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Dissertations / Theses on the topic 'Vulcanised Rubber'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Qin, Feng. "Thermocatalytic decomposition of vulcanized rubber." Diss., Texas A&M University, 2005. http://hdl.handle.net/1969.1/4781.

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Used vulcanized rubber tires have caused serious trouble worldwide. Current disposal and recycling methods all have undesirable side effects, and they generally do not produce maximum benefits. A thermocatalytic process using aluminum chloride as the main catalyst was demonstrated previously from 1992 to 1995 in our laboratory to convert used rubber tire to branched and ringed hydrocarbons. Products fell in the range of C4 to C8. Little to no gaseous products or fuel oil hydrocarbons of lower value were present. This project extended the previous experiments to accumulate laboratory data, an

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2

Connors, Sandra André. "Chemical and physical characterization of the degradation of vulcanized natural rubber in the museum environment." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ36018.pdf.

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3

Tulyapitak, Tulyapong. "CURE AND MECHANICAL PROPERTIES OF CARBOXYLATED NITRILE RUBBER (XNBR) VULCANIZED BY ALKALINE EARTH METAL COMPOUNDS." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1158067153.

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4

Dijkhuis, Kuno Alphonsus Johannes. "Recycling of vulcanized EPDM-rubber mechanistic studies into the development of a continuous process using amines as devulcanization aids /." Enschede : University of Twente [Host], 2008. http://doc.utwente.nl/58917.

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5

Poumeyrol, Thomas. "Résonance magnétique nucléaire du soufre-33 : application à la caractérisation des élastomères vulcanisés." Thesis, Orléans, 2013. http://www.theses.fr/2013ORLE2075/document.

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Bien que la vulcanisation soit un procédé de réticulation très répandu dans l’industrie du caoutchouc, les mécanismes réactionnels mis en jeu, la structure du matériau formé, et en particulier les environnements chimiques du soufre restent mal connus. Sonder sélectivement les environnements chimiques du soufre par Résonance Magnétique Nucléaire (RMN) pourrait alors apporter de précieuses informations sur la structure locale du matériau. Cependant, les propriétés intrinsèques du seul isotope du soufre observable par RMN (33S) rendent l’étude de son environnement chimique très délicate et nécess

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6

Taksapattanakul, Korn. "Thermoplastic Vulcanizates Based on Hydrogenated Natural Rubber/Polypropylene Blends." Thesis, Le Mans, 2016. http://www.theses.fr/2016LEMA1028/document.

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La préparation du caoutchouc naturel hydrogéné (HNR) par réaction avec l'hydrazine et le peroxyde d'hydrogène et le latex de caoutchouc naturel a été intéressée. L’influence de conditions de réaction, types et volume de solvants, volume du réactionnel, la quantité d’hydrazine et de peroxyde d’hydrogène sur le degré d’hydrogénation du caoutchouc naturel a été étudiée. Le structure et détermination du degré d’hydrogénation des caoutchoucs naturel hydrogénés a été analysée par résonance magnétique nucléaire (RMN), transformée de fourier infrarouge (FTIR) et spectroscopie Raman. Un degré d'hydrogé

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7

Mani, Skander. "Fundamentals Aspects of Crosslinking Control of PDMS Rubber at High temperatures using TEMPO Nitroxide." Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/27984/27984.pdf.

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Cette thèse présente une contribution originale à la compréhension et la maîtrise des mécanismes physico-chimiques qui contrôlent l’élaboration d’un nouveau matériau polymère biphasique de type Super-TPV (thermoplastique vulcanisé) contenant une phase réticulée par le procédé d’extrusion réactive. La phase caoutchoutique est constituée d’un Vinyl-Polydiméthylsiloxane (vinyl-PDMS) de haute masse molaire (gomme silicone) qui est réticiluée dynamiquement avec une matrice thermoplastique PA12 lors du procédé de mise en œuvre à l’état fondu (T200°C). Le premier des quatre chapitres de ce mémoire e

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8

Partala, Tânia. "Propriedades de concretos produzidos com rejeito particulado de borracha em substituição parcial do agregado miúdo." Universidade do Estado de Santa Catarina, 2009. http://tede.udesc.br/handle/handle/1746.

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Made available in DSpace on 2016-12-08T17:19:33Z (GMT). No. of bitstreams: 1 Pre-textuais.pdf: 51961 bytes, checksum: 92d8926bfc05a6edbc7684111e97a1d1 (MD5) Previous issue date: 2009-11-03<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>This work presents results from an investigation on the potential use of waste vulcanized rubber scrap (WRS) particles as aggregate in construction concretes. The waste rubber scrap used in this study was obtained from the local rubber manufacturing industry. In the preparation of concretes, the Brazilian Standard was followed to achieve the

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9

Rossetti, Lucas de Magalhães May. "Arcabouço estratigráfico da Formação Serra Geral no Vale Principal da Sinclinal de Torres." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/88617.

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A Província Basáltica Continental do Paraná-Etendeka registra o intenso vulcanismo do Cretáceo inferior que precedeu a fragmentação do supercontinente Gondwana. Tradicionalmente investigações sobre estas rochas priorizaram a aquisição de dados geoquímicos e isotópicos, considerando a pilha vulcânica como uma monótona sucessão de derrames tabulares e espessos. O presente trabalho propõe a análise das características físicas deste vulcanismo aplicando conceitos de arquitetura de fácies vulcânicas, integrados a estudos petrográficos e geoquímicos. A Sinclinal de Torres é uma estrutura tectônica l

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10

Cheret-Bitterlin, Estelle. "Etude des mécanismes de la pégosité (tack) de systèmes élastomère / verre." Mulhouse, 1996. http://www.theses.fr/1996MULH0460.

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L'aptitude à coller instantanément, dès leur mise en contact avec des substrats variés, est l'une des qualités premières que doivent présenter les adhésifs dans de nombreux domaines d'application (adhésifs thermofusibles ou sensibles à la pression par exemple). Cependant, cette qualité, communément appelée pégosité (tack en anglais) est difficile à définir d'un point de vue physico-chimique. En effet, elle dépend aussi bien des propriétés de volume que des propriétés de surface des matériaux considérés. La présente étude consiste en une analyse fondamentale des phénomènes influençant l'adhésio

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11

Chen, Zheng-Guo, and 陳正國. "A Study on the Aminolysis Room Temperature Vulcanized Silicone Rubber." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/02105565605251357446.

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12

Cheng, Jeng-Kwo, and 陳正國. "A Study on the Aminolysis Room Temperature Vulcanized Silicone Rubber." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/04186121727435372693.

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碩士<br>淡江大學<br>化學工程學系<br>84<br>Strong base enhanced aminolysis reaction of room temperature vulcanized polydimethylsiloxane network was studied under ambient temperature. It wasfound that time for complete dissolution of PDMS network was affectedby steric effect, the activity of the amine decreased in the order primary >secondary >tertiary. The external diffusion limitation was also found tobe significant, The average molecular weight of the linear polymer productsdecreased while the yi

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13

Wang, Sheng-Huei, and 王勝輝. "A Study on the Alcoholysis of High Temperature Vulcanized Silicone Rubber." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/94758656540364680491.

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碩士<br>淡江大學<br>化學工程學系<br>87<br>The objective of this research is to investigate the reaction factors of alcoholysis of high temperature vulcanized polydimethylsiloxane. The polarity of the reaction system increased with increasing the concentration of EtOH. The diffusivity of the cracking reagents in the siloxane networks was thus reduced, and the dissolution time of silicone rubber increased. It is also found that the rate of dissolution increased with increasing the concentration of KOH and the reaction temperature. As solvents of various polarities, THF or toluene, were employed as the c

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14

Hwang, Shinn-Yeou, and 黃信友. "A Study on the Alcoholysis of Room Temperature Vulcanized Silicone Rubber." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/34248414795139972777.

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碩士<br>淡江大學<br>化學工程學系<br>87<br>Strong base enhanced alcoholysis reaction of room temperature vulcanized polydimethylsiloxane network was studied under ambient temperature. Experimental results showed that the time for complete dissolution of PDMS network was affected by concentrations of KOH and EtOH, and reaction temperature. Time for complete dissolution of PDMS network decreased with increasing concentration of KOH and leveled off to a constant value if the concentration of KOH was greater than 0.25M. EtOH concentration at 3.5M was the optimal reaction condition. The steric effect

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15

Huang, Kao-Cheng, and 黃國徵. "The Mechanism of the Alcoholysis of High Temperature Vulcanized Silicone Rubber." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/56309764068050450655.

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碩士<br>淡江大學<br>化學工程學系<br>85<br>The objective of this reserch was to investigate the reaction mechanism of alcoholysis of HTV silicone rubber. Careful examination of the strong base enhanced alcoholysis of model compound revealed that the gas product was ethylene as was identified by GC- MASS analysis and the liquid products were PDMS terminated by -OMe and -OEt groups as were confirmed by 1H-NMR analysis. This result indicated a mechanism of alcoh

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16

Chou, Chia-Chi, and 仇家琪. "A study on the Acid-Catalyzed Alcoholysis of Room Temperature Vulcanized Silicone Rubber." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/04605744531933269601.

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碩士<br>淡江大學<br>化學工程學系<br>90<br>Sulphuric acid enhanced alcoholysis reaction of room temperature vulcanized polydimethylsiloxane networks was investigated using different kinds of alcohols as nucleophilic reagents in this research. The effects of the reaction temperature and the concentrations of acid and alcohols on the reaction rate were studied, and the reaction parameters were evaluated. Experimental results showed that the dissolution rate of silicone rubber was affected by the steric effect in the alcoholysis reaction, and decreased in the order：methanol > ethanol > 1-propanol >

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17

Lin, Yi-Min, and 林儀旻. "A Study on the Mechanism of Acid-Catalyzed Ethanolysis of Room Temperature Vulcanized Silicone Rubber." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/98201719059470549069.

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碩士<br>淡江大學<br>化學工程學系<br>88<br>Acid catalysts enhanced ethanolysis reaction of room temperature vulcanized polydimethylsiloxane network was studied with the aid of a model compound. Tetrakis(trimethylsiloxy)-silane (M4Q) was chosen as a model compound for the PDMS network. Experimental results showed that the rate of disappearance of M4Q was affected by concentrations of acid and ethanol, and also reaction temperature. The rate of disappearance of M4Q decreased with increasing concentration of acid and ethanol. The reaction rate was enhanced by increasing the reaction temperature.

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18

"Evaluation of Room Temperature Vulcanized (RTV) Silicone Rubber Coated Porcelain Post Insulators under Contaminated Conditions." Master's thesis, 2013. http://hdl.handle.net/2286/R.I.17904.

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abstract: This thesis concerns the flashover issue of the substation insulators operating in a polluted environment. The outdoor insulation equipment used in the power delivery infrastructure encounter different types of pollutants due to varied environmental conditions. Various methods have been developed by manufacturers and researchers to mitigate the flashover problem. The application of Room Temperature Vulcanized (RTV) silicone rubber is one such favorable method as it can be applied over the already installed units. Field experience has already showed that the RTV silicone rubber coated

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19

Chung, Wen-Long, and 莊文龍. "A Study on Catalytic Cracking Reaction of Room Temperature Vulcanized Silicone Rubber by Potassium Hydroxide." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/81408308230216747786.

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碩士<br>淡江大學<br>化學工程學系<br>84<br>RTV silicone rubber was cracked down to siloxane oligomers using strong baseas a catalyst. Environmental impact and the cost of silicone can be reduced if applications of the recoved product are feasible. Using silicone oil as a solvent, silicone rubber could be readily cracked by the action of potassium hydroxide at elevated temperatures. Filler residues were removed from the cracted mixture by distillation under vacuum. The distillate was composed of D4,D5 a

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20

Chakraborty, Rahul. "Studies on Silicone Rubber Insulators used for High Voltage Transmission." Thesis, 2017. http://etd.iisc.ac.in/handle/2005/3981.

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Recently high temperature vulcanized (HTV) silicone rubber (SIR) / polymeric/composite insulators are gaining wider acceptance as overhead transmission line insulators for extra high voltage (EHV) and ultra-high voltage (UHV) systems due to some promising features like hydrophobicity recovery, light weight, ease of handling and installation, better pollution ashover performance, admirable resistance against vandalism etc. Since polymeric insula-tors are of recent origin, their long-term eld performance is yet to be understood. Owing to their organic nature, and exposure to environmental stress

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21

Chakraborty, Rahul. "Studies on Silicone Rubber Insulators used for High Voltage Transmission." Thesis, 2017. http://etd.iisc.ernet.in/2005/3981.

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Recently high temperature vulcanized (HTV) silicone rubber (SIR) / polymeric/composite insulators are gaining wider acceptance as overhead transmission line insulators for extra high voltage (EHV) and ultra-high voltage (UHV) systems due to some promising features like hydrophobicity recovery, light weight, ease of handling and installation, better pollution ashover performance, admirable resistance against vandalism etc. Since polymeric insula-tors are of recent origin, their long-term eld performance is yet to be understood. Owing to their organic nature, and exposure to environmental stress

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