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United States Department of Agriculture

Agricultural Research Service

Title: Viscoelastic Properties of Rubber Composites Reinforced by Soy Spent Flakes and Carbon Black Co-Filler

Author
item Jong, Lei

Submitted to: Proceedings of American Chemical Society National Meeting
Publication Type: Proceedings
Publication Acceptance Date: March 26, 2006
Publication Date: March 26, 2006
Citation: Jong, L. 2006. Viscoelastic properties of rubber composites reinforced by soy spent flakes and carbon black co-filler [abstract]. Proceedings of American Chemical Society National Meeting. 94:459-460.

Technical Abstract: In rubber reinforcement, the filler network structure has a significant effect on rubber modulus. Different preparation methods may produce different filler network structures, and lead to different reinforcement effects. In this study, more insight on the reinforcement mechanism is obtained by comparing different preparation methods - casting versus freeze-drying. Soy spent flakes (SSF) used in this study is mostly a soy carbohydrate fraction in soybeans. Carbon black (CB) is also included as a comparison. SSF and CB are used as fillers to make reinforced rubber composites. Comparison between freeze-drying and the casting method indicates that a filler network related structure in the composites, prepared by the freeze-drying method, is more elastic than that of the casting method, and can be explained by the model of polymer mediated filler network. The shifting of G” maximum in SSF and CB composites with an increased filler concentration indicates CB has a greater extent of filler-rubber interaction. The stress softening effect of SSF and CB composites again indicates the composites prepared by the freeze-drying method have better recovery behavior than that by the casting method due to their more elastic filler network structure. This study shows that the composites prepared by the freeze-drying method have a more elastic filler network structure, which can be explained by the increasing frequency of a thin polymer layer between filler aggregates.

Last Modified: 11/26/2014
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