Abstract
AbstractHybrid films made of isotactic polypropylene (PP) and silica (SiO2) are produced in a single‐screw extruder, followed by uniaxial orientation induced by winding at different speeds. Aiming their application in packaging, the influence of uniaxial orientation on properties of films containing pure (A200) and modified (R972, modified with dimethylchlorosilane) silicas is studied. The microstructural changes of the PP are evaluated by x‐ray diffraction (XRD) and by differential scanning calorimetry (DSC) and these data are correlated to nuclear magnetic resonance in the time domain (NMR‐TD). The orientation given to the films is monitored by intensity alterations of the XRD peaks, which are influenced by the nanoparticle concentration and the affinity between PP/silica. Through the DSC analysis, the nucleating effect of silica A200 at a concentration of 1 wt% is evidenced. Finally, the NMR‐TD corroborated the previous results, showing an increase in the stiffness of the more oriented nanocomposites due to the alignment of polymer chains.
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
