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Filler structure and tensile properties of starch xanthide‐reinforced vulcanizates
Author(s) -
Dennenberg R. J.,
Buchanan R. A.,
Bagley E. B.
Publication year - 1977
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1977.070210113
Subject(s) - materials science , composite material , carbon black , filler (materials) , starch , ultimate tensile strength , particle size , particle (ecology) , natural rubber , elastomer , rheometer , rheology , chemical engineering , chemistry , biochemistry , oceanography , engineering , geology
Stress–strain behavior of some starch xanthide‐ and carbon black‐reinforced styrene–butadiene elastomers was investigated as a function of filler particle size and structure. In starch xanthide systems, low strain behavior is sensitive to particle structure; high strain behavior, to particle size. Electron photomicrographs of the several starch xanthide‐reinforced vulcanizates were analyzed with reference to filler particle size and structure. These parameters were then correlated with Mooney plots of [load/λ − λ −2 ] versus λ −1 , where λ is the strain ratio. Plots of samples containing highly structured filler particles were highly nonlinear, rising steeply as λ −1 approached unity. Samples containing nonstructured filler particles were also highly nonlinear, rising steeply as λ −1 decreased to approximately 0.4. A preliminary study of the dynamic properties of these samples, as determined in an eccentric rotating‐disk rheometer, provided little additional information.