Effect of fusion temperature on the crystallization kinetics of poly(butylene terephthalate)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F23%3A63569419" target="_blank" >RIV/70883521:28110/23:63569419 - isvavai.cz</a>

Result on the web

<a href="https://pubs.rsc.org/en/content/articlelanding/2023/ce/d3ce00669g" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2023/ce/d3ce00669g</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d3ce00669g" target="_blank" >10.1039/d3ce00669g</a>

Result language

angličtina

Original language name

Effect of fusion temperature on the crystallization kinetics of poly(butylene terephthalate)

Original language description

A tremendous effect of fusion temperature on the crystallization kinetics of poly(butylene terephthalate) (PBT) was discovered. The crystallization peak shifted by 22 °C towards lower temperatures, and the kinetics changed about ten times. Nonisothermal crystallization experiments revealed that an increase in fusion temperature led to a noticeable shift in the heat flow curve towards lower temperatures, indicating a significant change in the number of nucleation centres. This shift was observed within the temperature range of 232 °C to 246 °C, beyond which the heat flow curve stabilized. The analysis of relative crystallinity showed a decrease in crystallinity with increasing fusion temperature up to 246 °C, accompanied by a shift of the S-curve towards lower temperatures. Detailed analysis revealed that the peak position of the heat flow curve decreased significantly from 232 to 240 °C and then continued to decrease slightly until 246 °C, and then in the range 246-260 °C, it remained constant. The influence of cooling rate on relative crystallinity was also investigated, revealing that faster cooling rates shifted the relative crystallinity curve towards lower temperatures. The Ozawa model was linear and demonstrated the significant effect of the cooling rate (for 15, 20 and 25 °C min−1) on the nonisothermal crystallization kinetics. The Avrami model is perfectly implemented to evaluate the isothermal crystallization kinetics. Isothermal crystallization experiments confirmed the trends observed in the nonisothermal experiments, with the fastest crystallization occurring at lower fusion temperatures. During the isothermal crystallization experiment, the kinetics gradually decreased in the fusion temperature range 232-242 °C, and then in the range 242-250 °C, it remained constant. Overall, the study provides insights into the crystallization behaviour of PBT at different fusion temperatures and cooling rates.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10404 - Polymer science

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

CrystEngComm

ISSN

1466-8033

e-ISSN

—

Volume of the periodical

25

Issue of the periodical within the volume

34

Country of publishing house

GB - UNITED KINGDOM

Number of pages

8

Pages from-to

4848-4855

UT code for WoS article

001040460700001

EID of the result in the Scopus database

2-s2.0-85168611794