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Passionetta said:
Thanks for your replies. I knew I could count on KP followers for help. It's good to know that Polyamide is the same as nylon. And I didn't know that acrylic stretched. This is useful information. Thanks again.
Polyamide is NOT the same as nylon! They have different names because they're different fibers. They have different chemical make-ups and are different structurally and functionally. Every one of the fibers mentioned so far is different from all the others. That's why they have different names.

What they have in common is that they're all fibers.
 
Conchalea said:
I found this from polyamidefabric.com:
"Naturally occurring polyamide are wool & silk which are nothing but proteins while artificiallly manufactured polyamide are nylon, sodium poly(asparate) & aramids. As far as polyamide fabric is concerned, it is generally sold as nylon in all parts of the world." Another article said polyamide yarn is fire resistant. Very interesting to find that wool & silk are both natural polyamides!
That would explain why wool, silk and nylon can all be dyed with acid dyes, but you need special dyes for all other synthetics.
 
Not all of us had a course in chemistry.

I didn't.

I've tried to learn it from books, but most of what is available is textbooks, and they do what I call "talking to themselves."

"Talking to yourself" is when you know the subject well, but leave out important basic parts because they're SO basic that on a subconscious level, you expect everyone to already know them. Like leaving out a discussion of the effects of gravity on an instruction to pour something into a container.

Whatever they left out of those books, it turned the rest of it into gobbledygook. I suppose it's OK for textbooks to do that because they assume they'll be used in a classroom and you can ask the teacher.

I did love the discussion on how amino acids polymerize into long chains that sometimes cross-link in ways that form tiny machines that do things. It sounds like nature has already made it's own nanobots.
 
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