National Institute of Standards & Technology, Acquisition & Assistance Div.,100 Bureau Drive Stop 3572, Bldg. 301, Rm B117, Gaithersburg, MD 20899-3572

B -- STOCHASTIC MODELS FOR CUMULATIVE DAMAGE FROM HYDROLYSIS AND UV-PHOTODEGRADATION FITTED TO NIST'S LABORATORY DATA SOL 53SBNB967068 DUE 060799 POC Diane M. Loeb (301) 975-6399, FAX (301) 963-7732, or e-mail: dloeb@nist.gov WEB: NIST Contracts Homepage, http://www.nist.gov/admin/od/contract/contract.htm. E-MAIL: NIST Contracts Office, Contract@nist.gov. The National Institute of Standards and Technology (NIST) intends to negotiate on a sole source basis with Scientific Consulting Services, Inc., (SCSI) Kirkland, WA for the continuation of research services on the Service Life Prediction of Coatings for NIST's Building Materials Division. This research is to investigate the quantitative behavior of the uv-photolytic degradation mechanisms under the fundamental assumption that radiant flux is a stochastic process and that the photo-initiated chemical reactions of first order Photoxidation process with unknown reaction rates, are all recursive within what is called the photo-oxidation wheel. This wheel was previously identified by Mielewski, Bauer and Gerlock and known as the MBG-wheel. This requirement is in part, an extension of efforts performed under previous Contract No. 50SBNB6C9179 to model multiple pathways within a photo-oxidation wheel and, in part, the initiation of a new line of research in statistical fitting of classes of functions to Fourier Transmission Infrared Spectroscopy (FTIR) data on changes in chemical concentrations within material undergoing degradation. The period of performance is for six months. FOB Destination Gaithersburg, MD. No solicitation package will be issued. A Request for Quotation (RFQ) will be issued to SCSI. SCSI is the only vendor capable of performing this service because Dr. Saunders' involvement in the effort. Dr. Saunders derived the original hydrolysis and photo-oxidation model. Experimental data revealed that the model could be generalized through the relaxation of some of the original assumptions. The proposed contract is to make this extension. Scientific Consulting Services is best equipped to make these extensions since Dr. Saunders derived the original model and is aware of the literature and experimental studies leading up to its derivation. The anticipated award date of the contract is on or around fifteen days from the date of this notice. See Note 26. If you have any questions regarding this announcement, please contact Diane Loeb on 301 975-6399 or via email dloeb@nist.gov. Posted 05/28/99 (W-SN337262). (0148)

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