eFunda Polymers: Properties of Acrylic {copolymer, MMA / styrene, molding and extrusion compounds}
engineering fundamentals Polymer Material Properties
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Acrylic		  
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State: copolymer
Additives: MMA / styrene
Application: molding and extrusion compounds
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   1656 - 2553  compressive   D638
  2967 - 3588  tensile   D638
Flexural Modulus (MPa)   3105 - 3174   23 ºC   D790
Tensile Strength (MPa)   56 - 70 at break   D638
Compressive Strength (MPa)
at yield or break		   76 - 104     D695
Flexural Strength (MPa)
at yield or break		   98 - 111     D790
Elongation at break (%)   2 - 5     D638
Hardness   80 - 85  Rockwell M   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted		   0.2 - 0.2     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   60 - 80     D696
Deflection Temperature (ºC)   98 - 100   1.82 MPa   D648
Thermal Conductivity (W/m-ºC)  0.167 - 0.209     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.06 - 1.13   D792
Water Absorption (% weight increase)  0.11 - 0.17  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted		   450   D149

 Processing Properties Conditions
Type ASTM
Melt Flow (gm/10 min)  1.1 - 24   D1238
Melting Temperature (ºC)  100 - 105  Tg, amorphous  
Processing Temperature (ºC)  149 - 260  injection molding  
 149 - 205  compression molding  
Molding Pressure (MPa)   69 - 207    
Linear Mold Shrinkage (cm/cm)  0.002 - 0.006   D955

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Suppliers
Network Polymers, Inc. Akron, OH  888-437-4674
NOVA Chemicals, Ltd. Calgary, Alberta T2P 5C6, Canada   

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