Polymethyl methacrylate (PMMA)

Characteristic

Test method

Item

Standard

Melt Flow Rate (230C/3.8 kg)

ASTM D 1238

G/10 MIN

3.7

Specific Gravity

ASTM D792

-

1.19

Mold Shrinkage

ASTM D955

%

0.2-0.6

Water Absorption (24 hr immersion)

ASTM D570

% WEIGHT
GAIN

0.3

Tensile Strength at maximum

ASTM D638

PSI

10.200

Tensile Elongation at Break

ASTM D638

%

6

Tensile Modulus

ASTM D638

PSI

450.000

Flexural Strength at maximum

ASTM D790

PSI

15.000

Rockwell Hardness, Scale M

ASTM D785

-

93

HDT (High  Deformation Temperature)  (0.455 MPA; annealed)

ASTM D648

F

221

HDT (High
Deformation Temperature) (1.82 MPA;
annealed)

ASTM D648

F

216

Vicat Softening Point (50C/hr; 10N)

ASTM D1525

F

232

Vicat Softening Point (50C/hr; 50N)

ASTM D1525

F

219

Thermal Conductivity

ASTM C177

BTU/HR*FT2*F/IN

1.3

Flammability

ASTM UL94

CLASS

HB

Refractive Index (Nd at 72 F)

ASTM D542

-

1.49

Luminous Transmittance (0.125 in/3.2 mm)

ASTM D1003

%

92

Haze (0.125 in/3.2 mm)

ASTM D1003

%

<1