Vpliv stopnje zamreženja na karakteristike kapacitivnega polimernega senzorja relativne vlažnosti zraka
The effect of the degree of cross-linking on the characteristics of a polymer capacitive-type sensor

slovenian

2000

volume 34, issue 5

Inštitut za kovinske materiale in tehnologije
(Obvezni izvod spletne publikacije)

A cross-linked polymer film was prepared on a glass substrate by using the photo-irradiation technique and evaluated as a capacity-type humidity sensor. The sensing characteristic were considerably affected by the degree of cross-linking in the film. The sensitivity was enhanced with up to 95% cross-linking, beyond this the sensitivity decreased. This has been explained by the variation in the ability to absorb water with the degree of cross-linking. Similar behaviour was observed for the vapours on the adsorption of the sandwich-cermet (insulator-gold-insulator) type devices prepared with the thin gold metal film as an upper electrode which was deposited by vacuum evaporation. The behaviour was explained by the segment motion of the main chain and the side chain. If the cross-linking reaction proceeds and the film becomes rigid, the segment motion of the main chain is depresssed. As a result, the value of the dielectric loss decreases.

16.09.2009