Physical Properties


Physical and Mechanical Properties
PROPERTIES1
METHOD OR CONDITIONS
PARYLENE C
EPOXIES2
SILICONES2
URETHANES2
Secant modulus, psi ASTM D882-56T @ 1% strain 400,000 350,000 900 1,000-10,000
Tensile strength, psi ASTM D882-56T @ 10% strain/min 10,000 4,000-13,000 800-1000 175-10,000
Yield strength, psi ASTM D882-56T @ 10% strain/min 8,000      
Elongation to break, % ASTM D882-56T @ 10% strain/min 200 3-6 100 100-1,000
Yield elongation, % ASTM D882-56T @ 10% strain/min 2.9      
Density, gm/cc ASTM D1505-57T 1.289 1.11-1.40 1.05-1.23 1.10-2.5
Index of refraction, N 23 Abbe refractometer 1.639 1.55-1.61 1.43 1.50-1.60
Water absorption, 24 hrs ASTM D570-57T 0.06 0.08-0.15 12 (7 days) 0.02-1.5
Rockwell hardness ASTM D785-65 R80 M80-M110 40-45 (shore A) 10A-230 (shore)
Coefficient of friction: ASTM D1894-63  
Static 0.29      
Dynamic 0.29      
1.Properties measured on parylene films, 0.001-.0003 inch thick, except where specified.
2.Properties depend somewhat on deposition conditions.