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Q: Plastic Properties
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Plastic Properties

Plastic Acroynms
ABS         Acrylonitrile Butadiene Styrene
E-CTFE    Ethylene chlorotrifluoroethylene(Halar®)
FEP          Fluorinated ethylenepropylene(Teflon® FEP)
FKM         Fluoroelastomer(Viton®)
HDPE       Polyethylene(high density)
LDPE       Polyethylene(low density)
PA           Polyamide
PC           Polycarbonate
PFA         Perfluoroalkoxy(Teflon® PFA)
PMP        Polymethylpentene(TPX®)
PP           Polypropylene
PS           Polystyrene
PSU        Polysulfone
PTFE       Polytetrafluoroethylene (Teflon®)
PVC        Polyvinyl chloride
PVDF      Polyvinylidene fluoride (Kynar®)
SAN        Styrene-acrylnitrile
SIR         Silicone rubber

Substance class
at 20° C
PS PC PA SAN ABS PVC LDPE HDPE PP PMP ECTFE PTFE/
FEP/
PFA
SIR
Aldehydes - 0 0 - - - + + + 0 + + 0
Alcohols,
aliphatic
+ + 0 + + + + + + + + + +
Esters - - + - - - 0 0 0 0 + + 0
Ethers - - + - - - - 0 - - + + -
Ketones - - + - - - 0 0 0 0 0 +  
Hydrocarbons                          
aliphatic - 0 + - - + 0 + + 0 + + -
aromatic - - + - - - 0 + 0 - + + -
halogenated - - 0 - - - - 0 0 - + + -
Acids, weak/
diluted
0 0 0 0 0 + + + + + + + 0
Acids, strong/
concentrated
0 - - - - + + + + + + + -
Acids, oxidizing - - - - - - 0 0 0 0 0 + -
Bases   - 0 + 0 + + + + + + + +

+ = excellent chemical resistance
Plastic not damaged after 30 days continuous contact with the substance. The plastic may remain resistant for years.
0 = good/limited chemical resistance
Continous contact for approx. 7 to 30 days causes slight damage which may be partially reversible (softening, swelling, reduction of mechanical strength,
discoloration).
- = low chemical resistance
Continuous contact causes immediate damage to the plastic (reduction of mechanical strength, deformation, discoloration, cracks, dissolution, risk of breakage).

Material Characteristics

                     
 Plastic   Temperature     Sterilization5          
  max.1 °C min2 °C steam4
121 °C
Gas,
ethylene
oxide
Irradiation,
2.5 kGy
Ethanol Transparency Flexibility Specific
Weight,
g/cm3
Water
absorption%
ABS 90 -40 no no no no opaque good 1.05 0.27
E-CTFE 150° - 100° yes yes no yes transparent moderate 1.7 < 0.10
FEP 205° - 255° yes yes no yes transparent excellent 2.15 < 0.01
FKM 200° - 20°         black good 1.9  
HDPE 110° - 50° no yes yes yes transparent rigid 0.95 0.01
LDPE 95° - 50° no yes yes yes transparent excellent 0.92 0.01
PA 90° - 0° no yes yes yes transparent rigid 1.13 1.3
PC 135° - 135° yes yes yes yes clear stiff 1.2 0.35
PFA 250° - 270° yes yes no yes transparent excellent 2.15 0.03
PMP 175° - 150° yes yes yes yes glass-clear stiff 0.83 0.01
PP 135° yes yes no yes transparent stiff 0.9 0.02
PS 70° - 20° no yes yes yes glass-clear stiff 1.05 0.0
PSU 165° -100° yes yes   yes clear stiff 1.24 0.3
PTFE 270° -270° yes yes no yes opaque excellent 2.25 <0.01
PVC 70° -30° no3 yes no yes clear stiff 1.35 0.06
PVDF 160° -4° yes yes yes yes transparent stiff 1.78 0.04
SAN 95° -40° no yes no yes glass-clear stiff 1.03 0.05
SIR 180° -60° yes yes no yes transparent excellent 1.1  

1 even higher for short periods
2 embrittlement temperature
3 except for PVC tubing which can be sterilized with steam up to 121°.
4 Frequent steam sterilization reduces mechanical stability!
5 First rinse apparatus with distilled water (prevents stress cracks). Remove or slightly unscrew the caps of sealed vessels, retighten when cooled down.


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