Exploitation of the hard/soft segments ratio in thermoplastic polyurethane (TPU) for the tuning of electrical and mechanical properties of expanded graphite (EG) based composites

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F19%3A00507000" target="_blank" >RIV/61389013:_____/19:00507000 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/content/pdf/10.1007%2Fs42452-019-0908-3.pdf" target="_blank" >https://link.springer.com/content/pdf/10.1007%2Fs42452-019-0908-3.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s42452-019-0908-3" target="_blank" >10.1007/s42452-019-0908-3</a>

Result language

angličtina

Original language name

Exploitation of the hard/soft segments ratio in thermoplastic polyurethane (TPU) for the tuning of electrical and mechanical properties of expanded graphite (EG) based composites

Original language description

Composite materials based on three kinds of commercial thermoplastic polyurethanes (TPUs) and electrically conductive expanded graphite (EG) were prepared by melt-mixing. The TPUs differed mainly in hard/soft segment ratio, resulting in different polarity and crystallinity. These parameters were exploited to prepare composite materials with different percolating path structure, whose characteristics were thoroughly analysed. Test specimens were prepared by compression moulding and their electrical, thermal and mechanical properties, as dependent on filler content, were analysed. The electrical behaviour was correlated to the morphologies. The results showed how EG promoted and modified the crystallization, resulting in enhanced hardness but reduced toughness of the material. Moreover, EG segregation was observed in the TPU with the highest HS content which already promoted percolating paths at EG concentration below 2 wt% (1.1 vol%) and showed a resistivity between 105 and 104 Ω cm, while in TPU with low crystallinity the percolation was shifted to above 4 wt% EG and the resistivity reached values slightly over 105 Ω cm at 8 and 10 wt% EG. These peculiarities enabled easy management of a broad range of industrial application such as antistatic coatings, mechanically reinforced insulators, and electrical conductive connectors using a few pristine materials.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project

<a href="/en/project/TE01020022" target="_blank" >TE01020022: Flexible printed microelectronics based on organic or hybrid materials, FLEXPRINT</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Name of the periodical

SN Applied Sciences

ISSN

2523-3963

e-ISSN

—

Volume of the periodical

1

Issue of the periodical within the volume

8

Country of publishing house

DE - GERMANY

Number of pages

10

Pages from-to

878

UT code for WoS article

000476622600002

EID of the result in the Scopus database

—