Technical Notes


Thrace-LINQ TECH NOTE #21
GTF 550T/1000T/1500T HIGH STRENGTH GEOTEXTILES
CHEMICAL RESISTANCE OF POLYESTER FILAMENT YARNS

Acids

Compound pH %1 Compound pH %1
Acetic acid, 15% 2.0 100 Lactic Acid conc. 0.7 100
Acetic acid conc. 0.1 100 Maleic acid, 25% 1.3 100
Acetic anhydride - 100 Nitric acid, 15% <0.1 100
Benzoic acid* - 100 Nitric acid, 20% <0.1 69
Boric acid§ 3.5 100 Nitric acid, ³ 30% <0.1 SD**
Chlorosulfonic acid - SD** Oxalic acid* - 100
Chromic acid* - 83 Phosphoric acid, 20% 0.6 92
Citric acid, 15% 1.5 100 Phosphoric acid, 50% 0.1 95
Citric acid, 25% 1.2 100 Phosphoric acid, 85% <0.1 100
Formic acid conc. <0.1 100 Stearic acid§ - 100
Hydrochloric acid, 15% <0.1 100 Sulfuric acid, 15% <0.1 100
Hydrochloric acid, ³ 20% <0.1 SD** Sulfuric acid, 38% battery acid <0.1 100
Hydrofluoric acid, 10% - 93 Sulfuric acid, 50% 0.1 92
Hydrofluoric acid, 20% - 86 Sulfuric acid, 70% 0.1 72
Hydrofluoric acid, 38-40% - SD** Sulfuric acid, ³ 90% £ 0.1 SD**
1 % Strength retention of Trevira Polyester Filament yarns after one year exposure at ambient conditions.
Values obtained from Technical Fibers Group Hoechst Celanese Corporation
§ Saturated aqueous solution
** Severely degraded

Alkalis

Compound pH %1 Compound pH %1
Ammonium hydroxide 8-10 88 Potassium hydroxide, 0.1 12.5 90
Ammonium hydroxide, ³ 2% ³ 11.4 SD* Potassium hydroxide, ³ 2% ³ 13.4 SD*
Calcium hydroxide, ³ 15% 12.4 SD* Sodium hydroxide, 0.1% 12.1 94
Diethylamine 3.5 SD* Sodium hydroxide, ³ 2% ³ 12.8 SD*
Hydrazine, 2% 10.6 76 Triethanolamine 13.3 66
Hydrazine, 5% 10.8 SD* Urea 10.4 91

1 % Strength retention of Trevira Polyester Filament yarns after one year exposure at ambient conditions
Values obtained from Technical Fibers Group Hoechst Celanese Corporation
* Severely degraded
Inorganic Chemicals


Compound pH %1 Compound pH %1
Aluminum sulfate 2.9 100 Potassium nitrate 8.8 100
Ammonium chloride 5.1 100 Potassium perchlorate 9.9 100
Ammonium nitrate* 4.8 100 Potassium permanganate 9.7 100
Ammonium sulfate 4.6 100 Potassium sulfate 7.5 100
Calcium chloride* 7.2 100 Silver nitrate, 25% 4.6 100
Calcium nitrate* 3.9 100 Sodium ammonium hydrogen sulfate 8.2 100
Copper sulfate 3.5 100 Sodium bicarbonate 7.8 100
Ferric chloride 0.8 100 Sodium carbonate 11.2 100
Ferrous sulfate 3.0 100 Sodium chlorate 7.4 100
Magnesium chloride 4.0 100 Sodium chloride 7.4 100
Magnesium sulfate 6.6 100 Sodium nitrate 8.3 100
Nickel sulfate* 4.5 100 Sodium perchlorate* 5.8 100
Potassium bichromate 3.7 100 Sodium sulfate 5.4 100
Potassium bromide 6.5 100 Sodium tetraborate 9.3 100
Potassium carbonate 13.1 100 Sodium thiosulfate 5.4 100
Potassium chlorate 6.9 100 Zinc chloride 2.4 100
Potassium chloride 8.0 100 Zinc sulfate 4.0 100
Potassium chromate 9.4 100      

1 % Strength retention of Trevira Polyester Filament yarns after one year exposure at ambient conditions
Values obtained from Technical Fibers Group Hoechst Celanese Corporation
*50 % alcohol solution

Solvents

Compound %1 Compound %1 Compound %1
Acetone 100 Dimethyl formamide 100 Nitrobenzene 100
Amyl acetate 100 Dimethyl sulfoxide 100 Phenol § § 100
Aniline 100 Epichlorhydrin 100 m-Phenylene diamine* 100
Benzaldehyde 100 Ethanol 100 2-Phenylethylalcohol 100
Benzcatechin* 100 Ether 100 Pyridine 100
Benzene 100 Ethyl acetate 100 Phloroglucinol§ 100
Benzoic acid amide§ 100 Formaldehyde, 30% 100 Pyrogallol 100
Benzyl alcohol SD** Formamide 100 Resorcinol* 100
Butanol 100 Glycol 100 Styrene 100
Butyl acetate 100 n-Hexylamine SD** Tetrachloroethane 92
Carbon tetrachloride 100 Hydroquinone§ 100 Toluene 100
Chloramine 98 Isopropyl alcohol 100 Trichloroethylene 100
Chloroform 100 Methyl acetate 100 Trimethylamine SD**
m-Cresol 100 Methyl alcohol 100 Turpentine 100
Cyclohexanone 100 Methylene chloride 100 White spirit 100
Cyclohexylamine SD** Methyl ethyl ketone 100 Xylene 100
Diacetone alcohol 100 Mineral oil 100    

1 % Strength retention of Trevira Polyester Filament yarns after one year exposure at ambient conditions
Values obtained from Technical Fibers Group Hoechst Celanese Corporation
*Saturated aqueous solution
§Saturated alcohol solution
**Severely degraded
§ § 50% alcohol solution