Influence of Mastication on Properties of Carbon black-Filled NR Compounds

Sung Seen Choi

Korea Polymer Journal, Vol.8, No.2, 73-79, April, 2000

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Influence of Mastication on Properties of Carbon black-Filled NR Compounds

Sung Seen Choi^†

Kumho Research and Development Center, 555 Sochon-dong, kwangsan-gu, Kwangju 506-040, Korea

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The influence of mastication of natural rubber (NR) on properties of carbon black-filled NR compounds was studied. Variations of viscosities of the masticated NR and the carbon black-filled NR compound by heating were also investigated. The viscosities of the compounds decreased by increasing the mastication time of the raw rubber. The viscosities of the masticated NR and the compounds increased by increasing t도 heating time. This was explained by the combination reaction between functional groups in the rubber. the viscosity increment of the masticated rubber and the compounds by heating became larger with increased mastication time. Cure rate of the compound became faster by increasing the mastication time. Modulus of the vulcanizate made of the rubber masticated for a long time was higher than that of the vulcanizate made of the rubber masticated for a short time while elongation of break of the former was shorter than that of the latter. This was explained by the content of bound rubber and chain length of the rubber molecules.

[References]

Imoto M, Rubber Chem. Technol., 25, 234 (1952)
Mullins L, Watson WF, Rubber Chem. Technol., 26, 91 (1953)
Imoto M, Kiriyama S, Rubber Chem. Technol., 28, 808 (1955)
Angier DJ, Chambers WT, Watson WF, Rubber Chem. Technol., 31, 73 (1958)
Imoto M, Kiriyama S, Rubber Chem. Technol., 33, 91 (1960)
Bristow GM, Rubber Chem. Technol., 35, 896 (1962)
Bhatnagar SK, Sanerjee S, Rubber Chem. Technol., 38, 961 (1965)
Fries H, Pandit RR, Rubber Chem. Technol., 55, 309 (1982)
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Jurkowska B, Olkhov YA, Jurkowski B, Olkhova OM, J. Appl. Polym. Sci., 71(5), 729 (1999)
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[Referenced By]

[1] Imoto M, Rubber Chem. Technol., 25, 234 (1952)

[2] Mullins L, Watson WF, Rubber Chem. Technol., 26, 91 (1953)

[3] Imoto M, Kiriyama S, Rubber Chem. Technol., 28, 808 (1955)

[4] Angier DJ, Chambers WT, Watson WF, Rubber Chem. Technol., 31, 73 (1958)

[5] Imoto M, Kiriyama S, Rubber Chem. Technol., 33, 91 (1960)

[6] Bristow GM, Rubber Chem. Technol., 35, 896 (1962)

[7] Bhatnagar SK, Sanerjee S, Rubber Chem. Technol., 38, 961 (1965)

[8] Fries H, Pandit RR, Rubber Chem. Technol., 55, 309 (1982)

[9] Chattaraj PP, Chandra AK, Mukhopadhyay R, Kautsch. Gummi Kunstst., 43, 1071 (1990)

[10] Engels HW, Abele M, Rubber World, 204(5), 14 (1991)

[11] Ahagon A, Rubber Chem. Technol., 69, 742 (1996)

[12] Jurkowska B, Olkhov YA, Jurkowski B, Olkhova OM, J. Appl. Polym. Sci., 71(5), 729 (1999)

[13] White JL, in Science and Technology of Rubber, Academic Press, New York, 1994 (1994)

[14] Kramer O, Good WR, J. Appl. Polym. Sci., 16, 2677 (1972)

[15] Burfield DR, Nature, 249, 29 (1974)

[16] Burfield DR, Gan SN, J. Polym. Sci. A: Polym. Chem., 15, 2721 (1977)