Unclassified 



SECURITY CLAS51FIC* 



REPORT DOCUMENTATION PAGE 



REPORT NUM 



TN-1402 



2. GOVT ACCESSION 



DN544144 



4. TITLE r"""* Sijbn:le) 



DURABILITY OF PLASTICS IN ANAEROBIC 



MARINE SEDIMENTS 



5, TYPE OF REPORT & PERIOD COVERED 



Final; 1 Jul 1972-31 Jun 1975 



PERFORMING ORG. REPOR 



J. S. Muraoka and H. P. Vind 



9. PERFORMING ORGA 



■JD ADDRESS 



CIVIL ENGINEERING LABORATORY 

 Naval Construction Battalion Center 

 Port Hueneme, California 93043 



62755N; 

 YF54.543.007.01.001 



-ID ADDRESS 



Naval Facilities Engineering Command 

 Alexandria, Virginia 22332 



12. REPORT DATE 



October 1975 



14 



,«BER OF PAGES 



U. MONITORING AGENCY N « 



ADDRESSrf/ dille 



u.,nme Office) 



Unclassified 



IS. DISTRIBUTION STATEMENT fu/ this Report 



Approved for public release; distribution unlimited. 



DISTRIBUTION STATEMENT for 



0. if dUferenI front Repar:) 



<EY WORDS rConfi 



Durability, plastics, deterioration of materials, marine environment, hydrogen sulfide, harbor 

 mud, electric cable, rubber, rope. 



Specimens of a wide variety of plastic sheets, ropes, and electrical cable insulations 

 were partially buried in anaerobic harbor sediments to determine the effect of hydrogen 

 sulfide on polymeric materials. For comparison, specimens of the same materials were 

 exposed in aerobic surface waters. After 2-1/2 years, the specimens were all recovered. 

 Very little change was noted in the appearance, strength, or hardness of any of the 

 specimens of synthetic polymeric materials. In contrast, nothing remained of samples 



DD 



1473 



>JOV S5 IS 0B50L ETE 



continued 



Unclassified 



SECURITY CLASSIFICATION OF 



MBL/WHOI 



Q3D1 DDMD21D 3 



