Crystallization kinetics of poly(trimethylene terephthalate)

The bulk isothermal crystallization kinetics of poly(trimethylene terephthalate) (PTT) was studied using a differential scanning calorimeter. Avrami's theory was used to analyze the data. Based on crystallinity growth rate, Avrami rate constant, K, and crystallization half‐time, PTT's crys...

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Bibliographic Details
Published in:Polymer engineering and science 2001-02, Vol.41 (2), p.308-313
Main Author: Chuah, Hoe H.
Format: Article
Language:English
Subjects:
Applied sciences
Calorimetry
Crystalline polymers
Crystallization
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polyesters
Properties and characterization
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Summary:The bulk isothermal crystallization kinetics of poly(trimethylene terephthalate) (PTT) was studied using a differential scanning calorimeter. Avrami's theory was used to analyze the data. Based on crystallinity growth rate, Avrami rate constant, K, and crystallization half‐time, PTT's crystallization rate is between those of poly(butylene terephthalate) (PBT) and poly(ethylene terephthalate) (PET) when compared at the same degree of undercooling. PBT has the highest crystallization rate with K in the order of 10−2 to 10−1 min−n. It is about an order of magnitude faster than PTT at 10−3 to 10−2 min−n, which in turn is an order of magnitude faster than PET with K of 10−4 to 10−2 min−n. Contrary to previous reports (PTT was not included in the study) that aromatic polyesters with odd numbers of methylene units were more difficult to crystallize than the even‐numbered polyesters, PTT did not fit in the prediction and did not follow the odd‐even effect.
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.10730