Chemorheological study of compatibilized blends of low-density polyethylene and polydimethyl siloxane rubber

Authors

  • R. N. Jana,

    Corresponding author
    1. Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721 302, India
    Current affiliation:
    1. Haldia Petrochemicals Limited, P.B. No. 12, IOP (SCR), Durgachak 721602, W.B., India
    • Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721 302, India
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  • G. B. Nando

    1. Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721 302, India
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Abstract

Compatibilization of the blends of polydimethyl siloxane (PDMS) rubber and low-density polyethylene (LDPE) was achieved through reactive processing during extrusion in a Monsanto Processability Tester (MPT). The chemorheological characteristics of 50 : 50 LDPE : PDMS blends with varying proportions (0–8 wt %) of ethylene comethyl acrylate (EMA) were investigated at three different temperatures (170, 190, and 210°C) and four different shear rates (61.3, 122.6, 306.6, and 613.1 s−1). It was found that EMA reacts with vinyl groups of PDMS rubber at a temperature of 190°C during extrusion through the capillary of MPT, forming EMA-grafted-PDMS rubber (EMA-g-PDMS), which acts as the compatibilizer for the blend systems. The results are based on IR spectroscopy, melt rheology, and phase morphology of the blends. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 12: 2810–2817, 2003

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