Views: 305 Author: Vickey Publish Time: 2023-06-29 Origin: Site
Polytetrahydrofuran is an amalgamation of chemical molecules having the formula HO(CH2)4O(CH2)4)nOH or HO((CH2)4O-)n-H. It is also known as poly (tetramethylene ether) glycol or poly (tetramethylene oxide). The substance is a blend of polyether diols with alcohol group terminations. It is created by the polymerization of 1,4-butanediol with tetrahydrofuran.
The product is marketed as low-average molecular weight polymers with molecular weights ranging from 250 to 3000 daltons. It is a white waxy solid in this state, and it melts between 20 and 30 °C. The commercial product can be further processed to create polymers with 40,000 and higher molecular weights.
The most popular polyether polyol utilized globally in the production of high-performance polyurethane elastomers is polytetramethylene ether glycol (PTMEG).PTMEG is utilized in a wide range of applications across several sectors and is well-known for its various performance characteristics and processing benefits. Prepolymers, coatings, adhesives, cast polyurethane resins, spandex fibers, and other polyurethane products are used in these applications. You will receive a thorough introduction in this post.
PTMEG is a high-performance polyol that formulators use to create polyurethane elastomers in a variety of beneficial ways. PTMEG will improve the flexibility, dynamic characteristics, hydrolytic stability, and abrasion resistance of polyurethane elastomers.
The following characteristics of PTMEG-based polyurethanes are present: outstanding impingement abrasion resistance, outstanding flexibility and property retention at low temperatures, high resiliency and rebound properties, excellent mechanical and dynamic properties, as well as low hysteresis.
We provide a wide variety of PTMEG polyols in a variety of molecular weights. The PTMEG 220 and 650 grades are noteworthy in addition to the 1000, 1800, and 2000 molecular weight diols, which are the most common grades of PTMEG.The 220 and 650 grades have lower viscosities and are simpler for formulators to work with as liquids at room temperature. When formulators are looking for improved resilience, rebound, and abrasion qualities, PTMEG 3000 is also a grade of interest.
The physical shapes in which the various PTMEG grades are offered impact their processing characteristics. PTMEG 650, for instance, may be liquid at ambient temperature and has a softening point of 11°C (52°F).
PTMEG 1000 and the other products available in higher molecular weight grades are available as waxy white solids with low melting temperatures that soften at around 24°C (75°F). Higher molecular-weight grades require heating in order to liquefy and release from drums or ISO tanks.
PTMEG polyols are stable, non-hazardous compounds with low toxicity levels. These polyols have a high flashpoint and are stable when handled and stored properly. When working with PTMEG, always keep electrostatic discharge at bay and make sure the workspace and storage rooms have enough ventilation.
