Accession Number:

AD1045180

Title:

Metastable Polymers for On Demand Transient Electronic Packaging

Descriptive Note:

Technical Report,23 Mar 2015,27 Aug 2017

Corporate Author:

University of Illinois Champaign Urbana United States

Personal Author(s):

• Moore,Jeffrey
• Rogers,John
• Sottos,Nancy
• White,Scott

Report Date:

2018-01-17

Pagination or Media Count:

32.0

Abstract:

The thermally-triggered depolymerization of cyclic polyphthalaldehyde cPPA was investigated and tailored to enable thermal processing and molding in bulk quantities. Stabilization of cPPA at elevated temperature was accomplished by removal of the latent Lewis acid catalyst BF3 and by addition of radical inhibitors and a Lewis base. Addition of a plasticizer to the stabilized cPPA enabled the fabrication of a monolithic solid polymer via hot press molding. The bulk material retains the transient properties of cPPA when triggered by sufficient heat or acid.

Descriptors:

• depolymerization
• POLYMERS
• chemical stability
• polymer engineering

Subject Categories:

• Polymer Chemistry
• Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE