Research Article
Physical and Thermal Characterization of Alkali Treated Rice Husk Reinforced Polypropylene Composites
Table 2
FTIR data for pure polypropylene and alkali treated 5 wt% RH-PP composite.
| | Wavenumber, cm−1 (PP) | Functional groups |
| | 2929.87 (moderate) | CH2 asymmetric stretching | | 2855.25 (weak) | CH2 symmetric stretching | | 1454.33 (moderate) | CH3 asymmetric stretching | | 1211.30 (strong) | Isotactic band | | 1149.57 (strong) | Vibration of the rocking of –CH3 & –CH2 | | 1029.99 (weak) | Stretching of CH–CH2 |
| | Wavenumber, cm−1 (composite) | Functional groups |
| | 3200–3800 (moderate) | OH stretching of cellulose and water molecule | | 2850–3000 (strong) | CH, CH2, or CH3 stretching | | 1600–1700 (moderate) | C=C group | | 1475–1600 (weak) | C=C stretching of aromatic rings from lignin | | 1375–1450 (weak) | C–O–H bending of ester | | 1000–1300 (strong) | C–O stretching | | 690–900 (moderate) | C–H bending |
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