Poly(tetrahydrofuran)
Synonym(s):α-Hydro-ω-hydroxypoly(oxy-1,4-butanediyl);Poly(1,4-butanediol);polyTHF;Terathane 2000 polyether glycol;Terathane 650 polyether glycol
- CAS NO.：25190-06-1
- Empirical Formula: (C4H8O)nH2O
- Molecular Weight: 305.43
- MDL number: MFCD00148879
- EINECS: 607-637-9
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-12-18 14:08:57
What is Poly(tetrahydrofuran)?
Chemical properties
mp 11 - 38 °C 100 - 4,400 mPa.s @ 40 °C
Definition
ChEBI: A macromolecule composed of repeating oxybutylene units.
Preparation
Low molecular weight polymers of tetrahydrofuran were introduced commercially in 1955. The polymers were intended for use in the preparation of
flexible polyurethane foams, being terminated by hydroxyl groups:
Although these polyethers produced good foams they were rather expensive and were soon displaced by the cheaper propylene oxide-based polyethers. However, these polymers of tetrahydrofuran (commonly called poly(oxytetramethylene)glycol) now find use in the preparation of polyamide, polyester and polyurethane thermoplastic elastomers.
Details of the manufacture of polytetrahydrofuran have not been disclosed. Polymerization of tetrahydrofuran can be effected only by cationic initiators. Combinations of metal halides with water are not effective but protic acids (e.g. HCl04) and oxonium salts (e.g. (C2H5￡?3O+BF4-) are efficient initiators. Polymerization occurs by a ring-opening mechanism involving a tertiary oxonium ion, e.g.
Properties of Poly(tetrahydrofuran)
| Melting point: | 33-36 °C |
| Density | 1 g/mL at 25 °C |
| vapor pressure | <0.01 mm Hg ( 25 °C) |
| refractive index | n |
| Flash point: | >230 °F |
| storage temp. | Store below +30°C. |
| solubility | <10g/l |
| Specific Gravity | 0.961 |
| PH | 7 (H2O, 20℃)Aqueous solution |
| EPA Substance Registry System | Poly(oxy-1,4-butanediyl), .alpha.-hydro-.omega.-hydroxy- (25190-06-1) |
Safety information for Poly(tetrahydrofuran)
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H412:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P273:Avoid release to the environment. |
Computed Descriptors for Poly(tetrahydrofuran)
Poly(tetrahydrofuran) manufacturer
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