Detail publikace

Dielectric relaxation in hydroxyethyl cellulose

LIEDERMANN, K., LAPČÍK, L.

Originální název

Dielectric relaxation in hydroxyethyl cellulose

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova v angličtině

dielectric relaxation, hydroxyethyl cellulose, hydrogen bridges, molecular dynamics

Autoři

LIEDERMANN, K., LAPČÍK, L.

Rok RIV

2000

Vydáno

1. 1. 2000

ISSN

0144-8617

Periodikum

Carbohydrate Polymers

Ročník

42

Číslo

May

Stát

Spojené království Velké Británie a Severního Irska

Strany od

369

Strany do

374

Strany počet

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"
}