Synthesis & Characterization of Modified Epoxy Resins and Novel E-Glass/ Spectra Reinforced Composites

This work involves the development of a novel siliconized epoxy interpenetrating system using DGEBA LY556 epoxy resin  as base, hydroxylterminated polydimethylsiloxane (HTPDMS) as modifier,γ-aminopropyltriethoxysilane (γ-APS) as crosslinking agent and dibutyltindilaurate (DBTDL) as catalyst. Triethylenetetramine (TETA) was used as curing agent for the above system. Electrical resistant glass (E-glass) and Spectra ultra high molecular weight polyethylene (UHMWPE) reinforced composites are fabricated by hand-lay-up technique using siliconized epoxy matrix systems. The effect of the percentage of siloxanes and the two fibers on the thermal and morphological characteristics of the siliconized epoxy polymer composites are studied using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC). From the study, it is observed that the thermal stability of epoxy systems is enhanced when siloxane is incorporated to them. Morphological studies show that E-glass fiber reinforcement has better intermolecular adhesion to epoxy resin than Spectra reinforcement due to the presence of ionic sites.

[1]  M. Lavorgna,et al.  Silanization and silica enrichment of multiwalled carbon nanotubes: Synergistic effects on the thermal-mechanical properties of epoxy nanocomposites , 2013 .

[2]  H. Galina,et al.  Epoxy resins modified with reactive low molecular weight siloxanes , 2012 .

[3]  Prashant Gupta,et al.  Development of Siliconized Epoxy Resins and Their Application as Anticorrosive Coatings , 2011 .

[4]  N. Martín.  Encyclopedia of Polymer Science and Technology , 2007 .

[5]  Sharif Ahmad,et al.  Synthesis, characterization and development of high performance siloxane-modified epoxy paints , 2005 .

[6]  W. Fortuniak,et al.  Synthesis of Branched Polysiloxanes with Controlled Branching and Functionalization by Anionic Ring-Opening Polymerization , 2003 .

[7]  T. narayanan,et al.  Thermal properties of siliconized epoxy interpenetrating coatings , 2002 .

[8]  M. Alagar,et al.  Development and characterisation of vinyloxyaminosilane grafted ethylene-propylene-diene terpolymer (EPDM-g-VOS) for engineering applications , 2002 .

[9]  Chun-Shan Wang,et al.  Effect of the organophosphate structure on the physical and flame‐retardant properties of an epoxy resin , 2002 .

[10]  M. Alagar,et al.  Studies on thermal and morphological characteristics of E-glass/Kevlar 49 reinforced siliconized epoxy composites , 2000 .

[11]  T. V. Thanikai Velan,et al.  Aliphatic amine cured PDMS-epoxy interpenetrating network system for high performance engineering applications—Development and characterization , 2000 .

[12]  J. Fournier,et al.  Changes in molecular dynamics during bulk polymerization of an epoxide-amine system as studied by dielectric relaxation spectroscopy , 1996 .

[13]  Steve K. Huang,et al.  Preparation and structural determination of siloxane-modified sulfone-containing epoxy resins , 1996 .

[14]  Jung-Chieh Chen,et al.  Polyurethane-modified epoxy resin and their polymer particle filled epoxies , 1996 .

[15]  M. Tomoi,et al.  Effect of cross-link density on modification of epoxy resins by N-phenylmaleimide-styrene copolymers , 1993 .

[16]  O. Howarth,et al.  Structural and materials properties of a polysulphide-modified epoxide resin , 1992 .

[17]  R. Bauer.  Epoxy Resin Chemistry II , 1983 .