Accession Number : AD0638599

Title :   TERMITE RESISTANCE OF POLYVINYL CHLORIDE PLASTICS.

Descriptive Note : Memorandum rept.

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Bultman,J. D. ; Leonard,J. M. ; Southwell,C. R.

Report Date : 20 JUN 1966

Pagination or Media Count : 11

Abstract : A project for determining the nature of termite attack upon polymeric materials is in progress. Thirty-two formulations containing polyvinyl chloride resin were prepared incorporating, variously, four plasticizers, three insecticides and two degrees of hardness. After 14 months' exposure in the Panamanian jungle only 21 specimens showed evidence of termite attack, ranging from very slight to heavy. Of these, 14 specimens were composed of formulations containing no insecticide. By chi square test, insecticide has been shown to be significant in influencing attack distribution. Specimens containing dioctyl phthalate plasticizer showed the highest incidence of attack; those containing tricresyl phosphate fortified with the ortho isomer, the lowest. Some specimens shrank on their supporting dowels. The plasticizer may be a factor, since 40% of those containing dioctyl adipate shrank; only 3% of those containing other plasticizers did so. (Author)

Descriptors :   (*VINYL PLASTICS, *INSECT REPELLENTS), (*ISOPTERA, VINYL PLASTICS), POLYVINYL CHLORIDE

Subject Categories : Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE