3D Printing Amorphous Polysiloxane Terpolymers via Vat Photopolymerization

Justin M. Sirrine, Alisa Zlatanic, Viswanath Meenakshisundaram, Jamie M. Messman, Christopher B. Williams, Petar R. Dvornic, Timothy E. Long

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Photocuring and vat photopolymerization (VP) additive manufacturing (AM) is reported for two families of fully amorphous poly(dimethyl siloxane) (PDMS) terpolymers containing either diphenylsiloxy (DiPhS) or diethylsiloxy (DiEtS) repeating units. A thiol-functionalized PDMS crosslinker enables rapid crosslinking in air using efficient thiol–ene addition. Differential scanning calorimetry and dynamic mechanical analysis (DMA) confirm the absence of crystallinity for the DiPhS-containing systems, while DMA shows a rubbery plateau extending to greater than 200 °C for the DiEtS-containing system. VP-AM of both photopolymer systems afford well-defined 3D geometries, including high aspect ratio structures, which demonstrate feasibility of these photopolymers for the 3D printing of unique geometric objects that require elastomeric performance to temperatures as low as −120 °C.

Original languageEnglish (US)
Article number1800425
JournalMacromolecular Chemistry and Physics
Volume220
Issue number4
DOIs
StatePublished - Feb 1 2019

Keywords

  • 3D printing
  • elastomers
  • poly(dimethyl siloxane)
  • siloxane terpolymers
  • thiol–ene reaction
  • vat photopolymerization

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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