The amino-functionalized carbon nanotubes were introduced into the microwave-assistant ring-open polymerization of caprolactone monomer

and then produced carbon nanotube-modified polycaprolactone nanocomposites in-situ.Meanwhile

the grafted polycaprolactone chains formed on the surface of carbon nanotubes due to the initiating polymerization of the amino groups onto carbon nanotubes.The addition of amino-functionalized carbon nanotubes resulted in the significant enhancement of strength and modulus.In addition

the elongation was enhanced even when the content of amino-functionalized carbon nanotube was lower than 2%.Thereafter

the fractured structures

crystalline and thermal properties of nanocomposites were investigated by scanning electron microscope

X-ray diffraction

differential scanning calorimetry and dynamic mechanical analysis

respectively.Furthermore

the key role of amino-functionalized carbon nanotubes in enhancing mechanical performances was discussed.