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Mill Processability of Cis-1,4-polybutadienes and Deformational Characteristics by N. Nakajima; Y. Yamaguchi is a Materials Science article available to read on EtoBox.

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Mill behavior was examined with gum rubbers and carbon black-filled compounds of different types of cis-1,4-polybutadiene. The rubbers were Ti-, Nd-, and Copolymerized polymers. The Co-polymerized rubber contained crystalline particles of 1,2-polybutadiene. The carbon black was 50 phr N330. Photographs of the samples on the mill were taken after milling for 2 min. The mill behaviors were classified according to the four regions of Tokita and White. Behavior at loading, stickiness, and mill shrinkage were evaluated qualitatively to interpret mill behavior with aid of the deformational data of previous publications. The Ti-rubber, containing relatively short branches and exhibiting a strain-softening, was in Region III. The Nd-rubbers, containing relatively long branches and exhibiting a strain-hardening, tended to go to Region IV, because the degree of branching was low. The Co-rubbers containing crystalline particles were in Region II, even though they gave strain-softening since they had a high modulus because of the presence of the particles. An overriding effect on the mill behavior appeared to come from how high the modulus of the gum rubber was at the milling condition. Both t

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Author

N. Nakajima; Y. Yamaguchi

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0021-8995)

Published

1997

Language

EN

Field

Materials Science (Physical Sciences)