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This is an old revision of this page, as edited by 71.31.153.56 (talk) at 18:01, 11 June 2011 (→Chemistry - concepts of nylon production). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

me and my dumb ideas

would it be possible to use chains containing a thiol group for the R and R' so that disulfide bridges similar to the ones in keratin would form? If so, would that significantly increase strength? Scythe33 03:12, 15 December 2006 (UTC)[reply]

trademark

I removed this paragraph:

The word nylon is no longer a trademark as it was deemed to have become a generic term. In a historic lawsuit competitors claimed that Nylon was such a household word that it could no longer be considered a Registered Trademark. As a result, Nylon is now a word in the English language.

Here are references stating that "nylon" was never trademarked, including Dupont itself:

See genericized trademark for a list of former trademarks. Samw 00:43, 5 Oct 2003 (UTC)

Correction? - about - ' inorganic ingredients: coal, water and air'

In the entry for nylon second paragraph, second sentence reads:

It was the first synthetic fibre to be made entirely from inorganic ingredients: coal, water and air.

My question is coal really an 'inorganic ingredient'? So should be be corrected if it isn't a true statement?

Also, it is very confusing to have Nylon in Category:Organic polymers when the entry states it is inorganic.

This could be meant as a distinction from polymers such as protein, starch, DNA etc which are made by living creatures.

The following comment on the second paragraph looks like a discussion statement, so I moved it here --BjKa 13:10, 18 May 2005 (UTC) :[reply]

The general information above is fairly close to what goes into PA/Nylon polymerization. However, "coal and steam" is a bit simplistic, and the combination of HMD and AA to make PA-66 leaves out quite a bit of details. In fact, you CAN get PA-66 from other starting monomers. And you CAN (and always do) get any polyamide from anything other than coal.

question

does anybody know much about the tensile strength of nylon?

as well as the tensile strength of cotton, polyester, spandex, and cotton/polyester blend, fabrics?

thanks and please let me know ASAP.

68.106.85.147 23:03, 10 October 2005 (UTC)alex[reply]

  • "Nylon" is a very general term. You might mean Nylon 6, 6, Nylon 6 (properties here), Nylon 6, 12, Nylon 11, or any of several other common types. Polyesters are another complicated family of molecules, but the word most commonly means polyethylene terephthalate, which has these properties. Spandex is actually polyurethane; this might be a rough guide, but the "strength" of elastomers is a tricky subject, very much dependent upon temperature and strain rate. As for natural fibers and blends, finished strength has quite a lot to do with how the fibers are spun, as well as their staple length (which is dependent on the heritage of whatever organism produced the fiber, and can also change somewhat during processing as fibers break). A fair comparison would use cellulose monofilament, but that's not really practical to make without chemical modification of the cotton (see rayon). Hope this helps, Joel 02:15, 11 October 2005 (UTC)[reply]

Nylon is Organic: Ref. Coal, Air and Water

The phrase "made from coal, air an water" was an old standby often used in the early days of synthetic polymers to establish the uniqueness of the new synthetic systems. From the very beginning nylon was never made from "coal" but from petroleum feedstocks. In fact the choice of nylon 6,6 as the preferred composition was based on the availability and low cost of benzene from such sources. So its presence here is technically incorrect but the meat of the meaning is correct that nylon was the first synthetic fiber, "made from scratch," so to speak. I have made a couple of changes to the wording regarding monomer length vs nylon suffix number and taken Carothers out of the picture as far as naming the material. I am Carothers' biographer and he was dead when the subject of naming nylon came up.

Clothing

Changed uses to clothing from the collection of individual items, which could never be complete and just invited edit wars. Please comment here instead of revert wars if we need to come to consensus. Wikibofh(talk) 18:40, 15 December 2005 (UTC)[reply]

Nylon

Another possible origin for the word "Nylon" is that during WW2, the american soldiers, using it for their parachutes, used to say "Now [that we have these brand new parachutes] You've Lost Old Nippon", which, if you take the first letter of each word, makes the word "NYLON"...

This play of words was most likely to be plyed after Nylon was already the name and some people tried to figure out where it came from. 217.185.50.221 09:46, 29 January 2006 (UTC)[reply]


according to [1]http://www.chemheritage.org/pubs/ch-v26n3-articles/feature_nylon_p1.html

Before DuPont could take its new miracle fiber to the public, however, its leaders had to decide what to call it. In-house researchers had alternately been referring to what would become nylon as Rayon 66, Fiber 66, or “Duparon,” a creative acronym for “DuPont pulls a rabbit out [of] nitrogen/nature/nozzle/naphtha.” In 1938, through a decision-making process that remains somewhat obscure, the company settled on the word nylon. According to Ernest Gladding, manager of the Nylon Division in 1941, the name had originally been “Nuron,” which not only implied novelty but cleverly spelled “no run” backwards. Unfortunately, Nuron and other closely related words posed trademark conflicts, so the division proposed “Nilon.” Changing the i to a y removed any ambiguity surrounding pronunciation, and “nylon” was born. The company then decided not to trademark the name, hoping instead to encourage consumers to think of nylon as a generic preexisting material, like wood or glass. —Preceding unsigned comment added by 71.111.148.9 (talk) 20:37, 21 December 2009 (UTC)[reply]

Nylon 6 vs Nylon 6,6

The two companies agreed to a full patent exchange and a seperation of the sales areas in 1939 because DuPont and IG Farben saw that the difference of the two products was marginal and the competition would only lower the income from the product. This should also be in the text somewhere. Also that both polymeres where sold as Nylon. In 1952 the name Perlon was created to make a difference. Stone 09:54, 29 January 2006 (UTC)[reply]

Melting points

I have added the melting point range for the family as found at http://www.machinedesign.com/BDE/materials/bdemat2/bdemat2_29.html to the page. I realise that this is a family of compounds, but people generally think of a single substance called 'Nylon' and as such I would consider it to be useful to have a rough indication of the melting temperatures on this page.

Request for content addition: physical/chemical properties

I don't know how complicated a response to this could become, given that a family of substances is addressed by the term "Nylon", but I think a block of content describing physical properties would be a good addition to the article. A few things that come to mind might be mechanical strength ("tensile strength" was requested above already) and chemical properties such as resistance to solvents, etc. -thanks, Onceler 22:59, 22 July 2006 (UTC)[reply]

fiber percentage

the article about WWII historical fiber percentage says cotton was 80%, wool plus manufactured fibers 20% at the outset of the war. That can't be correct because it doesn't mention hemp. Hemp was in significant use during the war; the US govt made a film called "Hemp For Victory" to help encourage farmers to grow it. -- Akb4 07:36, 31 August 2006 (UTC)[reply]

Agree, it must be off. Can somebody look at this. Not only hemp but rayon, linen, silk, etc. must be more than 0% each. Erikdhanson (talk) 02:41, 14 June 2008 (UTC)[reply]

PA 6 and 66 draw

About PA 6.6:

"Since each monomer in this copolymer has the same reactive group on both ends, the direction of the amide bond reverses between each monomer..."


And about PA 6:

"The peptide bond within the caprolactam is broken with the exposed active groups on each side being incorporated into two new bonds as the monomer becomes part of the polymer backbone. In this case, all amide bonds lie in the same direction..."

So, were the chains PA 6 / 66 drawn (http://en.wikipedia.org/wiki/Image:Nylon6_and_Nylon_66.png) correctly? In there, both amide group are in the same direction. I would like to know...

Thanks!

news article for consideration

http://www.delawareonline.com/apps/pbcs.dll/article?AID=/20070319/LIFE/703190303/-1/NLETTER01 --151.197.17.248 10:54, 20 March 2007 (UTC)[reply]

Etymology

I saw a documentary on nylon on German television and they stated that th name came from New York and London, but the claim was that the date of the patent was the same in both cities. That would be February 16, 1937. I can't find any information for a patent in London. Anyone else hear this story ??? TinyMark 13:47, 2 September 2007 (UTC)[reply]

I've heard of it, but it is an urban legend: http://www.snopes.com/business/names/nylon.asp Rmg12 20:38, 12 November 2007 (UTC)[reply]

The etymology section looks like it needs rephrasing: the sentence structure is rubbish. Anyone agree? 139.133.7.37 (talk) 19:29, 26 February 2008 (UTC)[reply]

Metalized Nylon?

The Mylar article states "Metallized nylon (or "foil") balloons used for floral arrangements and parties are often called 'Mylar'," implying that the material to make these balloons is not the same as Mylar. However, the balloon article links to the Mylar article in describing that type of balloon, implying that it is Mylar. Nowhere that I can see is there any description of what 'metalized nylon' is and how it differs from Mylar. Is it just a form of thin-film deposition applied to nylon? Somewhere there needs to be that description, probably on the nylon page, and the Mylar and balloon pages need to be clarified (are they made of Mylar or metalized nylon?).

Erp Erpington (talk) 22:00, 14 December 2007 (UTC)[reply]

Biodegradable?

Is nylon biodegradable? I don't think so, but it would be nice to know for sure. —Preceding unsigned comment added by 75.61.103.247 (talk) 22:39, 21 April 2008 (UTC)[reply]

Patent Cites

The citation to the patents could link directly to the patents. See: http://en.wikipedia.org/wiki/Template:Cite_patent —Preceding unsigned comment added by 206.207.111.69 (talk) 15:44, 25 April 2008 (UTC)[reply]

Electrical conductivity

Why was sigma chosen for this and not rho? --kevinthenerd 65.161.183.226 (talk) 16:36, 4 June 2008 (UTC)[reply]

For consistency with the electrical conductivity article. --Wizard191 (talk) 18:23, 4 June 2008 (UTC)[reply]

Welding Nylon

-Aqueous Phenol
-Calcium Chloride in ethanol mixture.
-heat welding.
Souce. http://books.google.com/books?id=CF_-xp9iKHcC&pg=PT269&lpg=PT269&dq=what+solvent+welds+glues++nylon&source=bl&ots=R-b63yJeP9&sig=IUe6TVtjztIyUfAXzpBoIlurrc8&hl=en&ei=-gkFStTHJJSuMtj-pKMD&sa=X&oi=book_result&ct=result&resnum=7#PPT269,M1 —Preceding unsigned comment added by 69.154.213.220 (talk) 05:11, 9 May 2009 (UTC)[reply]

...committed suicide during the last year of his life...

hmmm. I wonder if anyone ever succeeded in commiting suicide before that? —Preceding unsigned comment added by Pashute (talk • contribs) 10:29, 9 June 2009 (UTC)[reply]

polymerisation equation

I think there is a n missing from the H2O on the right hand side of the equation at the end of the section "Chemistry". 82.43.163.218 (talk) 09:49, 10 April 2010 (UTC)[reply]

Chemistry - concepts of nylon production

This whole article needs work. The referenced section is particularily egregious. Being "better" (etc.) is not a concept. Using the word "concept" is simply WRONG and ill describes what it is the authors are attempting (and failing IMHO) to say. This section is a COMPARISON of the polymers resulting from two different SYNTHETIC REACTIONS (with different but similar reagents and products and only distantly related to manufacture) of N-6 to N-6,6. Being better, higher, lower, more or less are not concepts - nor are they characteristics!! THey are comparative properties. Not properties, COMPARATIVE PROPERTIES. This is obvious. It is also not in evidence here. Ida changed it myself if I coulda...71.31.153.56 (talk) 18:00, 11 June 2011 (UTC)[reply]

  1. ^ http://www.chemheritage.org/pubs/ch-v26n3-articles/feature_nylon_p1.html
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