Chemical Stability of SUMIKAEXCEL PES

  • SUMIKAEXCEL PES is not susceptible to hydrolysis
  • Please note that SUMIKAEXCEL PES may be affected by strong acids
  • SUMIKAEXCEL PES has outstanding chemical resistances among most amorphous polymers. However, precautions must be observed in accordance with conditions of actual usage, as some organic chemicals such as ketones and esters may cause stress cracking. In addition, please note that SUMIKAEXCEL PES does dissolve in highly polar solvents such as dimethylsulfoxide (DMSO), aromatic amines, nitrobenzene and some chlorinated hydrocarbons (i.e., dichloromethane, chloroform).
  • SUMIKAEXCEL PES possesses excellent resistances to aliphatic hydrocarbons, alcohols, certain types of chlorinated hydrocarbons, certain aromatic chemical agents, oil and grease. Furthermore, depending upon conditions of actual usage, SUMIKAEXCEL PES is not usually affected by most bleaches and disinfectants.

However, chemical effects should be evaluated based on actual conditions prior to usage.

Hot water Resistance

SUMIKAEXCEL PES is not susceptible to hydrolysis in either hot water, or in steam having a temperature of 160 deg C. However, attention must be paid to potential changes in its properties that may occur due to the absorption of water.

Table 1 Resistance to Hot Water Under Load (Hot Water at 90 deg C)

Stress (MPa)
13 20 26 33 40
Polyethersulfone 4100G(Non-reinforced) R56.5 R20.2 R15.3 R12.5 -
4800G(Non-reinforced) 989.6 R65.5 R18.7 - -
4101GL30(GF30%) - - 987.3 732.5 R25.5
PPS(GF40%) - - R130 R87 -

(Legend) R56.5: Ruptured after 56.5 hours [R = ruptured].
987.3: No problems up until 98.7 hours.

Table 2 Hot water Resistance at 140 deg C (4100G)

Period
(Weeks)
Tensile Strength
(MPa)
Rate of Change
(%)
Charpy Impact Strength
(J/m)
Rate of Change
(%)
Control 81 100 382 100
2 88 108 176 46
7 93 114 137 35
14 92 113 137 34
29 81 100 137 37
42 84 104 147 39
  • Steam Sterilization at 140 deg C
    The tensile strength of SUMIKAEXCEL PES does not change at all, even after steam sterilization has been performed at 140 deg C 24 hours. A 1% increase in weight occurred during this time.

* 4800G, with high molecular weight, possesses greater resistance to severe hot water conditions than 4100G.4800G, with high molecular weight, possesses greater resistance to severe hot water conditions than 4100G.

Inorganic Chemical Resistance

SUMIKAEXCEL PES can withstand greases; oils, such as gasoline and engine oils; and cleaning solvents, such as Chlorothene and Freon. However, SUMIKAEXCEL PES is affected by polar solvents such as acetone and chloroform therefore additional precautions must be taken whenever these solvents are used. SUMIKAEXCEL PES possesses the highest resistance to stress cracking among most amorphous resins (Table 3).
SUMIKAEXCEL PES is resistant to the effects of acid and alkali compounds, even at high temperatures.

Table3 Changes of Weight and Tensile Strength in Inorganic

Chemical Name Grade Temperature
(deg C)
Weight Change Tensile Strength Change(%) Remarks
Immersion
Time
Weight
Change
Immersion Time (Days)
(Days) (Wt%) 14 30 90 180 360
Water 4100G Room Temperature 1 0.43 - -17.7 -16.6 -21.1 - -
Water 4100G 50 - - - -13.5 -13.1 -17.7 - -
Water 4100G 100 - - 7.0 7.4 9.8 9.2 9.5 -
10% hydrochloric acid 4100G Room Temperature 180 1.95 -15.6 -14.9 -17.8 -21.1 - -
Concentrated
hydrochloric acid
4100G Room Temperature 180 2.19 - -6.3 -12.2 -21.1 - -
15% hydrochloric acid 4100G 90 - - - - -40.4 -49.0 -53.0 Significant crazing occurs
10% sulfuric acid 4100G Room Temperature 180 1.82 - -13.2 -17.7 -23.4 - -
50% sulfuric acid 4100G 60 14 -0.39 6.3 - - - - -
50% sulfuric acid 4101GL30 60 14 -0.20 - - - - - -
Concentrated
sulfuric acid
4100G Room Temperature - - - - - - - Dissolves
25% sulfuric acid 4100G 90 - - - - 2.0 3.0 7.0 -
40% sulfuric acid 4100G 60 14 -0.55 - - - - - -
40% phosphoric acid
40% sulfuric acid 4101GL30 60 14 -0.37 - - - - - -
40% phosphoric acid
10% nitric acid 4100G Room Temperature 180 2.27 - - - - - -
Concentrated nitric acid 4100G Room Temperature - - - - - - - Dissolves
5% nitric acid 4100G 90 - - - - 0.0 -29.0 -24.0 Slight crazing occurs
10% caustic soda 4100G Room Temperature 180 1.79 - -13.9 -18.2 -22.3 - -
Saturated caustic soda 4100G Room Temperature 180 0.82 - -4.8 -11.0 -14.2 - -
5% caustic soda 4100G 90 - - - - 3.0 2.0 6.1 -
Saturated
potassium chloride
4100G Room Temperature 120 1.46 - - - - - -
Saturated
sodium hypochlorite
4100G Room Temperature 180 1.42 - -9.8 -15.8 -19.6 - -
25% saturated
sodium hypochlorite
4100G 90 - - - -10.0 -9.0 -6.0 - -
10% ammonium
hydroxide
4100G Room Temperature 120 1.63 - - - - - -
Aqueous hydrogen
peroxide
4100G Room Temperature 120 2.52 - -9.8 - - - -
Chlorinated
bromine water (PH4)
4100G Room Temperature 180 1.42 - -9.8 -15.8 -19.6 - -
5% alum 4100G 90 - - - - -8.0 -11.0 -12.0 Slight crazing occurs
Sulfur dioxide 4100G Room Temperature 180 8.49 - -15.0 - -34.0 - -
Nitrogen dioxide 4100G Room Temperature 180 1.19 - -4.5 - -4.5 - -
Sulfur hexafluoride 4100G Room Temperature 30 -0.11 - 2.4 - -19.6 - -
Chlorine 4100G Room Temperature 28 0.47 - -62.8 - - - Cracking occurs

Organic Chemical Resistance

Stress Cracking Resistance

Constant loads were applied to tensile impact test specimens (thicknesses of 1.6 mm). The test specimens were then soaked in the chemicals for up to 20 minutes. The resulting condition of each test specimen is indicated in Table 4, in accordance with the legend.

Table 4 Stress Cracking Resistance

Stress 10 MPa
Polyethersulfone Poly
sulfone
Poly
carbonate
Modified
PPO
4100G 4800G 4101GL30 Nonreinforced Nonreinforced Nonreinforced
Acetone R1S R4S R2S R1S
Methyl ethyl ketone R1S R2S R1S R18
Cyclohexanone R1S R19S D D D
Benzene C20 R1S R4 D
Toluene R1S R11 D
Xylene R4S R15 D
Trichloroethylene C20 C20 D D
1,1,1-trichloroethane
(Chlorothene)
R8S R3 D
Tetrachloromethane SLC20 R6S D
1,2-dichloroethane R1S R1S D D D
Perchloroethylene C20 R1S D
Chloroform R1S R1S D D D
Trichlorotrifluoroethane
(Freon)
D
Methanol
Ethanol
n-butanol
Ethylene glycol
2-ethoxyethanol C20 SLC20 C20 R17
Propane-1,2-diol
Heptane
Ethyl acetate R31S C20 R3S
Diethyl ether C20 SLC20 C20 R1
Carbon disulfide R8S R1S D
Gasoline C20
Light oil
Stress 19 MPa
Polyethersulfone Poly
sulfone
Poly
carbonate
Modified
PPO
4100G 4800G 4101GL30 Nonreinforced Nonreinforced Nonreinforced
Acetone R1S R3S R2S R1S
Methyl ethyl ketone R1S R1S R1S R5 R20S
Cyclohexanone R1S R5S D D D
Benzene R2 C20 R1S R3 D
Toluene R6 C20 R1S R3 D
Xylene R2S R11 D
Trichloroethylene R6 R11 D R17 D
1,1,1-trichloroethane
(Chlorothene)
R3S R1 D
Tetrachloromethane R3 R3S D
1,2-dichloroethane R1S R1S D D D
Perchloroethylene R8 R1S D
Chloroform R1S R1S D D D
Trichlorotrifluoroethane
(Freon)
D
Methanol
Ethanol
n-butanol C20 C20
Ethylene glycol C20 C20
2-ethoxyethanol C20 C20 C20 R10
Propane-1,2-diol
Heptane SLC20 R19
Ethyl acetate R17S R7 R1S R4
Diethyl ether C20 C20 R7 R1 R15
Carbon disulfide R5S R1S D
Gasoline C20 R3 R1
Light oil
(Legend) After 20 minutes of immersion, no changes at all were observed in the test specimen
C20 After 20 minutes of immersion, crazing occurred on the test specimen.
SLC20 After 20 minutes of immersion, slight crazing occurred on the test specimen.
R8 After 8 minutes of immersion, the test specimen ruptured.
R2S After 2 seconds of immersion, the test specimen ruptured.
D The test specimen dissolved.

Solubility

SUMIKAEXCEL PES is a polar polymer that dissolves in polar solvents. SUMIKAEXCEL PES solubility is important for coating applications and for adhesion of solvents.
Solvents for SUMIKAEXCEL PES are as follows:
dimethylsulfoxide, N,N-dimethylformamide, N-methylpyrrolidone and dimethylacetamide.

Changes in Weight and Tensile Strength

Table 2-9 indicates the weight changes that occur when SUMIKAEXCEL PES is immersed in a variety of different organic chemicals. Although the weight of SUMIKAEXCEL PES will change over a range of -0.5% - 2% when immersed in non-solvent chemicals, depending upon the temperature and time of immersion, the dimensions themselves remain unchanged. When immersed in weak solvents, SUMIKAEXCEL PES generally softens and swells, with its weight changing significantly.

Table 5 Changes in Weight and Tensile Strength When Immersed in Organic Chemicals (4100G)

Chemical Name Grade Temperature
(deg C)
Weight Change Tensile Strength Change Remarks
Immersion
Time
(Days)
Weight
Change
(wt%)
Immersion Time (Days)
7 30 90 180 360
25% acetic acid 4100G 90 - - - - -3.00 -27.00 -42.00 Crazing occurs after 360 days
Glacial acetic acid Room Temperature 30 0.31 - - - - - -
5% phenol Room Temperature 90 6.66 -29.70 -35.70 -45.80 - - -
Hydrazine anhydrous Room Temperature 14 3.50 - - - - - Softens
Benzene Room Temperature 180 1.48 -3.20 -3.10 -8.60 -13.50 - -
Xylene Room Temperature 7 0.49 - - - - - -
Heptane Room Temperature 180 0.21 -0.80 -1.00 -5.80 -10.00 - -
Cyclohexane Room Temperature 120 0.12 - - - - - -
Methanol Room Temperature 14 2.09 - - - - - -
Ethanol Room Temperature 180 1.46 -2.20 -5.00 -13.60 -18.70 - -
Ethylene Glycol Room Temperature 120 0.53 - - - - - -
Propylene Glycol 100 14 -0.36 - - - - - -
Glycerin 150 14 0.06 - - - - - -
White spirits 130 7 -0.51 +21.90 - - - - Slight cracking
Ethyl acetate Room Temperature 60 10.70 - - - - - Softens
Amyl acetate Room Temperature 120 -0.08 - - - - - -
Diethyl ether Room Temperature 120 2.91 - - - - - -
Tetrachloromethane Room Temperature 180 0.44 -0.40 -0.30 -6.40 -11.30 - -
1,1,1-trichloroethane
(Chlorothene)
Room Temperature 120 1.01 -10.20 -19.20 -32.80 -51.60 - -
Genklene Room Temperature 120 1.13 - - - - - -
Perchloroethylene Room Temperature 120 0.78 - - - - - -
North Sea Gas Room Temperature 180 0.01 -0.90 -0.34 - 0.20 - -
Ethylene oxide Room Temperature 190 7.59 - -14.00 - -39.10 - Cracking occurs at a stress of 140 kg/cm2
Propylene gas Room Temperature 180 0.21 -0.60 - - -0.11 - -

Cleaning Solvents

When coating or bonding with SUMIKAEXCEL PES, it is often necessary to remove grease, oil and parting agents from the surface of moldings. For this purpose, the usage of certain cleaning solvents, such as acetone and methyl ethyl ketone, should be avoided. Table 2-10 indicates the effects of cleaning solvents on 4100G.

Table 6 Effects of Cleaning Solvents (4100G)

Cleaning Solvent
(Under Reflux)
Time
(Minutes)
Hardness
(Initial Value = 98)
Weight Increase
(%)
Arklone P 2 98 0
10 98 0
30 98 0
Arklone L 2 98 0
10 98 0
30 98 0
Genklene 2 98 0
10 98 0
30 98 0
Trinklone A 2 98 0
10 98 1
30 98 1
Trinklone N 2 98 1
10 Surface cracking occurs 1
30 Surface cracking occurs 2
Perchloroethylene 2 98 0
10 98 0
30 98 0
Dichloromethane 2 91 3
10 Dissolves
30 Dissolves

Oil , Gasoline and Transmission Fluid Resistance

Table 7 Weight Changes in Oils or Gasoline (4100G)

Environment Immersion Time (Days) Temperature (deg C) Weight Change (%)
Linseed Oil 180 Room Temperature 0.63
Deep Flying Oil 2 180 -0.10
Silicon Oil (ICI 190) 180 Room Temperature 0.37
Veedol ATF 3433 (Transmission Fluid) 365 130 0.38
Castrol ATF 90 160 -0.55
Shell Diala Transmission Fluid 180 Room Temperature 0.30
Castrol ATF Solvent flushing Oil 90 Room Temperature 0.50
Duckhams 20/50 Oil 90 160 2.84
Gunk 90 Room Temperature 0.55
98 Octane Gasoline 180 Room Temperature 0.60
3 Star Gasoline 90 Room Temperature 0.20
ASTM II Oil 7 Room Temperature 0

Figure 1 Changes in Mechanical Properties in Transmission Fluid (4100G)

Figure 1 Changes in Mechanical Properties in Transmission Fluid (4100G)

(Immersion Conditions)
Transmission Fluid : VEEDOL ATF
Temperature : 130 deg C

Table 8 Stress Cracking Resistance in Gasoline (at Room Temperature)

Grade Environment Stress (MPa)
9 19 28 37
4100G Diesel Fuel 20 20 20 20
4100G 97 Octane Gasoline 20 20 SLC20 C20
4100G 100 Octane Gasoline 20 R270h C20 R19
4100G 100 Octane Gasoline 2110h 2110h 2110h 2110h
4101GL30 97 Octane Gasoline 20 20 20 20
4101LG30 100 Octane Gasoline 360h 360h 20 20
R :Cracking
C :Crazing occurs
SLC :Slight crazing occurs
h :Time - numbers with no units represent "minutes"
(Legend) 20 :no problems occurred during a period of 20 minutes
R270h :cracking occurred after 270 hours
2110h :no problems occurred during a period of 2110 hours

Table 9 Stress Cracking Resistance in Oil (Vactralite Oil) (100 deg C)

Grade Notch Radius
(mm)
Stress (MPa)
5 10 20 25 30 40
4100G 0.01 2000h R150h - - - -
4100G 0.25 2300h R110h - - - -
4100G 0.50 - 1450h R330h - - -
4100G 1.00 - 2000h 2000h - 3000h R790h
4100G 2.50* - - 2300h - 2000h R700h
4101GL20 0.50 - - - 1632h R460h R160h

*Mold Notch (Those not marked with an * have a machined notch.)

(Legend) 20 :no problems occurred during a period of 20 minutes
R270h :cracking occurred after 270 hours
2110h :no problems occurred during a period of 2110 hours

Table 10 Stress Cracking Resistance in Turbine Oil (160 deg C)

Grade Oil Notch Radius
(mm)
Stress (MPa)
10 20 30 40
4800G Aeroshell 555 2.5 3000h R1h - -
4101GL20 Aeroshell 555 0.5* 250h R3h - -
4101GL30 Aeroshell 555 2.5 - 3700h - -
4800G Esso Turbo 2380 2.5 3200h - - -
4101GL30 Esso Turbo 2380 2.5 - - 1650h R2h
4800G Esso Turbo 2389 2.5 1400h R20h - -

* Mold Notch (Those not marked with an * have a machined notch.)

(Legend) 20 :no problems occurred during a period of 20 minutes
R270h :cracking occurred after 270 hours
2110h :no problems occurred during a period of 2110 hours

Table 11 Effects of Oil Immersion on Mechanical Properties (4800G)

Oil type Temperature(deg C) Immersion Time (Weeks)
2 4 6 16 32 52
Mineeral Oil 100 + + + + + +
120 + + + + 0 0
140 + 0 0 0 0
Synthetic Hydrocarbon Oil 100 + + + + 0 0
120 + + + + 0 0
140 0 0 0 0 -
Silicon Oil -Dimethyl 120 + + + + 0 0
160 + 0 0 0 0 0
-Methylphenyl 120 + + + + + +
140 + + 0 0 0
160 + 0 0 0 0 0
180 + 0 - - - -
-Chlorophenyl 200 - - - - - -
160 0 0 0 0 0 0
180 - - - - - -
Estel Oil -Diester 120 + + + + 0 0
-Polyester 120 + + 0 0 - -
160 0 0 - - - -
180 0 - - - - -
Polyglycol Oil 100 + + + + + +
120 + + + 0 0 0
140 0 0 0 0 0
Fluorinated Alkylether Oil 180 0 0 0 - - -
200 - - - - - -
Water-soluble Oil Emulsion 80 0 0 0 0 - -
Mineral-based Oils
+ Thickener
Calcium soap 80 + + 0 0 0 0
Lithium soap 120 + 0 0 - - -
Lithium-lead soap 120 0 0 0 0 - -
Calcium complex soap 120 + + + + + -
Synthetic sodium soap 120 0 0 0 - - -
Polyurea 120 0 0 0 0 - -
Diester + Lithium Soap 120 + + + + 0 0
Silicon based Oil Dimethyl+Modified amide 120 + 0 0 0 0 0
Methylphenyl+Lithium Soap 120 + + + + 0 0
140 + + + +
160 + + 0 0
Legend Resistance Retention
+ Excellent 75% or greater
0 Good 50% or greate
- Fail 5 less than 50%

Table 12 Stress Cracking Resistance under Constant Strain in Turbine Oils (4800G)

Oil Temperature
Room Temperature 150 deg C 160 deg C
Strain
3% 2% 1% 0%
Aeroshell 500 0.05 R5 0.15 15
Aeroshell 555 5 R5 15* 15
Aeroshell 750 5 R5 15 -
Castrol 580 5 R5 15 -
Esso Turbo 25 5 R5 25 -
Esso Turbo 274 5 R5 25** 15
Esso Turbo 2380 5 R5 25** 15
Esso Turbo 2389 5 R5 - -
(Legend) * Surface cracking occurred parallel to the resin flow direction .
** Cracking did not occur during a 15-minute exposure.

Bleaches and Liquid Disinfectant Resistance

SUMIKAEXCEL PES is not affected by most bleaches and liquid disinfectants, unless they are in highly concentrated form. After being immersed in liquid disinfectant, molded SUMIKAEXCEL PES products must be rinsed water. If further sterilization is required, steam or dry heat can be applied.

Table 13 Effects of Bleaches and Liquid Disinfectants (4100G)

Solution Weight Change (%) Tensile Strength Change (%)
10% Lissapol N 1.46 -11.6
2% Ivisol 1.35 -14.6
0.5% Gevisol 1.40 -14.8
2% Instrusan 1.42 -15.6
1% Bentenol 1.30 -13.6
1% Soilay 901-SD 1.36 -14.7
Household Bleach 1.27 -

Conditions: immersed for a period of 1 month at room temperature.

Annealing

Residual stresses in molded articles can be relived through annealing processes. Annealing is also effective in improving chemical resistance. This fact can easily be verified by immersing annealed SUMIKAEXCEL PES in toluene or MEK.

Dimensional Changes Due to Water Absorption

SUMIKAEXCEL PES is susceptible to water absorption. From our experiences, however, it is at most 1.1% remain in wait change and 0.15% remain in dimensional change if the test piece is left in the air for long time (until saturated condition).

Figure 3 Water Absorption Dependence of Dimensional Changes

Figure 3 Water Absorption Dependence of Dimensional Changes
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