Chain Growth Cross Coupling Polymerizations Towards Chiral and Ladder Main Chain Polymers

Abstract

We developed a new method to synthesize rigid ladder polymers using efficient, clean palladium catalyzed annulation reactions with low catalyst loading (1 mol%). Rigid ladder polymers with benzocyclobutene backbone linkages can be synthesized from copolymerization of readily accessible aryl dibromides and norbornadiene or polymerization of AB type monomers bearing norbornene and aryl bromide or triflate moieties. High molecular weight (10-40 kDa) rigid ladder polymers can be obtained with complete monomer conversions. Diverse monomers also gave different, fixed ladder polymer conformations. The ladder polymers exhibited excellent thermal stability, high carbonization yield, and large intrinsic porosity.

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Document Details

Document Type
Technical Report
Publication Date
Nov 20, 2014
Accession Number
ADA622918

Entities

People

  • Yan Xia

Organizations

  • Stanford University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Catalysts
  • Chemistry
  • Density Functional Theory
  • Department Of Defense
  • Dielectrics
  • Engineering
  • Materials
  • Mathematics
  • Physical Properties
  • Polymer Chemistry
  • Polymerization
  • Polymers
  • Porosity
  • Students
  • Thermal Stability
  • Transition Metals

Fields of Study

  • Chemistry

Readers

  • Occupational Health and Safety.
  • Organic Chemistry
  • Polymer Science and Technology