The surface morphology of free-surface PCL ringed spherulites was investigated by using atomic force microscopy. The spherulites were obtained by crystallization of PCL/PVC blends of different compositions. It was fou...The surface morphology of free-surface PCL ringed spherulites was investigated by using atomic force microscopy. The spherulites were obtained by crystallization of PCL/PVC blends of different compositions. It was found that the ringed spherulite exhibited regularly fluctuating rings on its surface. Compared with the bright-dark ring pattern of the spherulite under a polarizing microscope, it was proved that the optical characteristics of the ringed spherulite under polarizing microscope coincided with its surface characteristics. The bright rings in polarizing micrographs of the spherulite coincided with the convex rings on its surface, while the dark rings coincided with the concave rings.展开更多
Lamellar structures of banded spherulites of poly(e-caprolactone)/poly(vinylchloride) (PCL/PVC) blends are observed using tapping mode atomic force microscopy (AFM). Thesurface of the PCL/PVC banded spherulites presen...Lamellar structures of banded spherulites of poly(e-caprolactone)/poly(vinylchloride) (PCL/PVC) blends are observed using tapping mode atomic force microscopy (AFM). Thesurface of the PCL/PVC banded spherulites presents to be concentric periodic ups and downs. Theperiod of the bands corresponds to the extinction rings under the polarized optical microscopyobservation. The lamellae with edge-on orientation in the ridges and the flat-on lamellae in thevalleys of the banded spherulites are observed clearly. The twisting between the edge-on and flat-onlamellae is also observed.展开更多
基金This work was supported by The National Natural Science Foundation of China and also The State Science and Technology Commission of China under The National Key Project for Fundamental Research "Macromolecular Condensed State".
文摘The surface morphology of free-surface PCL ringed spherulites was investigated by using atomic force microscopy. The spherulites were obtained by crystallization of PCL/PVC blends of different compositions. It was found that the ringed spherulite exhibited regularly fluctuating rings on its surface. Compared with the bright-dark ring pattern of the spherulite under a polarizing microscope, it was proved that the optical characteristics of the ringed spherulite under polarizing microscope coincided with its surface characteristics. The bright rings in polarizing micrographs of the spherulite coincided with the convex rings on its surface, while the dark rings coincided with the concave rings.
基金supported by the National Natural Science Foundation of China(Grant Nos.20174049 and 20131160730)
文摘Lamellar structures of banded spherulites of poly(e-caprolactone)/poly(vinylchloride) (PCL/PVC) blends are observed using tapping mode atomic force microscopy (AFM). Thesurface of the PCL/PVC banded spherulites presents to be concentric periodic ups and downs. Theperiod of the bands corresponds to the extinction rings under the polarized optical microscopyobservation. The lamellae with edge-on orientation in the ridges and the flat-on lamellae in thevalleys of the banded spherulites are observed clearly. The twisting between the edge-on and flat-onlamellae is also observed.
