eFunda Polymers: Properties of Polypropylene {copolymer, unfilled, impact modified}
engineering fundamentals Polymer Material Properties
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Polypropylene
 
List of Suppliers
State: copolymer
Additives: unfilled, impact modified
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   345 - 1035  tensile   D638
Flexural Modulus (MPa)   414 - 1104   23 ºC   D790
Tensile Strength (MPa)   24 - 35 at break   D638
  11 - 28 at yield   D638
Compressive Strength (MPa)
at yield or break
  24 - 41     D695
Flexural Strength (MPa)
at yield or break
  28 - 41     D790
Elongation at break (%)   200 - 700     D638
Hardness   50 - 60  Rockwell R   D638
  45 - 55  Shore D   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted
  1.2 - 0     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   68 - 95     D696
Deflection Temperature (ºC)   75 - 89   0.46 MPa   D648
  46 - 57   1.82 MPa   D648
Thermal Conductivity (W/m-ºC)  0.146 - 0.167     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  0.88 - 0.905   D792
Water Absorption (% weight increase)  0.03  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted
  500   D149

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)   -20  Tg, amorphous  
Melting Temperature (ºC)  150 - 168  Tm, crystalline  
Processing Temperature (ºC)  199 - 260  injection molding  
 204 - 260  extrusion  
Molding Pressure (MPa)   69 - 138    
Compression Ratio  2 - 2.4    
Linear Mold Shrinkage (cm/cm)  0.01 - 0.025   D955

Suppliers
A. Schulman Akron, OH  800-662-7203
American Polymers, Inc. Worcester, MA   
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
Huntsman Corp. Salt Lake City, UT  800-421-2411
LG Chemical America, Inc. Englewood Cliffs, NJ   
M.A. Industries, Inc. Peachtree City, GA  800-241-8250
Montell North America Wilmington, DE   
Network Polymers, Inc. Akron, OH  888-437-4674
Phillips Chemical Co. Bartlesville, OK  800-537-3746
Solvay Advanced Polymers, L.L.C. Alpharetta, GA  800-621-4557
Solvay Engineered Polymers Auburn Hills, MI  800-207-6959
Solvay Polymers, Inc. Houston, TX  800-231-6313
Spartech Polycom Washington, PA  800-538-3149
Washington Penn Plastic Co. Washington, PA   
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