While forming polymer gels using PHPA and PEI at 80oC or higher temperatures, the gel turns yellow in some days and eventually breaks. Why?

14 June 2023 0 1K Report

While forming polymer gels by crosslinking PHPA and PEI at 80oC or higher temperatures, the gel surface starts turning yellow in some days, and eventually the entire gel turns yellow and gets weakened. Why is this happening?

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