In PVA/silica, all the small peaks of PVA
disappeared and the large semi-crystalline peak became narrow
while maintaining its peak position at 2θ=19.54 (d=4.54 Å)
because the hydroxyl groups ofPVA molecules interact with
the silica species (Figure 3(b)).
disappeared
large
became
narrow
while
maintaining
peak
position
interact
species