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Effect of silanized silica nanofiller on tack and green strength of selected filled rubbers
Author(s) -
Movahed Saeed Ostad,
Ansarifar Ali,
Song Mo
Publication year - 2009
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.2554
Subject(s) - natural rubber , materials science , composite material , filler (materials) , mooney viscosity , polybutadiene , styrene butadiene , precipitated silica , rheology , elastomer , styrene , polymer , copolymer
BACKGROUND: Tack and green strength of filled and gum (unfilled) natural rubber (NR), poly(styrene‐ co ‐butadiene) rubber (SBR), polybutadiene rubber (BR) and (SBR‐BR) blend with different loadings of reinforcement agent, silanized silica nanofiller (Coupsil 8113), were studied and the results compared and discussed. RESULTS: It was found that silica was fully dispersed in rubber matrix after 13 min of mixing. In addition, with some exceptions for NR and (SBR‐BR) blend, filler loading decreased the tack strength of the studied filled rubbers. Green strength and Mooney viscosity increased with filler loading for all studied filled rubbers but with different rates and amounts. The optimum filler loadings for NR and (SBR‐BR) filled blend were 30 and 10 phr, respectively. Tacks of NR filled rubbers were much higher than those of synthetic filled rubbers. CONCLUSION: It was concluded that filler loading alters substantially the tack and green strength of the rubbers under investigation. Copyright © 2009 Society of Chemical Industry