Abstract
Aiming to unveil the key structures and processing parameters of precursor film for the micropore formation, the structure and mechanical behavior of isotactic polypropylene (iPP) casting films prepared at different processing conditions are systematically studied with small and wide angle X-ray scattering measurements as well as tensile analysis. Draw ratio and cast roll temperature are found to be the key processing parameters, which determine orientation of lamellar stack and thickness of lamellar as well as amorphous layers, respectively. Furthermore, these two important structural parameters, the orientation of lamellar stack and the thickness of amorphous layer, show positive correlations with the formation of micropores. Considering coupling effects of tight folds and lamellar-fibrillar or lamellar-amorphous transformation, a semi-quantitative deformation model for the micropore formation is proposed to correlate surface porosity and elastic recovery rate with structural parameters of precursor film.
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.
