Amorphous plastics do not have a sharp melting point; rather, regions of the polymer soften as the temperature increases. Crystalline thermoplastic polymers have a sharp melting point and change to a liquid once that point is met fairly quickly. Thermoset polymers do not melt.Tesel wrote:Yep, my bad.IcsTam wrote:I'm just going to post a question, if that's alright.
1. What is a copolymer?
2. Describe and differentiate between a random, alternating, block, and graft copolymer.
Assuming I'm right, I'll just post the next question, to make sure I don't forget.1. A copolymer contains multiple different monomer units. 2A. A random copolymer has monomers randomly ordered, e.g. ABAAABBAABABBBAAB. 2B. An alternating copolymer has regularly alternating monomer units, e.g. ABABABAB. 2C. A block copolymer consists of multiple "blocks" which each contain only one type of monomer, e.g. AAAABBBBAAAAABBB. 2D. A graft copolymer has one type of monomer on the main chain and a different type of monomer on the side chains. In other words, one chain is "grafted" onto the other.
Describe the "melting process" for:
1. Amorphous thermoplastic polymers.
2. Crystalline thermoplastic polymers.
3. Thermoset polymers.
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Re: Materials Science C
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Re: Materials Science C
Yep, well done. I'd reference the glass transition point for amorphous materials on a test.
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Re: Materials Science C
Describe the function of each of the following: Plasticizer, Filler, Stabilizer, Lubricant.
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Re: Materials Science C
Well, this forum seems a little dead, so I'll revitalize it.
A plasticizer makes a material less brittle, a filler (name is a bit self-explanatory) fills gaps, a stabilizer prevents the breakdown of an emulsion (from what I've learned liquid-liquid colloids are insanely unstable) and a lubricant decreases friction. Is it right?IcsTam wrote:Describe the function of each of the following: Plasticizer, Filler, Stabilizer, Lubricant.
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Re: Materials Science C
So for filler, I would specify that it improves tensile strength and directional stability in the polymer. Otherwise, that's right! Your turnJavaScriptCoder wrote:Well, this forum seems a little dead, so I'll revitalize it.
A plasticizer makes a material less brittle, a filler (name is a bit self-explanatory) fills gaps, a stabilizer prevents the breakdown of an emulsion (from what I've learned liquid-liquid colloids are insanely unstable) and a lubricant decreases friction. Is it right?IcsTam wrote:Describe the function of each of the following: Plasticizer, Filler, Stabilizer, Lubricant.
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Re: Materials Science C
To speed things up can we post and answer simultaneously and if the answer is incorrect, correct them later? Because this thread is going kinda slowly
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Re: Materials Science C
Works for me, I definitely want this to move fasterName wrote:To speed things up can we post and answer simultaneously and if the answer is incorrect, correct them later? Because this thread is going kinda slowly
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Re: Materials Science C
Ok, name this chemical (I think it could be covered in materials science):IcsTam wrote:So for filler, I would specify that it improves tensile strength and directional stability in the polymer. Otherwise, that's right! Your turnJavaScriptCoder wrote:Well, this forum seems a little dead, so I'll revitalize it.
A plasticizer makes a material less brittle, a filler (name is a bit self-explanatory) fills gaps, a stabilizer prevents the breakdown of an emulsion (from what I've learned liquid-liquid colloids are insanely unstable) and a lubricant decreases friction. Is it right?IcsTam wrote:Describe the function of each of the following: Plasticizer, Filler, Stabilizer, Lubricant.
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Re: Materials Science C
Benzoyl CyanideJavaScriptCoder wrote:Ok, name this chemical (I think it could be covered in materials science):IcsTam wrote:So for filler, I would specify that it improves tensile strength and directional stability in the polymer. Otherwise, that's right! Your turnJavaScriptCoder wrote:Well, this forum seems a little dead, so I'll revitalize it.
A plasticizer makes a material less brittle, a filler (name is a bit self-explanatory) fills gaps, a stabilizer prevents the breakdown of an emulsion (from what I've learned liquid-liquid colloids are insanely unstable) and a lubricant decreases friction. Is it right?
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Re: Materials Science C
Very well, I'll give that to you. The IUPAC name is technically phenylglyoxylnitrile but it is more commonly known as that. Your turn (make sure to include your question in the answer so it goes faster).IcsTam wrote:Benzoyl CyanideJavaScriptCoder wrote:Ok, name this chemical (I think it could be covered in materials science):IcsTam wrote:
So for filler, I would specify that it improves tensile strength and directional stability in the polymer. Otherwise, that's right! Your turn
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