Thermal and Morphological Assessment of the Penta-Layered, Hybrid U-Polyester Composite Reinforced with Glass Fibers and Polypropylene

Figure 4

FTIR spectra of (a) pure polypropylene (PP) and (b) glass fiber at the frequency region of 500 cm⁻¹–4000 cm⁻¹.

(a)

(b)