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Crystal growth in poly(L-lactide) thin film revealed by in situ atomic force microscopy
被引:61
作者:
Kikkawa, Y
Abe, H
Fujita, M
Iwata, T
Inoue, Y
Doi, Y
机构:
[1] Tokyo Inst Technol, Dept Innovat & Engn Mat, Midori Ku, Yokohama, Kanagawa 2268502, Japan
[2] Japan Sci & Technol Corp, SORST Grp, Midori Ku, Yokohama, Kanagawa 2268502, Japan
[3] Riken Inst Phys & Chem Res, Polymer Chem Lab, Wako, Saitama 3510198, Japan
关键词:
atomic force microscopy;
crystal growth;
enzymatic degradation;
in situ observation;
poly(L-lactide);
D O I:
10.1002/macp.200350044
中图分类号:
O63 [高分子化学(高聚物)];
学科分类号:
070305 ;
080501 ;
081704 ;
摘要:
Direct visualization of crystal growth in poly(L-lactide) thin films was carried out by using a temperature-controlled atomic force microscopy (AFM). At the initial stage of crystallization, edge-on lamellar crystals have nucleated and elongated. Subsequently, the edge-on lamellar crystals showed S-shaped morphology and changed their orientation from edge-on manner to flat-on one. The curvature of edge-on lamellar crystal has been discussed in terms of inclination and distortion of polymer chains in the crystal. In addition, mechanism on the formation of flat-on crystal from edge-on lamellae was proposed as derivative growth on the basis of in situ AFM observation of crystal growth and enzymatic degradation.
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页码:1822 / 1831
页数:10
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