Talk:Twaron

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Untitled 1[edit]

This re-direct isn't strictly speaking correct. Although Kevlar and Twaron are both aramid fibres they are the trade names used by two different companies. Kevlar is the trade name of DuPont and Twaron belongs to Teijin Twaron— Preceding unsigned comment added by Quarkstorm (talkcontribs) 14:47, 6 November 2006‎

Totally right, redirect changed to Aramid. Better would be writing an article on Twaron.--MBLe 17:22, 17 January 2007 (UTC)
True, however, it still should be noted that they are chemically virtually identical. Although I believe that Kevlar is a little bit more sulfonated than twaron. Was Dupont actually first in the manufacture? And what about the patent war between (then) Enka and Dupont about the use of CaCl22 and [NMP]? Sikkema 10:12, 13 June 2007 (UTC)

Untitled 2[edit]

Why is it an AABB polymer? Shouldn't it be an AB polymer? I'm with gerrit (talk) 11:49, 21 November 2007 (UTC)

An AB polymer would be -CO-NH-Ar-CO-NH-Ar-CO-NH-Ar- as the A or B refer to the NH or CO groups. AABB is therefore -NH-CO-Ar-CO-NH-Ar-NH-CO- which is the sequence used for industrial aramids. (Ar stands for aromatic ring) --MBLe 14:57, 23 November 2007 (UTC) —Preceding unsigned comment added by Mbvanleeuwen (talkcontribs)
Wouldn't it make more sense to have A and B refer to the monomers used (see the page on copolymers), which would make this an AB copolymer? I'm with gerrit (talk) 13:18, 24 November 2007 (UTC)
Actually I didn't make this up, it is the way JWS Hearle describes aramids in his book "High performance fibres". And with reason, because when using the sequence code for the monomers (specifically used for para-aramid), you would strongly restrict yourself in describing other variants of aramids. Mbvanleeuwen (talkcontribs) --MBLe 14:44, 5 December 2007 (UTC)