Publication detail

Dielectric relaxation in hydroxyethyl cellulose

LIEDERMANN, K., LAPČÍK, L.

Original Title

Dielectric relaxation in hydroxyethyl cellulose

Type

journal article in Web of Science

Language

English

Original Abstract

This paper presents the results of the dielectric analysis of hydroxyethyl cellulose (HEC) in the temperature range 100-350 K and in the frequency range 20 Hz - 1 MHz. The results show a distinct broad relaxation process in the temperature range 150-250 K with activation energy of about 33.4 MJ/kmol. The strength of the relaxation increases only slightly with temperature and the apparent increase of the height of the relaxation maximum is attributed to an increase of the co-operativity parameter. This increase is interpreted as decrease of the co-operativity of dipole motions with increasing temperature. The origin of relaxation is ascribed to the reorientation of double ethylene oxide groups or part of these.

Key words in English

dielectric relaxation, hydroxyethyl cellulose, hydrogen bridges, molecular dynamics

Authors

LIEDERMANN, K., LAPČÍK, L.

RIV year

2000

Released

1. 1. 2000

ISBN

0144-8617

Periodical

Carbohydrate Polymers

Year of study

42

Number

May

State

United Kingdom of Great Britain and Northern Ireland

Pages from

369

Pages to

374

Pages count

6

BibTex

@article{BUT39314,
  author="Karel {Liedermann} and Lubomír {Lapčík}",
  title="Dielectric relaxation in hydroxyethyl cellulose",
  journal="Carbohydrate Polymers",
  year="2000",
  volume="42",
  number="May",
  pages="369--374",
  doi="10.1016/S0144-8617(99)00189-7",
  issn="0144-8617"
}