Branched poly（ε-capmlactone） was synthesized by self-condensing atom transfer radical polymerization of macroinimer, α-acryloyoxy-ω-2-bromopropionyloxy poly（ε-caprolactone）, which was prepared by enzyme-cataly...Branched poly（ε-capmlactone） was synthesized by self-condensing atom transfer radical polymerization of macroinimer, α-acryloyoxy-ω-2-bromopropionyloxy poly（ε-caprolactone）, which was prepared by enzyme-catalyzed ring-opening polymerization of ε-caprolactone with 2-hydroxylethyl acrylate as initiator and esterification of the ω-hydroxyl group of the obtained poly（ε-caprolactone） by 2-bromopropionyl bromide.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
文摘Branched poly（ε-capmlactone） was synthesized by self-condensing atom transfer radical polymerization of macroinimer, α-acryloyoxy-ω-2-bromopropionyloxy poly（ε-caprolactone）, which was prepared by enzyme-catalyzed ring-opening polymerization of ε-caprolactone with 2-hydroxylethyl acrylate as initiator and esterification of the ω-hydroxyl group of the obtained poly（ε-caprolactone） by 2-bromopropionyl bromide.
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.
