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Reinforcing effect of nanosilica on the properties of natural rubber/reclaimed ground rubber tire vulcanizates
Author(s) -
De Debapriya,
Panda Prabir Kr.,
Roy Madhusudan,
Bhunia Satyaban,
Jaman Abu Ismail
Publication year - 2013
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.23255
Subject(s) - materials science , natural rubber , thermal stability , composite material , precipitated silica , thermogravimetry , swelling , ultimate tensile strength , sol gel , scanning electron microscope , chemical engineering , nanotechnology , engineering
In this investigation, incorporation of silica into natural rubber (NR)‐reclaim rubber (RR) blend system was carried out by sol‐gel technique at various sol‐gel reaction temperatures. The effect of RR on silica reinforcement, hitherto unexplored, was studied for different NR/RR blend systems. The degree of reinforcement of sol‐gel vulcanizates by equilibrium swelling method indicates that the reinforcing efficiency of the in situ generated silica by sol‐gel technique increases with increasing reclaim rubber content. The reinforcing efficiency, tensile properties and thermal stability of sol gel vulcanizates (SGV) prepared at 50°C become maxima as compared to SGV prepared at 30°C and 70°C. The amount of silica incorporated by sol‐gel technique was determined by thermogravimetry analysis. It indicates that the thermal stability increases with silica content. Attenuated total reflection study indicates that RR forms bond with silica particles due to the presence of active functional site on RR. Scanning electron microscopy studies further indicate the coherency and homogeneity in the silica filled NR/RR vulcanizates. The microwave diagnosis of different SGVs was also carried out and the frequency dependence of dielectric permittivity ( E ') and loss ( E ”) were measured. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers