Industry/University Cooperative Research:  A Study of Small Molecule Transport in Polymers by Oscillatory Sorption      (Supplement)
{'Code': '07020000', 'Directorate': {'Abbreviation': 'ENG', 'LongName': 'Directorate For Engineering'}, 'Division': {'Abbreviation': 'CBET', 'LongName': 'Div Of Chem, Bioeng, Env, & Transp Sys'}}
{'SignBlockName': 'Robert M. Wellek', 'PO_EMAI': None, 'PO_PHON': None}
Research Summary:  Non-classical mutual diffusion in                            polymer/penetrant systems is studied by an oscillatory sorption                 technique.  The physical systems used in the study are                          polystyrene (PS)/ethylbenzene (EB) and polyimide (PI)/n-methyl                  pyrrolidone (NMP), and they are chosen because they are typical                 of 2 broad classes of behavior.  A series of experiments will be                performed varying the important dimensionless parameter governing               the polymer diffusion behavior:  the diffusion Deborah number                   (DEB).  The researchers aim to observe the transition from non-                 classical to classical behavior as DEB is decreased. Quantitative               comparisons with a new, thermo-rheological theory will be made.                                                                                                 Uniqueness/Innovation:  The researchers propose to use the                      oscillatory sorption technique for macromolecular systems                       advocated by Vrentas and Duda (J&gt; Memb. Sci. 18, 161 (1984)).                   The method is potentially powerful:  its characterization of                    mutual diffusion resembles that of momentum transport by dynamic                mechanical testing.  It eliminates uncertainties connected with                 imprecise initial conditions and allows precise manipulation of                 the time scale for observation.  The proposed design employs a                  piezoelectric quartz crystal transducer.  The theoretical                       approach combines modern, non-equilibrium thermodynamics and                    kinetic theory of concentrated polymer solutions; it formalizes                 the intuitive developmentof Brochard and DeGennes (Phys. Chem.                  Hyd. 4, 313 (1982)).  There are no adjustable constants in this                 new approach so that a priori, quantitative predictions of the                  data can be obtained and tested.                                                                                                                                Technical Impact/Significance:  The proposed experiments will                   clarify the molecular origins of non-classical effects at small                 driving forces.  Successful application of theory will represent                the first, rigorous predictions of non-classical transport.  The                work can then be extended to expose more general laws governing                 nonlinear transport.  The research has also several practical                   benefits:  (a) ultimately the theory will allow engineering                     predictions of non-classical diffusion rates from standard                      rheological data and classical diffusion data; (b) the quartz                   crystal microbalance enables the study of micromolecule transport               in polymer thin film and coatings development, (c) careful                      research of transport in the PI/NMP system is of generic                        importance to the electronics industry.
{'FirstName': 'Christopher', 'LastName': 'Durning', 'PI_MID_INIT': 'J', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Christopher J Durning', 'EmailAddress': 'cjd2@columbia.edu', 'NSF_ID': '000173863', 'StartDate': '02/15/1987', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Columbia University', 'CityName': 'NEW YORK', 'ZipCode': '100277922', 'PhoneNumber': '2128546851', 'StreetAddress': '615 W 131ST ST', 'StreetAddress2': 'MC 8741', 'CountryName': 'United States', 'StateName': 'New York', 'StateCode': 'NY', 'CONGRESSDISTRICT': '13', 'CONGRESS_DISTRICT_ORG': 'NY13', 'ORG_UEI_NUM': 'F4N1QNPB95M4', 'ORG_LGL_BUS_NAME': 'THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK', 'ORG_PRNT_UEI_NUM': None}
{'Name': None, 'CityName': None, 'StateCode': None, 'ZipCode': None, 'StreetAddress': None, 'CountryCode': None, 'CountryName': None, 'StateName': None, 'CountryFlag': None, 'CONGRESSDISTRICT': None, 'CONGRESS_DISTRICT_PERF': '""'}
{'Code': '1414', 'Text': 'INTERFAC PROCESSES & THERMODYN'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1986&All=true', 'xml': '8617369.xml'}