Ledger · 2026-09-01 · Polymer Chemistry

Terephthalaldehyde-Crosslinked Polyimine Vitrimers via Catalyst-Free Solution Casting

Rejected

This concept did not clear the framework. The reasoning is published in full below.

Assessment

While the vitrimer achieves excellent unit economics and rapid speed to market, its tensile strength gain over BPA epoxy is only 1.2x (97 MPa vs 70-80 MPa), falling short of the required 2x step-change bar. The reprocessability advantage represents a circularity/sustainability preference attribute rather than a performance dimension the target buyer currently pays for. Consequently, the concept fails the strict superiority gate.

Claimed advantage

Tensile strength of 97.0 MPa vs 70-80 MPa for BPA Epoxy (1.2x improvement); 5 reprocessability cycles vs 0 for BPA Epoxy

Named comparator: Bisphenol A (BPA) Epoxy Resin

Also flagged

A rejection is not a claim that the science is wrong. It means the venture case did not survive: the comparator was not what the buyer actually buys, the comparison was not like-for-like, the advantage fell short of a step change, or the capital and time to first revenue were prohibitive.

Assessed 2026-09-01 against seven gates plus the voiding sub-tests. How the method works · Browse all concepts