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Citation: Shen Yu, Yang Decai, Feng Zhiliu. INVESTIGATION OF EPITAXIAL CRYSTALLIZATION OF α-iPP[J]. Chinese Journal of Applied Chemistry, ;1990, 7(2): 49-53. shu

INVESTIGATION OF EPITAXIAL CRYSTALLIZATION OF α-iPP

1.
Laboratory of Polymer Physics, Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022

Received Date: 13 April 1989
Available Online: 24 July 1989
Fund Project:

The microstructure of α-iPP films prepared by solution-casting on glycerol and crystal-lized at different temperature was investigated by means of defocused electron microscopy and electron diffraction techniques. Microscopic observation showed that all the samples consis-ted of two kinds of structures:cross-hatched and single-crystal-type structure, independent of crystallization temperature. In the cross-hatched structure, as a result of epitaxial cry-stallization, there existed wide-angle and low-angle branchings of lamellae seen edge-on. The characteristics of the former branching were accounted for by the way of epitaxial gro-wth of daughter lamellae on the lateral face(010) of parent lamellae substrate, while the later was explained in this paper by the theory of branching of individual dominant lamel-lae proposed by Bassett and Olley.
- polypropylene,
- morphological structate,
- epitaxial crystallization
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