Estudo estatistico de parametros do processamento de borracha SBR para banda de rodagem de pneumaticos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

In the present work, the processing of styrene-butadiene rubber was studied. The studies were on the material for the part of tire in contact with the ground. The rubber components mixing in a banbury type internal mixer, and material vulcanization in a heated press, were studied by factorial design method. The influence of rotation speed, inner pressure and mixing time in the banbury were investigated in order to obtain a maximum in carbon black dispersion. A 95.5% carbon black dispersion was attained in the banbury, when mixing the material for 06:00 minutes, at 30 rpm, with 3 Kgf/cm2 of inner pressure. In the vulcanization assays, the influence of heating time and temperature over hardness, abrasion, resilience and tensile properties were evaluated. Mathematical models for vulcanization process were obtained by surface response method. Statistical models were fit for strength at rupture, deformation at rupture and tearing strength as function of heating time and temperature in vulcanization. Statements were made on optimal processing conditions from these models

ASSUNTO(S)

ciencias dos materiais atomoveis - pneus borracha materiais

ACESSO AO ARTIGO

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