eFunda Polymers: Properties of Acrylic {impact modified, molding and extrusion compounds}
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Acrylic		  
List of Suppliers
Additives: impact modified
Application: molding and extrusion compounds
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   1656 - 2553  compressive   D638
  1380 - 3450  tensile   D638
Flexural Modulus (MPa)   1380 - 2967   23 ºC   D790
Tensile Strength (MPa)   35 - 63 at break   D638
  38 - 59 at yield   D638
Compressive Strength (MPa)
at yield or break		   28 - 97     D695
Flexural Strength (MPa)
at yield or break		   49 - 97     D790
Elongation at break (%)   5 - 70     D638
Hardness   35 - 78  Rockwell M   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted		   0.2 - 1.3     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   48 - 80     D696
Deflection Temperature (ºC)   83 - 97   0.46 MPa   D648
  74 - 99   1.82 MPa   D648
Thermal Conductivity (W/m-ºC)  0.167 - 0.209     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.11 - 1.18   D792
Water Absorption (% weight increase)  0.19 - 0.8  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted		   380 - 500   D149

 Processing Properties Conditions
Type ASTM
Melt Flow (gm/10 min)  1 - 11   D1238
Melting Temperature (ºC)   80 - 103  Tg, amorphous  
Processing Temperature (ºC)  205 - 260  injection molding  
 149 - 205  compression molding  
 194 - 249  extrusion  
Molding Pressure (MPa)   35 - 138    
Linear Mold Shrinkage (cm/cm)  0.002 - 0.008   D955

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Suppliers
AtoHaas Americas, Inc. Philadelphia, PA   
Continental Acrylics, Inc. Compton, CA  800-562-8883
Cyro Industries Rockaway, NJ  800-631-5384
DuPont Co., Polymers Wilmington, DE  800-438-7225
ICI Acrylics, Inc. Cordova, TN  800-325-9577
Network Polymers, Inc. Akron, OH  888-437-4674
RTP Co. Winona, MN  800-433-4787

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