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Syntheses of polymers with diverse architectures via metathesis polymerization and investigation of their structure-property relationships

Citation

Xia, Yan (2010) Syntheses of polymers with diverse architectures via metathesis polymerization and investigation of their structure-property relationships. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechTHESIS:05192010-182707354

Abstract

Metathesis polymerization using highly active, functional-group-tolerant catalysts is a powerful and versatile method for polymer synthesis. This thesis focuses on the preparation of a variety of advanced polymer architectures using well-defined ruthenium-based metathesis catalysts and the study of materials properties dictated by those unique macromolecular structures. Chapter 1 introduces olefin metathesis, metathesis polymerization, and recent developments in living/controlled polymerization and polymer functionalization. The goal is to provide a summary of the current toolbox of polymer chemists. The second part of Chapter 1 describes using these tools to synthesize different macromolecular architectures. Chapters 2 and 3 describe ring-expansion metathesis polymerization (REMP) using cyclic catalysts. Chapter 2 focuses on catalyst development, while Chapter 3 focuses on the REMP mechanism and cyclic polymer characterization. Chapters 4 and 5 focus on brush polymers. Chapter 4 describes the syntheses of linear and cyclic brush polymers using ring-opening metathesis polymerization (ROMP) and REMP of macromonomers (MMs), respectively. Chapter 5 describes the efficient synthesis of brush copolymers and the study of their melt state self-assembly into highly ordered nanostructures. Chapter 6 describes the synthesis and electro-optic response of well-defined liquid crystalline (LC) gels that were made from controlled end-linking of telechelic LC polymers. These gels possessed very fast, reversible electro-optic switching; the degree of response was closely related to network structure.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:metathesis polymerization, cyclic polymer, brush polymer, liquid crystalline network
Degree Grantor:California Institute of Technology
Division:Chemistry and Chemical Engineering
Major Option:Chemistry
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Grubbs, Robert H. (advisor)
  • Kornfield, Julia A. (co-advisor)
Thesis Committee:
  • Tirrell, David A. (chair)
  • Heath, James R.
  • Davis, Mark E.
Defense Date:19 April 2010
Record Number:CaltechTHESIS:05192010-182707354
Persistent URL:http://resolver.caltech.edu/CaltechTHESIS:05192010-182707354
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5818
Collection:CaltechTHESIS
Deposited By: Yan Xia
Deposited On:04 Jun 2010 17:27
Last Modified:26 Dec 2012 03:25

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