Polymer Type/Chemistry - Epoxy Epoxy Epoxy BMI BMI Polyimide Glass Transition, Tg Dry ºC >375 200 194 210 271 316 338 Tensile Strength (MPa) 105 120 83 45.5 103 - 38.6 Tensile Modulus (GPa) 4.0 4.6 4.1 4.2 4.6 - 3.9 Tensile Strain to Failure, % 4.0 1.7 - 1.15 4.8 - 1.5 Fracture Toughness, K 1C (MPa/m 1/2 ) 1.03 1.34 - 0.67 0.85 0.46 0.33 Flexural Strength (MPa) 140 - 69 - 163 - - Compressive Strength (MPa) 149 - - - - - - H 2 O Equilibrium Absorption 2.5% 3.1% - 3.1% 4.2% 4.3% 4.4%