The effect of the structure of an epoxy resin prepared by curing DGEBA with structurally different aromatic amide-amines containing a silicon group in the backbone on the properties of glass fabric reinforced laminates was studied. The laminates were fabricated by coating epoxy compatible woven glass fabric with DGEBA containing stoichiometric amounts of amide-amines synthesized by reacting 1 mol of bis (4-chlorobenzoyl) dimenthylsilane with 2 mol of 4,4'-diaminodiphenyl ether (E)/4,4'-diaminodiphenyl methane (M)/4,4'-diaminodiphenyl sulfone (pS)/3,3'-diaminodiphenyl sulfone (mS)/bis (3-aminophenyl) methyl phosphine oxide (B)/tris (3-amino phenyl) phosphine oxide (T) using dimethyl acetamide as solvent. Interlaminar shear strength (ILSS), flexural strength and flexural modulus of the laminates were in the range of 7-21 MPa, 114-409 MPa and 10-28 GPa respectively. The difference in flexural strength and flexural modulus of the composites can be attributed to the structure of epoxy network. Storage modulus (E') of all composites calculated at 200 deg C was in the range 5 X 10~2 - 33 X 10~2 MPa and glass transition temperature (T_g) was in the range of 139-154 deg C. The smoke density decreased with an increase in the char yield whereas the presence of phosphorus in the resin resulted in a significant increase in LOI indicating its flame resistant characteristics.
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