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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

CrystEngComm

ISSN

1466-8033

e-ISSN

—

Svazek periodika

25

Číslo periodika v rámci svazku

34

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

4848-4855

Kód UT WoS článku

001040460700001

EID výsledku v databázi Scopus

2-s2.0-85168611794