Show simple item record

dc.contributor.authorLin, Tingdongen_US
dc.date.accessioned2014-03-14T21:14:03Z
dc.date.available2014-03-14T21:14:03Z
dc.date.issued1993-02-05en_US
dc.identifier.otheretd-06062008-165916en_US
dc.identifier.urihttp://hdl.handle.net/10919/38364
dc.description.abstract

The thermodynamic and kinetic phenomena involved in the formation of sub-micron polyimide particles from polyimide/solvent/nonsolvent ternary systems were studied. A quantitative equilibrium approach was considered in the B-bonding studies of these ternary systems. The effect of H-bonding on the physical properties and phase behavior of the ternary systems was investigated. The critical requirements for the control of polymer particle size and size distribution during particle formation by precipitation from solution are discussed.

It was found that the equilibrium constants, enthalpies and entropies of H-bonding in the ternary systems containing water can be obtained by analysis of the lH_NMR data. Using the calculated equilibrium constants, the determination of the concentration of H-bonds between N-methylpyrrolidinone (NHP) and water is possible. We found a very good correlation between the B-bond concentrations and the deviations of the specific volume and viscosity from ideal mixing in the NHP/water mixtures.

en_US
dc.format.mediumBTDen_US
dc.publisherVirginia Techen_US
dc.relation.haspartLD5655.V856_1993.L56.pdfen_US
dc.subjectPolyimidesen_US
dc.subject.lccLD5655.V856 1993.L56en_US
dc.titleOn the phase behavior and particle formation in polyimide/solvent/nonsolvent ternary systemsen_US
dc.typeDissertationen_US
dc.contributor.departmentChemistryen_US
thesis.degree.namePhDen_US
thesis.degree.leveldoctoralen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06062008-165916/en_US
dc.date.sdate2008-06-06en_US
dc.date.rdate2008-06-06
dc.date.adate2008-06-06en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record