agglomerates.","PeriodicalId":405949,"journal":{"name":"Journal of the Society of Rubber Industry,Japan","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130829073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Improvement in Dispersion of MWCNTs into EPDM 改善MWCNTs在EPDM中的分散性能
Journal of the Society of Rubber Industry,Japan Pub Date : 2009-09-01 DOI: 10.2324/GOMU.82.247
H. Iwabuki, T. Noguchi, K. Takeuchi, M. Endo
{"title":"Improvement in Dispersion of MWCNTs into EPDM","authors":"H. Iwabuki, T. Noguchi, K. Takeuchi, M. Endo","doi":"10.2324/GOMU.82.247","DOIUrl":"https://doi.org/10.2324/GOMU.82.247","url":null,"abstract":"In this study, we examined the improvement in dispersion of multi-walled carbon nanotubes (MWCNTs) into ethylene-propylene-diene rubber (EPDM). The dispersion of MWCNTs was observed by an optical microscope and a scanning electron microscope. Normally, MWCNTs were hardly dispersed into non-polar EPDM matrix, and large agglomerates of MWCNTs were observed in the composites. Increase of the mixing time decreased the number of large agglomerates of MWCNTs. At the same mixing time, the higher the milling temperature was, the worse the macro-dispersion of MWCNTs became. However, in order to disperse MWCNTs finely and uniformly, it was effective to raise the mixing temperature.","PeriodicalId":405949,"journal":{"name":"Journal of the Society of Rubber Industry,Japan","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128696398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Recent Trends for Mold Staining and Washing of Stained Mold 模具染色和染色模具清洗的最新趋势
Journal of the Society of Rubber Industry,Japan Pub Date : 2009-07-10 DOI: 10.2324/GOMU.82.308
Koichi Yamaguchi
{"title":"Recent Trends for Mold Staining and Washing of Stained Mold","authors":"Koichi Yamaguchi","doi":"10.2324/GOMU.82.308","DOIUrl":"https://doi.org/10.2324/GOMU.82.308","url":null,"abstract":"Rubber molds are widely used in the rubber industries, and the mold staining has been an important subject for a long time. This review describes the identification of the causes of mold staining, improvement of mold staining, mold releasing agent, and the washing methods of stained mold. Especially, improvements of anti-staining has been intro-duced by means of techniques related to rubber, various compounding ingredients, such as new material in place of zinc oxide, mold materials and the surface treatment of mold, such as coating of ceramics, nano-composite, fluoro resin and modification by ion. It has been confirmed that the suitable surface of stainless mold is obtained with increased flatness and larger contact angle of water. Various washing methods are introduced.","PeriodicalId":405949,"journal":{"name":"Journal of the Society of Rubber Industry,Japan","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132022033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of Thermal Analysis to Weathering of Rubber 热分析在橡胶老化中的应用
Journal of the Society of Rubber Industry,Japan Pub Date : 2009-04-15 DOI: 10.2324/GOMU.82.157
Y. Nishimoto
{"title":"Application of Thermal Analysis to Weathering of Rubber","authors":"Y. Nishimoto","doi":"10.2324/GOMU.82.157","DOIUrl":"https://doi.org/10.2324/GOMU.82.157","url":null,"abstract":"The present review describes the application of thermal analysis to weathering of rubbers and their products. The thermal analytical methods are useful technique in the material and product development. The characteristic change due to degradation is important for the materials and products. The examples of application of thermal analysis to weathering of rubbers and their products are shown.","PeriodicalId":405949,"journal":{"name":"Journal of the Society of Rubber Industry,Japan","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128413129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Living Radical Polymerization 1. Polymerization Mechanism and Methods 1 活性自由基聚合聚合机理与方法
Journal of the Society of Rubber Industry,Japan Pub Date : 2009-03-15 DOI: 10.2324/GOMU.82.135
S. Yamago, Yasuyuki Nakamura
{"title":"Living Radical Polymerization 1. Polymerization Mechanism and Methods 1","authors":"S. Yamago, Yasuyuki Nakamura","doi":"10.2324/GOMU.82.135","DOIUrl":"https://doi.org/10.2324/GOMU.82.135","url":null,"abstract":"Living radical polymerization (LRP) has been becoming an indispensable method for the synthesis of functional polymer materials, because this method possesses attractive features of both radical and living polymerizations. This four-series article describes the methods to carry out LRP and their uses for material synthesis. We shall mainly focused on nitroxide-mediated LRP (NMP), atom transfer radical polymerization (ATRP), reversible addition-fragmentation chain transfer polymerization (RAFT), organotellurium-, stibine-, and bismuthine-mediated LRP (TERP, SBRP, and BIRP, respectively), and cobalt-mediated LRP (CORP). This first article mainly focuses on methods and mechanisms of NMP and ATRP, in which the persistent radical effect plays an important role in the polymerization mechanism.","PeriodicalId":405949,"journal":{"name":"Journal of the Society of Rubber Industry,Japan","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133068033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Development of Cure Bonding between Chlorosulfonyl Polyethylene and Fluoroplastics 氯磺酰聚乙烯与氟塑料固化键合的研究进展
Journal of the Society of Rubber Industry,Japan Pub Date : 2009-03-15 DOI: 10.2324/GOMU.82.117
N. Ito, Hironaka Tsuneo, H. Nakamura, Tamotsu Sato
{"title":"Development of Cure Bonding between Chlorosulfonyl Polyethylene and Fluoroplastics","authors":"N. Ito, Hironaka Tsuneo, H. Nakamura, Tamotsu Sato","doi":"10.2324/GOMU.82.117","DOIUrl":"https://doi.org/10.2324/GOMU.82.117","url":null,"abstract":"The cure bonding between chlorosulfonyl polyethylene (CSM) and fluoroplastic (terpolymer of tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride) has been developed. In the case of cure bonding of chlorinated polyethylene by trithiocyanuric acid (TCA), the difference in accelerator, such as tetra-n-butylphosphonium benzotriazolate and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) salts, did not influence on cure bonding, however, the presence of water was found important to get high bonding strength. Thus the addition of sodium acetate trihydrate that releases water of crystallization during cure bonding significantly improved the bonding strength.For compounds of conventional CSM having 1 wt% of sulfur in the chlorosulfonyl group as a cross-linking site with sodium acetate trihydrate and TCA, their viscosity became too high to be mill mixed and molded, when an accelerator DBU salt such as formate or benzoate having a melting point below milling temperature, 130 °C, was used. DBU salts having melting points above milling temperature, such as trimellitate and pyromellitate, showed poor cure bonding.A compound of CSM having 0.3 wt% of sulfur in the chlorosulfonyl group with TCA, DBU phenolate and sodium acetate trihydrate was able to be mill mixed, molded and cure bonded. The vulcanizate satisfied the specifications of automotive fuel hoses.","PeriodicalId":405949,"journal":{"name":"Journal of the Society of Rubber Industry,Japan","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131537675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Melting Behavior of Nanosize Crystals : Part 1. Thermodynamic Description of Melting Point and Melting Point of Ice 纳米晶体的熔化行为:第1部分。熔点和冰熔点的热力学描述
Journal of the Society of Rubber Industry,Japan Pub Date : 2003-07-15 DOI: 10.2324/GOMU.76.240
M. Todoki, K. Ishikiriyama
{"title":"Melting Behavior of Nanosize Crystals : Part 1. Thermodynamic Description of Melting Point and Melting Point of Ice","authors":"M. Todoki, K. Ishikiriyama","doi":"10.2324/GOMU.76.240","DOIUrl":"https://doi.org/10.2324/GOMU.76.240","url":null,"abstract":"Melting of nanosize crystals of ice and polymer measured with differential scanning calorimeter (DSC) has been reviewed on the research work by the present authors. The whole article was divided into the two parts due to limitations of space. In part 1, melting of nanosize ice has been treated.Firstly the thermodynamic aspect of melting point depression of nanosize crystals was treated briefly. The inversely proportional increase of specific surface area due to the decrease of crystal size was explained to be the origin of the melting point lowering from the equilibrium value.Secondly the melting point of ice formed in water-saturated microporous materials such as silica gels for HPLC use and polymer hydrogel membranes for artificial kidneys revealed the depression from 0°C inherent to its crystal size. This encouraged us to establish a new technique called “Thermoporosimetry” which can measure the pore size distribution (PSD) curve of porous materials thermally. The most advantage of this technique is that it can measure the PSD curve of polymer hydrogel for which the already existing techniques such as gas adsorption method and mercuryporosimetry cannot apply because the prior freeze-drying of the hydrogel samples destroys their nanosize pores.","PeriodicalId":405949,"journal":{"name":"Journal of the Society of Rubber Industry,Japan","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116405747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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