Initial crystallization mechanism of isotactic polystyrene from different States.
The isothermal crystallization processes of isotactic polystyrene at 160 degrees C from different initial states (quenched glassy state and melt state), i.e., cold- and melt-crystallization processes, have been investigated by infrared (IR) and generalized two-dimensional (2D) IR correlation spectroscopy. It has been found that not only the crystallization kinetics and crystallinity but also the sequential changes of the amorphous and crystalline sensitive bands are quite different for the cold- and melt-crystallization processes. This leads to the conclusion that the physical origins for spinodal decomposition prior to polymer crystallization may be different for different crystallization processes.
Zhang
Jianming
J
Department of Chemistry, School of Science and Technology, Research Center for Environment Friendly Polymers, Kwansei-Gakuin University, Gakuen, Sanda 669-1337, Japan.
Duan
Yongxin
Y
Sato
Harumi
H
Shen
Deyan
D
Yan
Shouke
S
Noda
Isao
I
Ozaki
Yukihiro
Y