Influence of thermal degradation on the crystallization of poly(butylene terephthalate)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F24%3A63575798" target="_blank" >RIV/70883521:28110/24:63575798 - isvavai.cz</a>

Result on the web

<a href="http://www.expresspolymlett.com/search.php" target="_blank" >http://www.expresspolymlett.com/search.php</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3144/expresspolymlett.2024.22" target="_blank" >10.3144/expresspolymlett.2024.22</a>

Result language

angličtina

Original language name

Influence of thermal degradation on the crystallization of poly(butylene terephthalate)

Original language description

Our work reveals a notable shift in the crystallization temperature (Tc) of poly(butylene terephthalate) (PBT) at which crystallization occurs due to exposure to prolonged thermal degradation at 270°C in an environment of nitrogen gas. The initial Tc of 193°C undergoes a marked decrease, settling at 133°C, which signifies a considerable 60°C shift towards lower temperature ranges. This transition is discernible across three distinct degradation stages: an initial phase of increase, an intermediate phase characterized by a sharp decline, and a subsequent late stage of the degradation phase characterized by a more moderate decrease in Tc. Both crystallinity and crystallization kinetics consistently mirror this pattern, demonstrating an initial rise, a rapid subsequent drop, and a gradual decline in the late-stage period. Evident from the presence of two melting peaks, the research implies differing lamellar thicknesses. As the degradation progresses, the melting points of these peaks, denoted as Tm1 and Tm2, decline at 38 and 41°C, respectively. Validation of the degradation-induced changes is provided by a small angle X-ray scattering (SAXS), which corroborates the observed decrease in the long period (L). A contextualization of the results against prior studies underscores analogous trends in the alteration of crystallization behaviour consequent to degradation.

Czech name

—

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

2024

Confidentiality

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

Name of the periodical

Express Polymer Letters

ISSN

1788-618X

e-ISSN

—

Volume of the periodical

18

Issue of the periodical within the volume

3

Country of publishing house

HU - HUNGARY

Number of pages

17

Pages from-to

309-325

UT code for WoS article

001177645600003

EID of the result in the Scopus database

2-s2.0-85182483391