Surface Interactions at the Phase Interface in the Boron Oxide–Polypropylene System

The interphase interaction of highly dispersed boron oxide (99.3% of B11) in a polypropylene matrix has been investigated by IR spectroscopy. In the region of absorption of hydroxyl groups, maxima at 3500 and 3340 cm−1 had been detected, which were assigned to the surface OH groups which interact with the polymer matrix and which respectively are bound with the trigonally and tetrahedrally coordinated boron atoms.