Mechanism of the Initiation of the Cationic Polymerization of Styrenes by Silanes and Activated Covalent Esters

Abstract

Mechanism of the initiation of the cationic polymerization of styrenes by silanes and activated covalent species has been studied by NMR and SEC. Trimethylsilyl trifluoromethanesulfonate has been used as initiator for the cationic polymerization of styrene. It has been found that silyl triflate does not react directly with styrene but polymerization is initiated by the trace amount of the triflic acid formed by the hydrolysis of trimethylsilyl triflate. Polymer end groups do not contain silyl groups, polymerization is strongly inhibited by hindered pyridine and starts only after pyridine is completely consumed. Hexamethyldisiloxane has found in the reaction products. Trimethylsilyl triflate, Polysilanes, Modifications, Cationic polymerization, Styrene.

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Document Details

Document Type
Technical Report
Publication Date
Mar 23, 1989
Accession Number
ADA206502

Entities

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  • K. Matyjaszewski

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  • Carnegie Mellon University

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  • Counter IED
  • Materials and Manufacturing Processes
  • Weapons Technologies

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  • Abstracts
  • Alkenes
  • Chemical Synthesis
  • Chemistry
  • Civil Engineering
  • Dielectric Polymers
  • Dissociation
  • Ethers
  • Lewis Acids
  • Macromolecules
  • Military Research
  • Molecular Weight
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  • Chemistry

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  • Polymer Science and Technology