Poly(exo-5-hydroxynorbornene)

Structural Characterization and Property Evaluation of Various Cis-Trans Isomer Compositions

Tze-chiang Chung, S. Ramakrishnan, M. W. Kim

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Poly(exo-5-hydroxynorbornene) was synthesized via ring-opening metathesis polymerization of an organoborane derivative of norbornene. The polyborane was oxidized by using alkaline H2O2 to give the hydroxy polymer. With the objective of controlling the spatial orientation of the hydroxyl groups on the polymer backbone, polymers with different cis-trans contents were synthesized by different polymerization catalysts. The structural characterization of these polymers was done by using IR, 1H NMR, and 18C NMR spectroscopy. The molecular structure details will be discussed in terms of sequence distribution of cis-trans and head-tail diads. The thermal properties and molecular orientation of various isomeric structures were evaluated by DSC and two-dimensional surface studies at the air-water interface separately. Surface area measurements show that the polymer backbone with cis structure has significantly higher rigidity than that of the corresponding trans form.

Original languageEnglish (US)
Pages (from-to)2675-2681
Number of pages7
JournalMacromolecules
Volume24
Issue number10
DOIs
StatePublished - May 1 1991

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Isomers
Polymers
Chemical analysis
Molecular orientation
Ring opening polymerization
Rigidity
Hydroxyl Radical
Molecular structure
Nuclear magnetic resonance spectroscopy
Thermodynamic properties
Polymerization
Nuclear magnetic resonance
Derivatives
Catalysts
Water
Air

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

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Poly(exo-5-hydroxynorbornene) : Structural Characterization and Property Evaluation of Various Cis-Trans Isomer Compositions. / Chung, Tze-chiang; Ramakrishnan, S.; Kim, M. W.

In: Macromolecules, Vol. 24, No. 10, 01.05.1991, p. 2675-2681.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Poly(exo-5-hydroxynorbornene)

T2 - Structural Characterization and Property Evaluation of Various Cis-Trans Isomer Compositions

AU - Chung, Tze-chiang

AU - Ramakrishnan, S.

AU - Kim, M. W.

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AB - Poly(exo-5-hydroxynorbornene) was synthesized via ring-opening metathesis polymerization of an organoborane derivative of norbornene. The polyborane was oxidized by using alkaline H2O2 to give the hydroxy polymer. With the objective of controlling the spatial orientation of the hydroxyl groups on the polymer backbone, polymers with different cis-trans contents were synthesized by different polymerization catalysts. The structural characterization of these polymers was done by using IR, 1H NMR, and 18C NMR spectroscopy. The molecular structure details will be discussed in terms of sequence distribution of cis-trans and head-tail diads. The thermal properties and molecular orientation of various isomeric structures were evaluated by DSC and two-dimensional surface studies at the air-water interface separately. Surface area measurements show that the polymer backbone with cis structure has significantly higher rigidity than that of the corresponding trans form.

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