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Please use this identifier to cite or link to this item: http://purl.org/purl/3635

Title: Covulcanization of elastomer blends with special reference to NR/EPDM blends
Authors: Suma, N
Keywords: Carboxylation pf IIR and EPDM
Precuring of IIR EPDM
Processability of NR/IIR and NR/EPDM blends
Utilisation of IIR tube reclaim for developing NR/IIR vlends
Issue Date: Jul-1992
Publisher: Cochin University of Science And Technology
Abstract: Attempts have been made to attain satisfactory network structures in each of the phases of a rubber blend by minimising the cure rate imbalance by employing methods such as grafting of accelerators to the slow curing rubber, chemically bonding the crosslinking agents to the rubber in which it has lower solubility, functionalisation of the slow curing rubber, masterbatching of the curing agents to the slow curing rubber etc. Functionalisation of the slow curing constituents of NR/IIR and NR/EIPDM blends is tried using novel reagents as the first part of this study. However, the crux of the present study is a more direct approach to attaining a covulcanized state in NR/IIR and NR/EPDM blends: Precuring the slow curing rubber (IIR or EPDM) to a low level when it can still blend with NR and then to ck) the final curing after blending with NR. TNM3 precuring is also likely to minimise the viscosity mismatch. Since a low level of resmmal crosslink density is likely to be present lJ1 reclaimed rubbers, blending heat resistant reclaimed rubber such as butyl reclaim with NR may also have the same effect of precuring IIR, and then blending with NR. Hence use of IIR reclaim for developing blends with NR is also proposed to be investigated in this study
Description: Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology
URI: http://dyuthi.cusat.ac.in/purl/3635
Appears in Collections:Faculty of Technology

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