Accession Number : AD0616757

Title :   NEOPRENE ELASTOMERS FOR BALLOON FABRICATION.

Descriptive Note : Final rept. for 1 Mar 64-28 Feb 65,

Corporate Author : KAYSAM CORP OF AMERICA PATERSON N J

Personal Author(s) : Nelson,Eric

Report Date : 28 FEB 1965

Pagination or Media Count : 137

Abstract : Dry neoprene polymers can be successfully evaluated for meteorological balloon purposes by using a solution dipping technique. This is of considerable value since it provides a method of determining suitability of polymers for balloons without first producing them in latex form. Evaluation of neoprene latex LD-569 revealed interesting physical properties, but difficulty was encountered in producing balloons from it. Study of antioxidants resulted in development of a compound with superior resistance to heat and oxygen aging. Several filter media for latex compounds were evaluated. No evidence was obtained that improvement in balloon uniformity could be obtained. Photomicrographic examination of compounding ingredients and balloon films show little evidence that improperly dispersed solid material can act as a point of weakness, but did show how easily the balloon film can suffer surface damage by abrasion. Evidence was obtained that strongly suggests that better flight performance can be expected if balloons are cured at lower temperatures than those that produce optimum laboratory physical characteristics. Excellent flight performance was obtained with balloons made from a high elongation compound. Altitudes up to 140,000 feet were obtained on a dependable basis. (Author)

Descriptors :   (*SYNTHETIC RUBBER, METEOROLOGICAL BALLOONS), (*METEOROLOGICAL BALLOONS, SYNTHETIC RUBBER), AGING(MATERIALS), DEGRADATION, PERFORMANCE(ENGINEERING), FILMS, POLYMERS, FLIGHT TESTING

Distribution Statement : APPROVED FOR PUBLIC RELEASE