Title page for ETD etd-05222007-091355


Type of Document Dissertation
Author Liu, Qin
URN etd-05222007-091355
Title Poly(2-alkyl-2-oxazoline) containing multiphase systems
Degree PhD
Department Materials Engineering Science
Advisory Committee
Advisor Name Title
Marand, Hervé L. Committee Chair
Riffle, Judy S. Committee Chair
McGrath, James E. Committee Member
Wightman, James P. Committee Member
Wilkes, Garth L. Committee Member
Keywords
  • Polymerization.
Date of Defense 1992-05-01
Availability restricted
Abstract

This research is focused on the polymerization of 2-alkyl-2-oxazoline homopolymers and 2-alkyl-2-oxazoline containing copolymers with well-defined structures. In addition, the potential of selected materials as polymer blend compatibilizers was briefly evaluated. The polymerization of 2-alkyl-2-oxazoline was investigated with regard to the effects of initiator structures on molecular weight control and molecular weight distribution, living characteristics, and mechanisms and kinetics. The structure of initiators was shown to greatly affect the molecular weight control and molecular weight distribution of poly (2-ethyl-2-oxazoline). The living nature of poly (2-ethyl-2-oxazoline) in chlorobenzene initiated by benzyl iodide, benzyl chloride/NaI, or chloroethyl ethyl ether/NaI has been established by Mn-conversion plots and sequential monomer addition experiments. However, the molecular weight distributions of these polymers were not as narrow as Poisson distributions, Mechanistic and kinetic studies of 2-ethyl-2-oxazoline polymerizations suggested that, at very early stages of polymerization, the active species is covalent.

Files
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
[VT] LD5655.V856_1992.L596.pdf 9.77 Mb 00:45:15 00:23:16 00:20:21 00:10:10 00:00:52
[BTD] next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.