Polypropylene oxide,triamine terminated

• CAS: 39423-51-3
• Catalog Number: ACM39423513
• Category: Main Products
• Molecular Weight: 480
• Molecular Formula: C₂H₅C[CH₂[OCH₂CH(CH₃)]nNH₂]3
• Synonyms: Poly[oxy(methyl-1,2-ethanediyl)],.alpha.-hydro-.omega.-(2-aminomethylethoxy)-,etherwith2-ethyl-2-(hydroxymethyl)-1,3-propanediol(3:1);Trimethylolpropanepoly(oxypropylene)triamine;trimethylolpropanetris(poly(propyleneglycol);POLYETHERAMINE T 403;TRIMETHYLO
• IUPAC Name: Poly[oxy(methyl-​1,​2-​ethanediyl)​]​, α-​hydro-​ω-​(2-​ami...
• Flash Point: 385°F
• Density: 0.9812
• Appearance: Colourless liquid
• Alpha Sort: Polypropylene oxide, triamine terminated
• Exact Mass: 0.00000
• Viscosity: 72cs (25°C)

Case Study

Development of Triamine-Terminated Polypropylene Oxide for Two-Component Curable Underwater Adhesives

Qie, Runtian, et al. ACS Applied Polymer Materials 5.3 (2023): 1646-1650.

A curing functionality is achieved by creating a two-component system consisting of epoxidized poly(propylene oxide)/tannic acid coacervate as component A and amine-terminated poly(propylene oxide) as component B.
Preparation Strategy
The first component, part A, is produced through the coacervation of diepoxide-terminated PPO and tannic acid, resulting in an adhesive that exhibits glue-like consistency and underwater bonding capability; however, it does not cure independently. To enable curing, part A is mixed with an optimized quantity of triamine-terminated PPO (part B). At room temperature, it is anticipated that the amine and epoxide groups will react. The amine groups are also expected to interact with tannic acid through noncovalent (hydrogen bonding and cation-π interactions) and covalent (Schiff base and Michael-type addition reactions) mechanisms. The interplay of these reactions is expected to yield a curable underwater adhesive.
Performance of Curable Underwater Adhesives
By adjusting the proportion of part B, it was determined that a 10: The 10:1 proportion between part A and part B achieves perfect cross-linking while maintaining strong underwater bonding. The two-component adhesive showed improved underwater adhesion strength (~500 kPa) due to its higher viscosity and cohesive properties. When submerged in artificial seawater for two days, the adhesive still cured successfully and reached a lap shear strength of approximately 3 MPa.

Star-Shaped Block Copolymers Created Through a Synthesis Process with Triamine-Terminated Polypropylene Oxide

Sanchez-Ferrer, et al. Macromolecules 43.2 (2010): 1093-1100.

Researchers successfully produced ten new rod-coil block copolymers with poly(γ-benzyl-l-glutamate) (PBLG) as the rod segment and poly(propylene oxide) (PPO) as the coil portion. The use of various macroinitiators with terminal amines like monoamine, diamine, and triamine (called M-2005, D-2000, D-4000, T-3000 and T-5000 based on molecular weights) facilitated the synthesis of both diblock copolymers and more complex triblock as well as star-shaped copolymers.
BLG-NCA Monomer Synthesis
A 500 mL two-neck round-bottom flask equipped with a magnetic stirrer, condenser, and nitrogen inlet received 15 g (63.2 mmol, 1 equiv) of γ-benzyl L-glutamate and 8.13 g (27.4 mmol, 0.43 equiv) of triphosgene before purging with nitrogen for 10 minutes. The system received 250 mL of dried freshly distilled ethyl acetate before heating the mixture to a temperature of 145 °C. The reaction underwent cooling after 4 to 5 hours once HCl emission started to appear. The monomer produced a yield of 15.3 g (91%) after recrystallization from a solution of ethyl acetate and cyclohexane.
Polymer Synthesis
The BLG-NCA monomer and amino-terminated poly(propylene oxide) macroinitiator were separately dissolved in DMF inside dried flasks under nitrogen conditions while maintaining room temperature. The monomer solution was injected into the polymer solution via syringe. The mixture was stirred for three days at room temperature under inert nitrogen conditions. Upon completion of the polymerization, the solvent was removed under low pressure. The concentrated polymer solution was dissolved in DCM and reprecipitated using methanol. After centrifugation and three washes to remove the supernatant, the resulting rubberlike material was freeze-dried for half a day, achieving a yield of 80-90%.