Abstract
Inverse gas chromatography (IGC) was employed to investigate the dispersive component of the surface free energy and the surface acid-base properties of the thermoplastic polyurethane elastomer (DTPU), surface properties of which were then compared with those of the traditional thermoplastic polyurethane elastomer (BTPU) that can be used as the propellant binder. It is found that the dispersive component of the surface free energy of DTPU is close to that of BTPU and the dispersive component of the surface free energy decreases linearly with increasing temperature. The Lewis acidic number K a and the basic number K b of DTPU are 0.09 and 0.48 respectively. The surface Lewis base number and total acid-basic ability of DTPU are higher than those of BTPU, whose Lewis acidic number is 0.06 and basic number is 0.37. Therefore, DTPU has better interactions with high-energy solid fillings.
| Original language | English |
|---|---|
| Pages (from-to) | 28-31 |
| Number of pages | 4 |
| Journal | Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering |
| Volume | 28 |
| Issue number | 2 |
| Publication status | Published - Feb 2012 |
Keywords
- IGC
- Lewis acid-base properties
- Surface free energy
- Thermoplastic polyurethane