Table 1. Physical and Mechanical Properties of Grade G Plexiglas 

 Acrylic Plastic Used for Fabrication of NEMO Hulls 



Physical Properties 



Property 



Typical 



Test Method 



Hardness, Rockwell M 

 Hardness, Barcol 



Specific gravity 



Refractive index; 1/8 inch 



Luminous transmittance; 1/8 inch 



Haze, 1/8 inch 



Heat distortion temperature 

 +3.6°F/minute at 264 psi 

 +3.6°F/minute at 66 psi 



Thermal expansion/°F at 20°F 



Water absorption; 1/8 inch 

 24 hr at 73°F 

 To saturation 



90 



90 



1.19 ±0.01 

 (2 tests within 0.005) 



1.50 ±0.01 



91% 

 2.3 



200°F 

 220°F 



35x10~ 6 



0.3% 

 1 .9% 



ASTM-D785-62 

 ASTM-D2583 



ASTM-D792-64T 



ASTM-D542-50 

 ASTM-D 1003-61 

 ASTM-D 1003-61 



ASTM-D648-56 

 ASTM-D648-56 



Fed. Std 406 

 Method 2031 



ASTM-D570-63T 

 ASTM-D570-63T 



Mechanical Properties 



Property 



Minimum Requirement 



Test Method 



Tensile strength, rupture 

 (0.2 in. /minute) 



Tensile elongation, rupture 



Modulus of elasticity, tension 



Compressive strength, yield 

 (0.2 in. /minute) 



Modulus of elasticity, compression 



Flexural strength, rupture 



Shear strength, rupture 



Impact strength, 1 zod 

 (per inch of notch) 



Compressive deformation under load 

 (4,000 psi at 122°Ffor24hr) 



9,000 psi 



2% min to 7% max 

 400,000 psi 



1 5,000 psi 



420,000 psi 

 14,000 psi 

 8,000 psi 



0.4 ft-lb 

 2.0% max 



ASTM-D638-64T 



ASTM-D638-64T 

 ASTM-D638-64T 



ASTM-D695-63T 



ASTM-D695-63T 

 ASTM-D790-63 

 ASTM-D732-46 



ASTM-D256-56 

 ASTM-D621-64 



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