Production of <a href="https://en.wikipedia.org/wiki/Aramid" class="extiw" title="w:Aramid">w:Aramid</a> from <a href="https://en.wikipedia.org/wiki/P-Phenylenediamine" class="extiw" title="w:P-Phenylenediamine">p-phenylenediamine</a> and terephthaloyl chloride.
<a href="//commons.wikimedia.org/wiki/User:Hbf878" title="User:Hbf878">Hbf878</a>
2017-11-15
<span class="int-own-work" lang="en">Own work</span>