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Old 04-02-2012, 11:33 PM
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Question I need a chemist or materials engineers help please.

I was thinking of making myself a few indicators using Macrame cord like I read in an article. Some macrame cord is mad out of polypropylene (I know this floats) and some out of polyolefin fiber. Does anyone know if they are close enough to be interchangeable?

thanks all!
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Old 04-03-2012, 03:48 AM
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Default Re: I need a chemist or materials engineers help please.

Polyolefins is a class of polymers (plastics) that includes Polypropylene (PP) & Polyethylene (PE). Both PP and PE has lower densities than water so either should float well.

I am a material scientist & do research on these types of materials for my day job
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Old 04-03-2012, 09:37 AM
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Default Re: I need a chemist or materials engineers help please.

Quote:
Originally Posted by mysticm View Post
Polyolefins is a class of polymers (plastics) that includes Polypropylene (PP) & Polyethylene (PE). Both PP and PE has lower densities than water so either should float well.

I am a material scientist & do research on these types of materials for my day job
Thanks mysticm!
I did a bit of reading and figured out they where 'related' but I was not sure how similar the properties are. My organic chem classes where too long ago to be helpful. I will give it a try and see what happens.
Thanks again
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Old 04-07-2012, 05:31 PM
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Default Re: I need a chemist or materials engineers help please.

The Polyethylene "Craft Cord" does float well, and should be even better bunched up like in the video and maybe with a bit of gink added.


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