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<p>and can be broken or exchanged with other pending <a href="page.php?w=functional_group">functional group</a>s, allowing the polymer network to change its topology. This introduces reshaping, (re)processing and <a href="page.php?w=recycling">recycling</a> into thermoset-like materials.</p>

<p><big> Background </big></p>
<p>Historically, polymer materials have always been subdivided in two categories based on their thermomechanical behaviour. <a href="page.php?w=Thermoplastic">Thermoplastic</a> polymer materials melt upon heating and become <a href="page.php?w=viscous_liquid">viscous liquid</a>s,</p><p>
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