NMR study of styrene-butadiene rubber (SBR) and TiO2 nanocomposites

Obtenção de nanocompósito de EVA/sílica e caracterização por ressonância magnética nuclear no estado sólido

“…Logo o estudo por RMN desses materiais deve ser realizado no estado sólido [15][16][17][18][19][20][21][22][23] . Para o estudo de materiais sólidos, a determinação dos tempos de relaxação spin-rede, com constante de tempo (T 1 H) e spin-rede no eixo rotatório, com constante de tempo T 1ρ H, especialmente este último propiciam a geração de informação pormenorizada sobre a relação da nanoestrutura (morfologia)/propriedades dos materiais híbridos, o que faz com que o uso da RMN no sólido seja bastante atrativo para o estudo e entendimento do comportamento da nanoestrutura em nanocompósitos poliméricos, visto que os tempos de relaxação geram respostas em nível molecular [15,[23][24][25][26][27][28][29][30][31][32][33][34][35] . …”

Inorganic-organic hybrids based on poly (ε-Caprolactone) and silica oxide and characterization by relaxometry applying low-field NMR

“…Generally speaking, for well dispersed hybrids, just one value of this parameter is found. More than one value is an indication that at least two domains with distinct motilities are present due to the formation of non-homogeneous material 34,35 . Hybrid materials are essentially heterogeneous due to their initial components being organic-inorganic.…”

Nanocomposites of NR/SBR Blend Prepared by Latex Casting Method: Effects of Nano-TiO2 and Polystyrene-Encapsulated Nano-TiO2 on the Cure Characteristics, Physical Properties, and Morphology

“…High-performance elastomeric materials have been produced by developing multicomponent systems in terms of rubber blend and/or rubber nanocomposites [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Blending of rubbers is an important technique to improve certain properties not inherent in a single rubber, while incorporating an inorganic nanofiller (nanosized filler) even at a very low loading (less than 10 wt%) into rubber matrix by physical mixing has attracted considerable interest for both scientific challenges and industrial applications due to their high-performance properties [2,[4][5][6][7][8][9][11][12][13][14][15][16].…”

“…Blending of rubbers is an important technique to improve certain properties not inherent in a single rubber, while incorporating an inorganic nanofiller (nanosized filler) even at a very low loading (less than 10 wt%) into rubber matrix by physical mixing has attracted considerable interest for both scientific challenges and industrial applications due to their high-performance properties [2,[4][5][6][7][8][9][11][12][13][14][15][16]. Natural rubber (NR) is one of the most important natural biosynthesis polymers, according to its high elasticity, resilience and mechanical properties, low heat build-up and cost, and good formability [1,[4][5][6][7][8][9].…”