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Citation: Shen Yu, Yang Decai, Feng Zhiliu. THE INFLUENCE OF THERMAL TREATMENT ON EPITAXIAL CRYSTALLIZATION IN HDPE/iPP BLENDS[J]. Chinese Journal of Applied Chemistry, ;1990, 7(3): 33-38. shu

THE INFLUENCE OF THERMAL TREATMENT ON EPITAXIAL CRYSTALLIZATION IN HDPE/iPP BLENDS

1.
Changchum Institute of Applied Chemistry, Academia Sinica, Changchun 130022

Received Date: 22 June 1989
Available Online: 15 September 1989

A study of the effect of thermal treatment on epitaxial crystallization in HDPE/iPP blends was carried out by means of TEM and specimen tilt technique of electron microscopy. When the solution-cast films of HDPE/iPP blends were heated to above the melting point of HDPE(145℃) for about 30 min., and subsequently cooled to room temperature, the size of the recrystallized lamellae of HDPE increased in both regions of the cross-hatched and single-crystal-type structure of iPP. However, the epitaxial and structural relationships between HDPE and iPP remained unchanged. Under the heat treatment of higher temperature (194℃,20 min.), the morphologies and structures of recrystallized HDPE and iPP in the blend were similar to that of the blend heat-treated at lower temperature(145℃).
- polypropylene,
- polyethylene,
- blend,
- epitaxial crystallization,
- morphological structure
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