Differential scanning calorimetry (DSC) and Raman spectroscopy study of poly(dimethylsiloxane)

Structure modification by solvent addition into TEOS/PDMS hybrid materials

“…Rocking vibration of methyl groups appears at 688 cm − 1 (partially overlapped with 700 cm − 1 symmetric stretching of C-Si-C bonds), 790 and 865 cm − 1 while symmetric and asymmetric bending are located at 1265 and 1409 cm − 1 . C-Si-C bending is found at 184 cm − 1 as a double band which is partially overlapped with a new band centred around 156 cm − 1 founded in hybrid materials with low crystallinity [15]. In Raman spectra of ormosils with hexane and iPrOH added, the 184 cm − 1 band acquire high intensity indicating the more ordered disposition of the atoms into the network while in the case of acetone and dichloromethane addition, the band associated with disordered structures acquire higher relevance.…”

Dielectric studies of segmental dynamics in poly(dimethylsiloxane)/titania nanocomposites

“…Complex melting peaks have been observed before in PDMS systems [18][19][20] and for the materials of the present work are still under investigation.…”

Modification of poly(dimethylsiloxane) as a basis for surface wrinkle formation: Chemical and mechanical characterization

“…Besides in the exposed areas the band appearing at 491 cm -1 shifts to higher wavenumbers (up to 493.5 cm -1 ) and broadens when increases the irradiation time while remains unchanged in the protected ones (Figure 2-a). This band is assigned to Si-O-Si skeletal deformation [45] and Si-O-Si symmetric stretching modes [41,43,44]. Equally, the band at 709 cm -1 in the exposed areas slightly shifts to lower wavenumbers when the UVO treatment duration increases.…”