Dielectric, structural and mechanical properties of thermally aged biaxially oriented polymeric substrates for flexible electronics

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F22%3A43964981" target="_blank" >RIV/49777513:23220/22:43964981 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0141391022000921" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0141391022000921</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.polymdegradstab.2022.109906" target="_blank" >10.1016/j.polymdegradstab.2022.109906</a>

Result language

angličtina

Original language name

Dielectric, structural and mechanical properties of thermally aged biaxially oriented polymeric substrates for flexible electronics

Original language description

Two materials, polyethylene naphthalate (PEN) and polyethylene terephthalate (PET), which are often used as flexible substrates for electronics, were exposed to accelerated thermal aging at temperatures of 190 °C and 210 °C for 50 0 0 and 20 0 0 h, respectively. Changes in their thermal, dielectric, and me- chanical properties were investigated. The results revealed that dielectric losses increase slower for PET than for PEN at lower aging temperatures. In contrast, at higher aging temperatures, similar behavior was observed for both materials. During aging, the dissipation factors of PET and PEN increased by one order of magnitude over those of the original states. The dielectric frequency-temperature characteristics obtained by broadband dielectric spectroscopy (BDS) shifted and indicated changes in the individual di- electric relaxation mechanisms (i.e., α, β, β∗). Discoloration induced by thermal aging and quantified by ultraviolet–visible spectroscopy by the peak at 453 nm was detected primarily in the spectrum of PEN. The mechanical tensile strength of PET deteriorated considerably (10 times) after only a few hundred hours, whereas PEN was stable after even longer exposure times. It was found that all of the changes mentioned above are primarily related to the change in the crystalline-to-amorphous phase ratio, as demonstrated by differential scanning calorimetry (DSC) and supported by density measurements.

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

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OECD FORD branch

20201 - Electrical and electronic engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

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

Name of the periodical

POLYMER DEGRADATION AND STABILITY

ISSN

0141-3910

e-ISSN

1873-2321

Volume of the periodical

199

Issue of the periodical within the volume

May 2022

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

1-10

UT code for WoS article

000791619300001

EID of the result in the Scopus database

2-s2.0-85127113721