Effect of CO 2  on crystallization kinetics of poly(ethylene terephthalate) | Zendy

Takada Mitsuko | Zendy; Ohshima Masahiro | Zendy

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Effect of CO 2 on crystallization kinetics of poly(ethylene terephthalate)

Author(s) -

Takada Mitsuko,

Ohshima Masahiro

Publication year - 2003

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.10039

Subject(s) - crystallization , materials science , differential scanning calorimetry , ethylene , isothermal process , kinetics , poly ethylene , glass transition , thermodynamics , polymer , avrami equation , polymer chemistry , chemical engineering , analytical chemistry (journal) , crystallization of polymers , composite material , organic chemistry , chemistry , catalysis , quantum mechanics , engineering , physics

The effect of CO 2 on the isothermal crystallization kinetics of poly(ethylene terephthalate), PET, was investigated using a high‐pressure differential scanning calorimeter (DSC), which performed calorimetric measurements while keeping the polymer in contact with presurized CO 2 . It was found that the crystallization rate followed the Avrami equation with values of the crystallization kinetic constant dependent on the crystallization temperature and concentration of CO 2 in PET. The presence of CO 2 in the PET increased its overall crystallization rate. CO 2 also decreased the glass transition temperature, T g , and the melting temperature, T m . As a result, the observed changes in crystallization rate caused by CO 2 can be qualitatively predicted from the magnitude of T g depression and that of the equilibrium melting temperature, T m 0 .

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