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DSC studies on the crystallization characteristics of poly(ethylene terephthalate) for blow molding applications
Author(s) -
Fann DawMing,
Huang Steve K.,
Lee JiunnYih
Publication year - 1998
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10187
Subject(s) - crystallinity , materials science , crystallization , nucleation , isothermal process , blow molding , avrami equation , crystallization of polymers , ethylene , composite material , chemical engineering , thermodynamics , organic chemistry , chemistry , mold , physics , engineering , catalysis
The crystallization behavior of blow‐molded PET bottles, which helps determine the product's transparency, was investigated by DSC dynamic cooling experiments that simulated the cooling that occurs in the injection blow‐molding manufacturing process. Dynamic cooling crystallization of PET optimized the conditions for keeping crystallinity to a minimum during the production of PET bottles. The kinetic parameters of non‐isothermal crystallization behavior were determined, which indicate that the competing processes of nucleation and the growth of PET spherulites during the cooling process are the controlling factors for the degree of crystallinity in the final product. In addition, DSC measurements were employed to obtain information on related aspects, such as the ease of crystallization from glassy and molten states and the crystallinity in the products. An Avrami equation was used for the calculations of the crystallization kinetic parameters.