eFunda Polymers: Properties of Polypropylene {homopolymer, unfilled}
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Polypropylene		  
List of Suppliers
State: homopolymer
Additives: unfilled
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   1139 - 1553  tensile   D638
  1035 - 2070  compressive   D638
Flexural Modulus (MPa)   1173 - 1725   23 ºC   D790
  345   94 ºC   D790
  242  122 ºC   D790
Tensile Strength (MPa)   32 - 42 at break   D638
  32 - 38 at yield   D638
Compressive Strength (MPa)
at yield or break		   38 - 56     D695
Flexural Strength (MPa)
at yield or break		   42 - 56     D790
Elongation at break (%)   100 - 600     D638
Hardness   80 - 102  Rockwell R   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted		   0.2 - 0.7     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   81 - 100     D696
Deflection Temperature (ºC)  108 - 122   0.46 MPa   D648
  49 - 60   1.82 MPa   D648
Thermal Conductivity (W/m-ºC)  0.117     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  0.9 - 0.91   D792
Water Absorption (% weight increase)  0.01 - 0.03  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted		   600   D149

 Processing Properties Conditions
Type ASTM
Melt Flow (gm/10 min)  0.4 - 100   D1238
Melting Temperature (ºC)   -20  Tg, amorphous  
Melting Temperature (ºC)  160 - 175  Tm, crystalline  
Processing Temperature (ºC)  191 - 288  injection molding  
 205 - 260  extrusion  
Molding Pressure (MPa)   69 - 138    
Compression Ratio  2 - 2.4    
Linear Mold Shrinkage (cm/cm)  0.01 - 0.025   D955

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Suppliers
A. Schulman Akron, OH  800-662-7203
American Polymers, Inc. Worcester, MA   
Amoco Chemicals Lisle, IL  800-621-4567
Aristech Chemical Corp. Pittsburgh, PA   
Bamberger Polymers, Inc. Jericho, NY   
ComAlloy International Co. Nashville, TN   
Dow Plastics Midland, MI  800-441-4369
Epsilon Products Co. Marcus Hook, PA  800-522-7509
Equistar Chemicals LP Houston, TX  888-777-0232
Exxon Chemical Co. Houston, TX  800-231-6633
Federal Plastics Corp. Cranford, NJ  800-541-4424
Ferro Corp. Cleveland, OH   
Fina Oil & Chemical Co. Dallas, TX  800-344-3462
Huntsman Corp. Salt Lake City, UT  800-421-2411
Montell North America Wilmington, DE   
Network Polymers, Inc. Akron, OH  888-437-4674
Phillips Chemical Co. Bartlesville, OK  800-537-3746
R.S.G. Polymers Corp. Stony Brook, NY   
Shuman Plastics, Inc. Depew, NY   
Solvay Polymers, Inc. Houston, TX  800-231-6313
Union Carbide Corp. Danbury, CT  800-335-8550
Washington Penn Plastic Co. Washington, PA   

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