Document 65MVdR505wGa0n37LQ13RwwrE

UNION CARBIDE CORPORATION CHEMICALS AND PLASTICS be: M . U . Dei W. L.Carrick W. A. Fraser A.W. Naumann W. Thurbet/' RIVER ROAD, BOUND BROOK. N. J. 08805 TELEPHONE (201) 356-8000 / August 14, 1973 Dr. W. C. Streib, Director Johns-Manville Research & Development Center Denver Colorado 80217 Re: Chrysotile Asbestos Specimen Dear Dr. Streib: Thank you very much for sending us the sample of chrysotile asbestos ore. It is indeed a remarkable specimen having a vein of chrysotile fiber bundles nine inches long. I appreciate your going to the trouble of chiseling a piece off a prize specimen from your personal mineral collection! As we discussed, we need the extreme length of chrysotile fibers for a new test aimed at determining the fiber/matrix adhesion and the statistical fiber strength parameters for asbestos composites. This work is an outgrowth of some earlier work on glass fibers with different sizing/ coupling agent systems (see attached paper, page 3). We are in the process of further developing the technique shown in Figure 6 to the point where it may become a practical way of measuring the micromechanics parameters of composites directly. We recognize that it will be more difficult to do this with asbestos than with glass -- however, since so little is known in the case of asbestos we would like to give it a try. Again, thank you for your help in this matter. We will certainly keep you informed of any progress we may make. Sincerely, FHA/rch att. F. H . Ancker Senior Research Scientist R & D Department