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Previous issue date: 2015-01-20 / The development of new materials with distinct properties is needed today; nanocomposites represent a new group of materials that stand out in this current market demand. Polyurethanes for having versatility as the processes of synthesis and composition are an object of study in various industrial segments. One method to improve the properties of the polyurethane is the addition of inorganic fillers. Thus, this work aims to study the interaction and incorporation of silico-metallic mineral synthetic particles with different hydrothermal treatments (7h and 24h), comparing the influence of the size, distribution and surface area on the properties of polyurethane nanocomposites. PU nanocomposite / SSMMP (7h and 24h) with defined amounts of 0.5%, 1%, 2%, 3% and 5% by weight relative to the pure polymer were synthesized. Technical Analysis of X-Ray Diffraction (XRD) Analysis of Specific Surface Area (BET) spectroscopy, Fourier Transform Infrared (FTIR), Differential Scanning Calorimetry (DSC), Thermogravimetric analysis (TGA), Gel Permeation Chromatography (GPC), Dynamic-Mechanical Analysis (DMTA) and Scanning Electron Microscopy (SEM) were used to characterize materials. The XRD analysis showed that the synthetic silico-metallic mineral fillers exfoliated/well dispersed in the polyurethane matrix. The high surface area of SSMMP influenced the crystallization, and also on the thermal and mechanical properties of nanocomposites. Both PU/ SSMMP (7h and 24h) showed an increase in mechanical properties, although the PU/ SSMMP 7h nanocomposites have a Young's modulus higher than PU / SSMMP 24h. The creep- recovery tests showed that the SSMMP (7h and 24h) restricted the movement of PU chains. The results showed the importance of controlled synthesis of SSMMP for obtaining new materials with desired properties / O desenvolvimento de novos materiais com propriedades distintas se faz necess?rio nos dias atuais e os nanocomp?sitos polim?ricos se destacam nesta demanda do mercado. Os poliuretanos, por terem uma versatilidade quanto a processos de s?ntese e composi??o, s?o objeto de estudo em diversos segmentos industriais. Um dos m?todos para melhorar as propriedades do poliuretano ? a adi??o de cargas inorg?nicas. Neste trabalho foram estudadas a intera??o e incorpora??o de part?culas minerais silico-met?licas sint?ticas com diferentes tratamentos hidrot?rmicos (7h e 24h) na matriz polim?rica, comparando a influ?ncia do tamanho, distribui??o e ?rea superficial nas propriedades dos nanocomp?sitos de poliuretano. Foram sintetizados nanocomp?sitos PU/SSMMP (7h e 24h) com quantidades definidas de 0,5%, 1%, 2%, 3% e 5% em rela??o ? massa do pol?mero puro. Para a caracteriza??o dos materiais foram utilizadas as t?cnicas de An?lise de Difra??o de Raios-X (DRX), An?lise da ?rea Superficial Espec?fica (BET), Espectroscopia de Infravermelho por Transformada de Fourier (FTIR), Calorimetria Explorat?ria Diferencial (DSC), An?lise Termogravim?trica (TGA), Cromatografia de Permea??o em Gel (GPC), An?lise Din?mico-Mec?nica (DMTA) e Microscopia Eletr?nica de Varredura (MEV). As an?lises de DRX indicaram que as cargas minerais silico-met?licas esfoliaram/dispersaram na matriz de poliuretano. As altas ?reas superficiais dos SSMMP tiveram influ?ncia sobre a cristaliza??o, e tamb?m nas propriedades t?rmicas e mec?nicas dos nanocomp?sitos. Ambos PU/SSMMP(7h e 24h) apresentaram um aumento nas propriedades mec?nicas, apesar de os nanocomp?sitos PU/SSMMP 7h apresentarem um M?dulo de Young maior que os PU/SSMMP 24h. Os testes de creep-recovery mostraram que os SSMMP (7h e 24h) restringem o movimento das cadeias do PU. Os resultados mostraram a import?ncia da s?ntese controlada dos SSMMP para a obten??o de novos materiais com propriedades desejadas
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/3274 |
| Date | 20 January 2015 |
| Creators | Dias, Guilherme Thomas Gerevini |
| Contributors | Einloft, Sandra Mara Oliveira |
| Publisher | Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Programa de P?s-Gradua??o em Engenharia e Tecnologia de Materiais, PUCRS, BR, Faculdade de Engenharia |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da PUC_RS, instname:Pontifícia Universidade Católica do Rio Grande do Sul, instacron:PUC_RS |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | -7432719344215120122, 500, 600, -655770572761439785 |
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