Crosslinked Poly(2-oxazoline)s as “Green” Materials for Electronic Applications

Crosslinked Poly(2-oxazoline)s as “Green” Materials for Electronic Applications

Fimberger, M.
Tsekmes, I.A.
Kochetov, R.
Smit, J.J.
Wiesbrock, F.

Electrical Engineering, Mathematics and Computer Science

2015-12-30

Poly(2-nonyl-2-oxazoline)80-stat-poly(2-dec-9?-enyl-2-oxazoline)20 and poly(2-dec-9?-enyl-2-oxazoline)100 can be synthesized from the cationic ring-opening polymerization of monomers that can be derived from fatty acids from renewable resources. These (co)poly(2-oxazoline)s can be crosslinked with di- and trifunctional mercapto compounds using the UV-induced thiol-ene reaction. The complex permittivity of the corresponding networks increases with the temperature and decreases with the network density. In a frequency range from 10?2 to 106 Hz and at temperatures ranging from ?20 to 40 °C, the changes of the real part of the complex permittivity as well as the loss factor can be explained by interfacial polarization within the material. At a temperature of 20 °C and a frequency of 50 Hz, the permittivity of the crosslinked (co)poly(2-oxazoline)s covers a range from 4.29 to 4.97, and the loss factors are in the range from 0.030 to 0.093. The electrical conductivities of these polymer networks span a range from 5 × 10?12 to 8 × 10?9 S/m, classifying these materials as medium insulators. Notably, the values for the permittivity, loss factor and conductivity of these copoly(2-oxazoline)s are in the same range as for polyamides, and, hence, these copoly(2-oxazoline)-based networks may be referred to as “green” alternatives for polyamides as insulators in electronic applications.

poly(2-oxazoline)s
crosslinked polymers
thiol-ene click chemistry
permittivity
loss factor
interfacial polarization
electrical conductivity

http://resolver.tudelft.nl/uuid:6ac64ab7-73a8-4b91-90b1-b1632f960ad9

MDPI

2073-4360

https://doi.org/10.3390/polym8010006

Polymers, 8 (1), 2016

Institutional Repository

journal article

(c) 2015 The Author(s)
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