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Poly(tetrahydrofuran)

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Poly(tetrahydrofuran) Basic information

Product Name:
Poly(tetrahydrofuran)
Synonyms:
  • 4-butanediyl),.alpha.-hydro-.omega.-hydroxy-poly(oxy-1
  • alpha-hydro-omega-hydroxy-poly(oxy-4-butanediyl)
  • b2000
  • glycols,polytetramethylene
  • hiprenemc532
  • polifurit
  • poly(butyleneoxide)
  • poly(oxy-1,4-butylene)glycol
CAS:
25190-06-1
MF:
C16H33O5X2
MW:
305.43
EINECS:
607-637-9
Product Categories:
  • Ethers
  • Hydrophobic Polymers
  • Materials Science
  • Polymer Science
  • Polymers
  • Tetrahydrofuran
Mol File:
25190-06-1.mol
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Poly(tetrahydrofuran) Chemical Properties

Melting point:
33-36 °C
Density 
1 g/mL at 25 °C
vapor pressure 
<0.01 mm Hg ( 25 °C)
refractive index 
n20/D 1.465
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)
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Safety Information

Hazard Codes 
Xi
Risk Statements 
36/37/38
Safety Statements 
26-36
WGK Germany 
1
RTECS 
MD0916000
HS Code 
3907 20 20
Toxicity
LD50 orally in Rabbit: > 5000 mg/kg

MSDS

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Poly(tetrahydrofuran) Usage And Synthesis

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.

Poly(tetrahydrofuran)Supplier

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