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Nanocomposite based on polypropylene and octadecylamine-modified lamellar-zirconium phosphate (PP/nano-ZrPOct) was prepared by melt processing. The action of the nanofiller and screw speed on the properties were evaluated. SEM images revealed that at highest screw speed, the higher nano-ZrPOct dispersion was achieved. In WAXD diffractrograms, some nanofiller diffraction peaks disappeared and a new peak was observed at low angle. There was evidence of increase of thermal stability although only discrete increasing in initial degradation temperature has been noticed. Melting and crystallization temperatures were invariable but crystallinity degree was influenced with a decreasing behavior at highest screw speed. The results strongly evidenced that the intercalation of the PP chains inside the nano-ZrPOct galleries and some degree of delamination of the nanofiller platelets have been achieved.

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The influence of polycaprolactone (PCL) and nano titanium phosphate, pristine (TiP) and Jeffamine™ modified (JETiP), was investigated in composites derived from recycled polypropylene/polycaprolactone/titanium phosphate (PPr/PCL/TiP and PPr/PCL/JETiP). The TiP was synthesized and chemically modified with amine and the composite processed in a Haake rheometer. Improvement of PPr thermal stability was revealed. Reduction of PPr cooling crystallization temperature (9°C) and crystallinity degree (∼5–10%) were registered. Hydrogen nuclear magnetic resonance time domain revealed enhance of molecular mobility which was associated to the diminution of PPr crystallinity. The X-ray diffraction pattern of the composite PPr/PCL/JETiP did not show phosphate diffraction angle. It was understood as polymer intercalation into modified titanium phosphate galleries. At low temperature, the storage modulus increased by the presence of PCL and phosphates evidencing reinforcement. Both PPr/PCL/TiP and PPr/PCL/JETiP composites yielded phase separation systems revealed by two peaks in the loss modulus curves. Also, the high PPr participation effectiveness degree on the PCL-rich phase was understood as owing to the interaction between PCL and phosphates.

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