Published May 19, 1999 | Version v1
Report Restricted

Effect of Hydroxyl Concentration on Chemical Sensitivity of Polyvinyl Alcohol/Carbon-Black Composite Chemiresistors

Creators

Description

The sensitivity and selectivity of polyvinyl alcohol (PVA) / carbon black composite films have been found to vary depending upon the hydroxylation percentage (''-OH'') of the polymer. These chemiresistors made from PVA films whose polymer backbone is 88% hydroxylated (PVA88) have a high sensitivity to water, while chemiresistors made from PVA75 have a higher sensitivity to methanol. The minor differences in polymer composition result in films with different Hildebrand volubility parameters. The relative responses of several different PVA-based chemiresistors to solvents with different volubility parameters are presented. In addition, polyvinyl acetate (PVAC) films with PVA88 are used in an array to distinguish the responses to methanol-water mixtures

Availability note (English)

Available from INIS in electronic form; ALSO AVAILABLE FROM OSTI AS DE00007259; NTIS; US GOVT. PRINTING OFFICE DEP.

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Additional details

Publishing Information

Imprint Pagination
8 p.
Report number
SAND--99-1260C

Conference

Title
196. Meeting of the Electrochemical Society
Dates
17-22 Oct 1999
Place
Honolulu, HI (United States)

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
30048110
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
CARBON BLACK; CHEMICAL ANALYSIS; COMPOSITE MATERIALS; CONCENTRATION RATIO; FILMS; HYDROXYL RADICALS; MEASURING INSTRUMENTS; PVA; TRANSDUCERS
Descriptors DEC
ALCOHOLS; CARBON; ELEMENTS; HYDROXY COMPOUNDS; MATERIALS; NONMETALS; ORGANIC COMPOUNDS; ORGANIC POLYMERS; POLYMERS; POLYVINYLS; RADICALS

Optional Information

Contract/Grant/Project number
Contract AC04-94AL85000
Funding organization
USDOE (United States)