Soluble, high molecular weight polysilsesquioxanes with carboxylate functionalities

Kamyar Rahimian, Douglas A. Loy, David R. Wheeler

Research output: Contribution to journalConference articlepeer-review


High molecular weight polysilsesquioxanes with carboxylate functionalities were prepared by sol-gel polymerization of organotrialkoxysilanes beating tert-butyl ester groups. Trialkoxysilyl-containing monomers of the type (RO)3Si(CH2)3C(O)OtBu (R = Me, Et) were prepared by hydrosilation of the corresponding vinylic tert-butyt esters CH3CHCH2 C(O)OtBu. Acid- or base-catalyzed polymerization of the monomers leads to very high molecular weight polymers with relatively narrow polydispersities. The polymerization results in complete condensation of the alkoxy groups while the tert-butyl ester functionality remains fully intact. Partial or full deprotection of the tert-butyl group can easily be achieved to yield the corresponding carboxylic acid polymers. The ester and carboxylic acid functionalities of these new materials allow for their potential use in a variety of applications such as scavenging of heavy metals.

Original languageEnglish (US)
Pages (from-to)205-210
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
StatePublished - 2002
EventOrganic/Inorganic Hybrid Materials 2002 - San Francisco, CA, United States
Duration: Apr 1 2002Apr 5 2002

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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