Evaluation of the influence of the polymer-filler interaction on compounds based on epoxidized elastomeric matrix and precipitated silica

Abstract

The introduction of epoxy groups into the main chain of elastomers has emerged as a promising alternative, considering the monitoring of polymer-filler interaction leading to changes in the properties of vulcanizates. The epoxidation reaction (in situ) was chosen to modify elastomers, such as polybutadiene (BR) and copolymer of styrene-butadiene-rubber (SBR), because it is a simple, easily controlled reaction, even considering the small epoxidation degree. The modification degree of the polymeric chain was studied with FT-IR and ¹H-NMR. The shift of the Tg to high temperatures with the increase of the epoxy group in the polymer chain was monitored through differential scanning calorimetry (DSC). An analysis of the dynamic modulus of the material in relation to its dependence on the amplitude and temperature was carried out. The interaction between epoxidized elastomeric matrix and silica as filler was extremely improved, even in the presence of very low content of epoxy groups into the polymer chain

Thermodynamically and kinetically favored locations of rice husk ash particles in the phase structure, and the properties of epoxidized natural rubber/thermoplastic polyurethane blends

“…Also, the choice of mixing sequence influences the phase structure and the dispersion of RHA, and hence it played a critical role in controlling the magnitudes of η* and G ′ for the RHA‐filled ENR‐25/TPU blends. Typically, the mobility and relaxation of a polymer molecule decrease with incorporation and dispersion of filler in the polymer matrix . Hence, the η* and G ′ of the filled materials increased due to flow resistance and stronger internal structure limiting molecular relaxation.…”

Efeito do SBS Epoxidado como um Agente Compatibilizante para Obtenção de Nanocompósitos de SBS/Argila Cloisite 10A

“…A Tabela 2 apresenta os valores obtidos dos ensaios de tração. A reação de epoxidação permite a introdução de grupos polares nos polidienos melhorando suas propriedades finais [26,27] , além de aumentar as interações entre os grupos polares da MMT e a matriz de SBS. A introdução da borracha epoxidada na borracha SBS aumentou os valores de tensão em relação à borracha pura (Tabela 2), reduziu seus valores de alongamento devido à introdução dos grupos epoxídicos polares, mantendo sua rigidez.…”

Mixing process influence on thermal and rheological properties of NBR/SiO2 from rice husk ash

“…Furthermore, it is well known that rheological properties can change when fillers are incorporated in a polymer matrix, depending on the kind of filler and the way that it is incorporated. Thus, this knowledge is important to tailor polymer composites with potential applications in numerous technological fields [1][2][3][4][5] . Specifically in the rubber industry, silica is one of the reinforcing fillers widely used in compounds.…”