Thermally reversible cross-linked polyamides and thermo-responsive gels by means of Diels–Alder reaction
2006; Elsevier BV; Volume: 47; Issue: 8 Linguagem: Inglês
10.1016/j.polymer.2006.02.057
ISSN1873-2291
AutoresYing‐Ling Liu, Chia‐Yun Hsieh, Yiwen Chen,
Tópico(s)Polymer Nanocomposites and Properties
ResumoCross-linked polyamides and polyamide gels were prepared from maleimide-containing polyamides and a tri-functional furan compound and showed thermal reversibility in cross-linking behavior and in gel formation through Diels–Alder (DA) and retro-DA reactions. The rate constant k of the DA cross-linking reaction were 1.25–4.83×10−5 dm3 mol−1 s−1 in the temperature range of 20–60 °C with an activation energy of 32.1 kJ mol−1. The cross-linking densities, thermal properties, and thermal reversibility of the polyamides/furan polymers were adjustable with the contents of maleimide groups in polyamides.
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