The FTTR spectra of the PET and DEA are given in Fig.
The FTTR spectra of depolymerization products (WIF) are also given in Fig.
As evidenced by FTTR
analysis in the previous section, formation of CP-grafted-PA 6 copolymers through the reaction of carboxyl groups of CP with the amine groups of PA 6 molecules was found during the preparation of MPA resins.
The functional groups of the copolymers were investigated by Fourier transform infrared spectroscopy (FTTR
model Nicolet Impact 410) using a KBr pellet method with 32 scans and 4 [cm.sup.-1] resolution.
spectra of the diolPOSS, the pristine PU, and PU-diolPOSS hybrids are shown in Fig.
Diurethanes were characterized by differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTTR
), and thermogravimetric analysis (TGA).
A Fourier-transform infrared (FTTR
) spectrophotometer (JASCO 300E) equipped with attenuated total reflectance capability was used to take infrared spectra of the SMPU samples.
The structure of Xylok prepolymer was characterized by [.sup.1]H NMR and Fourier transform infrared spectroscopy (FTTR
has numerous applications in qualitative and quantitative analysis.
spectra of dried nanoparticles are shown in Fig.
According to previous studies (2), (21), (27), (30) and the FTTR
analysis results, it has been proved that the active-OH groups of APT can react and crosslink with polymeric chains, and can participate in the construction of three-dimensional hydrophilic network.