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Citation: Chen Ye, Yang Decai. EFFECT OF HIGH-RATE HEATING ON THE CRYSTALLIZATION OF GLASS STATE POLY(VINYLIDENE FLUORIDE)[J]. Chinese Journal of Applied Chemistry, ;1990, 7(3): 60-63. shu

EFFECT OF HIGH-RATE HEATING ON THE CRYSTALLIZATION OF GLASS STATE POLY(VINYLIDENE FLUORIDE)

Chen Ye ,
Yang Decai

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

Received Date: 6 April 1989
Available Online: 19 August 1989
Fund Project:

Crystalline polymorphs from the glass state of poly (vinylidene fluoride)(PVF₂) induced by high-rate heating have been studied by FTIR and TEM. The glass state PVF₂ sample was obtained by ultraquenching the thin films into liquid nitrogen. Three kinds of poly-morphs were formed when the sample was heated very quickly to higher temperatures with subsequent isothermal crystallization. High-rate warming the glass to the temperatures below 30℃ results in formation of β phase microcrystals. When the glass is heated very quickly to 150℃ predominantly the α phase lamellae or spherulites were obtained, while at temp-eratures of 40-70℃,the β phase and α phase coexisted. If the temperature of high-rate heating was upto 165℃, the perfect spherulites of γ phase PVF₂ were observed.
- poly(vinylidene fluoride),
- glass state,
- high-rate heating,
- polymorphs
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