Abstract
Microporous polyvinyl chloride (PVC) with pore size of0.2–2 µm has been obtained by the foaming of PVC powders using a solution of2,2′-azo-bis-iso-butyronitrile in a co-solvent of butanone and cyclohexanone. ThePVC/CaCO3 hybrid powdersdeposited with CaCO3 nanoparticles have been synthesized using the microporous PVC as reactors ofCaCO3 nanoparticles,i.e., the reaction of Ca(OH)2 with CO2 occurs inside the pore of microporous PVC. The insitu PVC/CaCO3 nanocomposites have been prepared by melt blending insitu PVC/CaCO3 hybrid powders. The images of SEM and TEM show that the insitu CaCO3 nanoparticles are uniformly dispersed in the PVC matrix and the sizes of theCaCO3 nanoparticles are less than 50 nm. TEM images and XRD patterns for the insitu CaCO3 strongly suggest that pseudo-amorphous crystals and defect-rich crystals areformed. The mechanical properties and DMA data indicate that the insitu PVC/CaCO3 nanocomposites exhibit much higher strength, toughness, modulus and glass temperature than commonPVC/CaCO3 nanocomposites. This novel nanotechnology has potential applications in preparation oforganic–inorganic hybrid nanocomposites.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call