Accession Number : AD0291504

Title :   SORPTION OF WATER IN POLYMERIC MATERIALS

Corporate Author : ARMY ELECTRONICS LABS FORT MONMOUTH N J

Personal Author(s) : LAUTTMAN,ROBERT G. ; STEIN,MARVIN N.

Report Date : NOV 1962

Pagination or Media Count : 1

Abstract : The dielectric properties of long chain polymers are markedly affected by hydrogen bonding solutes absorbed within the structure. The moisture content of Nylon 66, Nylon 610, and Mylar was measured as a function of vacuum desiccation at room temperature, vacuum heating and non-vacuum heating over a wide range of temperatures, rate of absorption measurements, quenching processes,AND RESIDUE ANALYSIS. These studies have indicated that two different processes are involved in the sorption of water by these polymers, namely, the normal type absorption characterized by weakly bonded water and the molecular absorption characterized by strongly bonded water. A thermal threshold was observed beyond which the latter t pe of absorption decreases rapidly. The rate of absorption as a function of the amorphous fraction was determined by the measurement of quenched and unquenched samples. The results were interpreted as necessary consequences of the nature of the structure and interchain bonding of these polymers. (Author)

Descriptors :   *ABSORPTION, *POLYMERS, BONDING, NYLON, TEMPERATURE, VACUUM APPARATUS, WATER

Distribution Statement : APPROVED FOR PUBLIC RELEASE