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Synthesis and characterization of organic-inorganic hybrid clay filled and bismaleimide—siloxane modified epoxy nanocomposites

  • Research Article
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International Journal of Plastics Technology

Abstract

Organic-inorganic hybrids involving organo-modified montmorillonite (OMMT) clay and tetraglycidyl diamino diphenyl methane epoxy (TGDDM) were prepared via in situ polymerization by the homogeneous dispersion of various percentages (1–5% w/w) of clay in epoxy matrix resin. The resulting homogeneous epoxy—clay hybrids were modified with 10 wt% of hydroxyl terminated polydiemthyl siloxane (HTPDMS) using γ—aminopropyltriethoxysilane (γ-APS) as coupling agent in the presence of tin catalyst. The siliconized epoxy-clay prepolymers were further modified separately with 15 wt% of bismaleimide (BMI) monomers and cured with diaminodiphenylmethane. The reactions involved during the curing process between epoxy resin, siloxane and BMI were confirmed by using FTIR and DSC curing analysis. The differential scanning calorimetry (DSC) show that the significant increase in glass transition temperatures in the clay filled hybrid epoxy systems than that of neat epoxy resin. The data obtained from thermal studies indicates that the appreciable improvement in hybrid systems was due to the incorporation of MMT clay, BMI and siloxane into epoxy systems. Scanning electron microscopy (SEM) of the hybrid systems show that the homogenous morphology. X-ray diffraction analysis of the clay hybrid systems shows that the amorphous diffraction patterns and the peaks are broadened and nearly disappeared after 24 h swelling, suggesting the formation of exfoliated structure.

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Acknowledgement

The authors thank the Department of Science and Technology (DST), New Delhi-110 016 for financial support (Ref. No. SR/S3/ME/ 21/2002).

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Authors and Affiliations

  1. Department of Chemical Engineering, Anna University, Chennai, 600 025, India

    Selvaganapathi Anbazhagan, Muthukaruppan Alagar & Periyannan Gnanasundaram

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  1. Selvaganapathi Anbazhagan
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  2. Muthukaruppan Alagar
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  3. Periyannan Gnanasundaram
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Correspondence to Selvaganapathi Anbazhagan or Muthukaruppan Alagar.

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Anbazhagan, S., Alagar, M. & Gnanasundaram, P. Synthesis and characterization of organic-inorganic hybrid clay filled and bismaleimide—siloxane modified epoxy nanocomposites. Int J Plast Technol 15 (Suppl 1), 30–45 (2011). https://doi.org/10.1007/s12588-011-9004-2

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