Citation
Abdul Khalil H.P.S., . and Issam A.M., . (2006) Synthesis and properties of polyurethanes based on a new schiff base liquid crystalline diol for industrial resins. [Proceedings Paper]
Abstract
A new liquid crystalline diol 3.3-dimethoxy-4 4 di 6-hydroxyhexoxy -N- benzylidene-o- Tolidine I was confirmed by elemental analysis CHN 1H-NMR FTIR UV and Mass spectroscopies. Polyurethanes I a-c were prepared by reacting of this diol I with commercial diisocyanates such as hexamethylene diisocyanate HDI a Methylene- 4 4- diphenyl diisocyanate MDI b and Toluene-2 4 -diisocyanate TDI c. Polyurethanes were investigated by 1H-NMR FTIR UV and CHN analysis. Thermogravimetric analysis TGA differential scanning calorimetry DSC wide-angle X-ray diffraction WAXD and polarizing light microscope techniques have been used to characterize thermal properties ceystallinity and phase behaviour of diol I and polyurethanes I a-c. Diol I exhibits enantiotropic nematic phase.
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Abstract
A new liquid crystalline diol 3.3-dimethoxy-4 4 di 6-hydroxyhexoxy -N- benzylidene-o- Tolidine I was confirmed by elemental analysis CHN 1H-NMR FTIR UV and Mass spectroscopies. Polyurethanes I a-c were prepared by reacting of this diol I with commercial diisocyanates such as hexamethylene diisocyanate HDI a Methylene- 4 4- diphenyl diisocyanate MDI b and Toluene-2 4 -diisocyanate TDI c. Polyurethanes were investigated by 1H-NMR FTIR UV and CHN analysis. Thermogravimetric analysis TGA differential scanning calorimetry DSC wide-angle X-ray diffraction WAXD and polarizing light microscope techniques have been used to characterize thermal properties ceystallinity and phase behaviour of diol I and polyurethanes I a-c. Diol I exhibits enantiotropic nematic phase.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | 3 ills. 2 tables. 18 refs. |
| AGROVOC Term: | LIQUIDS |
| AGROVOC Term: | CRYSTALLIZATION |
| AGROVOC Term: | RESINS |
| AGROVOC Term: | OWNERSHIP |
| AGROVOC Term: | MALAYSIA |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Norfaezah Khomsan |
| Last Modified: | 24 Apr 2025 05:28 |
| URI: | http://webagris.upm.edu.my/id/eprint/16891 |
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