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The degree of polymerization(n) is the ratio between Molecular weight(M) and the molar mass of the repeating unit in a polymer(m).
M=n*m
The molar mass(m) of the monomer (styrene) is 104.15 grams/mol
if you are given a Molecular weight, just devide by m, and you've got it!
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Number-average molecular weight of a polypropylene is 1000000 gmol Compute the number-average degree of polymerization?
i got 23765.4
How Degree of polymerization affect to the crystallinity?
Solidification is when you test how hard the mineral is.
Why does fish oil dissolve polystyrene?
Polystyrene is soluble in most oils to a greater or lesser degree, depending upon the particular oil, the temperature and the amount of time it is in contact with the polystyrene.
What is bulk polymerization?
What is bulk polymerization?
Which has more crystalline atactic polystyrene or syndiotactic polystyre?
The atactic polystyrene is more crystalline than the syndiotactic polystyrene.
What is polystyrene made?
Polystyrene is obtained by the polymerization of the monomer styrene.
Which types of polymerization techniques are used to make polystyrene?
Atactic and syndiotactic polymerization.
Number-average molecular weight of a polypropylene is 1000000 gmol Compute the number-average degree of polymerization?
i got 23765.4
How Degree of polymerization affect to the crystallinity?
Solidification is when you test how hard the mineral is.
Why does fish oil dissolve polystyrene?
Polystyrene is soluble in most oils to a greater or lesser degree, depending upon the particular oil, the temperature and the amount of time it is in contact with the polystyrene.
Does polystyrene exhibit yielding?
No, pure Polystyrene (PS) is quite brittle; hence, General Purpose Polystyrene (GPPS) does not yield. It breaks right after passing over its limit. However, the weakness of polystyrene, which is brittleness, is overcome when it is made into High Impact Polystyrene (HIPS). Having a higher breaking strain after polymerization, it is able to yield before breaking. Thus, from this tensile testing experiment, GPPS does not have yield strength, while HIPS has yield strength of 26.175N/mm2.
What can you do with polystyrene?
Polystyrene can be used in various industries like Polystyrene Packaging, Construction, Display, Exhibition, Signs, and all areas of the foam industry. Various different items can be produced from polystyrene. For a complete range and details about products please visit: http://www.polystyrene.uk.com/
What are the most unusual chemical reactions in the world?
This question really doesn't have an answer. Unusual how? One that tends to surprise people is the polymerization of propylene. If you do a free radical polymerization of ethylene, you get polyethylene. If you do a free radical polymerization of styrene, you get polystyrene. But if you try the same thing on propylene, you don't get polypropylene, you get polyethylene. (Despite not being what you might expect at first glance, it's not a mistake or an accident; it does make perfect sense if you think about it carefully.)
How could you determine the degree of polymerization of amylose?
Well,, that's a good one!!! We can measure it spectrophotometrically by measuring the amount of inorganic phosphate released during the reaction. Also we can use Light scattering and Refractive Index analysis to measure the Degree of polymerization of Amylose!!! bhanu1_prakash@yahoo.co.in
Why is polystyrene brittle?
Unfilled polystyrene is also known as crystal polystyrene (PS) or general purpose polystyrene (GPPS). However, since crystal polystyrene is brittle, other polymers are added to polystyrene to improve its strength, and copolymers are formed as a result. One such copolymer is high impact polystyrene (HIPS), which is produced by adding polybutadiene rubber to polystyrene during the polymerization process. HIPS is tougher and has a greater impact strength than unfilled polystyrene. There are different types of polystyrene. Extruded polystyrene (XPS) is one form of the polymer that has high tensile strength, with good elasticity. It is commonly known as Styrofoam™. The other common form of polystyrene is expanded polystyrene (EPS). Both EPS and XPS are made from similar materials but there are difference between the two. XPS has a higher density as compared to EPS, due to the absence of air passages between its cells. The higher density makes XPS more rigid and strong. Also, XPS is waterproof and is an effective thermal insulator. Read more in the related link.
What is bulk polymerization?
What is bulk polymerization?
Is polystyrene biodegradable?
Polystyrene is NOT biodegradable
