Type of Document Dissertation Author Kim, Young Jun URN etd-02262007-095955 Title Kinetic and mechanistic investigations of polyimide formation and characterization of their blends with polybenzimidazoles Degree PhD Department Chemistry Advisory Committee
Advisor Name Title McGrath, James E. Committee Chair Dillard, John G. Committee Member Gibson, Harry W. Committee Member Riffle, Judy S. Committee Member Tanko, James M. Committee Member Keywords
- Polyimides Synthesis
Date of Defense 1992-03-05 Availability restricted Abstract
This dissertation describes kinetic and mechanistic studies of high performance polyimide formation, synthesis and characterization of fully cyclized, molecular weight and end group controlled polyimides, and investigations of high performance polymer blends based upon polyimides and polybenzimidazole.
Imidization kinetics were successfully followed by the quantitative non-aqueous titration of the amic acid functional groups as a function of reaction conditions. The homogeneous solution imidization processes were described by auto-acid catalyzed second order kinetics. The effects of heteroatom bridging groups in the diamines and dianhydrides on reaction rates have been investigated and a possible reaction mechanism for the solution imidization processes has been proposed.
Filename Size Approximate Download Time (Hours:Minutes:Seconds)
28.8 Modem 56K Modem ISDN (64 Kb) ISDN (128 Kb) Higher-speed Access LD5655.V856_1992.K56.pdf 7.53 Mb 00:34:50 00:17:55 00:15:40 00:07:50 00:00:40next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.
If you have questions or technical problems, please Contact DLA.