Event Title

Polycarbodiimides and Polyguanidines : Their reactivity and applications in covalent adaptable networks

Research Mentor(s)

Larsen, Michael B.

Description

We have recently discovered a new chemical transformation in which N,N’,N’’ tri-substituted guanidines undergo a thermal exchange reaction. Kinetic investigations indicate that the transformation is first order with respect to the guanidine, indicating a dissociative mechanism in which a carbodiimide and amine are formed as intermediates. This new reaction has been applied to polymer systems. Polycarbodiimides were shown to undergo postpolymerization modification with amines to form polyguanidines at room temperature under an hour. Polyguanidines undergo the newly found chemical transformation to form different substituted polyguanidines. This exchange reaction will be applied to the preparation of a covalent adaptable network by using multi functional amines with the polycarbodiimides. We hypothesize that the dynamic properties of these polymers will make them able to be re-used, recycled, or reprocessed.

Document Type

Event

Start Date

15-5-2019 9:00 AM

End Date

15-5-2019 5:00 PM

Location

Carver Gym (Bellingham, Wash.)

Department

Chemistry

Genre/Form

student projects, posters

Subjects – Topical (LCSH)

Polymers; Carbodiimides--Synthesis; Polyamines--Synthesis

Type

Image

Rights

Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this document for commercial purposes, or for financial gain, shall not be allowed without the author’s written permission.

Language

English

Format

application/pdf

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May 15th, 9:00 AM May 15th, 5:00 PM

Polycarbodiimides and Polyguanidines : Their reactivity and applications in covalent adaptable networks

Carver Gym (Bellingham, Wash.)

We have recently discovered a new chemical transformation in which N,N’,N’’ tri-substituted guanidines undergo a thermal exchange reaction. Kinetic investigations indicate that the transformation is first order with respect to the guanidine, indicating a dissociative mechanism in which a carbodiimide and amine are formed as intermediates. This new reaction has been applied to polymer systems. Polycarbodiimides were shown to undergo postpolymerization modification with amines to form polyguanidines at room temperature under an hour. Polyguanidines undergo the newly found chemical transformation to form different substituted polyguanidines. This exchange reaction will be applied to the preparation of a covalent adaptable network by using multi functional amines with the polycarbodiimides. We hypothesize that the dynamic properties of these polymers will make them able to be re-used, recycled, or reprocessed.