Research Article
Properties of Vulcanized Polyisoprene Rubber Composites Filled with Opalized White Tuff and Precipitated Silica
Table 4
Assignment of the bands in the FTIR spectra of OWT and PSi.
| Assignment | OWT | PSi |
| Si–O out of plane deformation | 466 cm−1 | 467 cm−1 | Si–O bending | 792 cm−1 | 795 cm−1 | Si–OH stretching | 907 cm−1 | — | Si–O–Si stretching | 1119 cm−1 | 1088 cm−1 | O–H (molecular water) | 1635 cm−1 | 1641 cm−1 | OH stretching | 3438 cm−1 | 3480 cm−1 |
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