Accession Number : AD0731188

Title :   Development of Elastomers Having Low Water-Vapor Transmission Rate.

Descriptive Note : Technical rept.,

Corporate Author : ARMY WEAPONS COMMAND ROCK ISLAND ILL RESEARCH DEVELOPMENT AND ENGINEERING DIRECTORATE

Personal Author(s) : Williams,John A.

Report Date : AUG 1971

Pagination or Media Count : 21

Abstract : The effect of various types of fillers on the water vapor transmission rate (WVTR) of vulcanizates of EPR was determined. Carbon black and most nonblack fillers produced only a small reduction in the WVTR, whereas platelike mica fillers produced significant reductions. High-density polyethylene reduced the WVTR, but physical properties were adversely effected. EPR/butyl rubber blends containing 50 pphr of carbon black produced vulcanizates with good physical properties and low permeability to moisture. (Author, modified-PL)

Descriptors :   (*ELASTOMERS, PERMEABILITY), (*SYNTHETIC RUBBER, PERMEABILITY), (*VULCANIZATES, PERMEABILITY), BUTYL RUBBER, COMPOSITE MATERIALS, WATER VAPOR, CARBON BLACK, MOISTURE, MICA

Subject Categories : Elastomers and Rubber

Distribution Statement : APPROVED FOR PUBLIC RELEASE