Of what importance is molecular weight when one is concerned with the physical properties of polymers?
Of what importance is molecular weight when one is concerned with the physical properties of polymers?
Homework Answers
Physical properties are depends on molecular weight of molecules..so if there is increase or decrease in molecular weight also change in it's physical properties.
e.g. boiling point of molecule increase with increase in Mass.
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Of what importance is molecular weight when one is concerned
with the physical properties of polymers?
The physical properties of polymers depend on which of the followings: 1. average molecular mass of...
The physical properties of polymers depend on which of the followings: 1. average molecular mass of a chain 2. the strength of intermolecular forces 3. the reaction temperature during synthesis 4. the degree of crystallinity 5. the reaction pressure A) 1,2 and 4 B) 2,3 and 4 C) 1,2 and 5 D) 3,4 and 5 E) 2,4 and 5
Polymers principles Given the following information, calculate the number-average molecular weight, the weight-average molecular weight, and...
Polymers principles
Given the following information, calculate the number-average molecular weight, the weight-average molecular weight, and the molecular weight distribution:
you need to make a new linear, high molecular weight, poly(amide) – Give the structures of the polymers that could be fo...
you need to make a new linear, high molecular weight,
poly(amide) –
Give the structures of the polymers that could be formed from
the following monomers and in each case identify the repeating
unit.
Lecture 9 Activity: you need to make a new linear, high molecular weight, poly(amide) Give the structures of the polymers that could be formed fromm the following monomers and in each case identify the repeating unit. - 1.H2N NH2C CI он OH HO Cl Cl
Lecture...
solve ?? 6. (15 pts) Polymers, sterilization & biocompatibility. You are testing recycled polymers for use as blood storage bags. The main material is a low molecular weight polyfethylene). Wh...
solve ??
6. (15 pts) Polymers, sterilization & biocompatibility. You are testing recycled polymers for use as blood storage bags. The main material is a low molecular weight polyfethylene). What sterilization methods are compatible with this product and why? What in vitro tests will you conduct on these materials and what are acceptable results? If your purchasing controls state that your recycled PE must have a minimum Mw of 92kDa, is it ok to use this batch of material? #...
Please show full work when solving Molecular Structure and Physical Properties Consider the following statements and...
Please show full work when solving
Molecular Structure and Physical Properties Consider the following statements and determine which are true and which are false. Silane (SiH4) is a non-polar molecule. Selenium tetrafluoride (SeF4) is a non-polar molecule. The formal oxidation state of an atom in a molecule (or molecular ion) can be calculated as: (the number of valence electrons on a free atom) minus (half the number of electrons in bonds to that atom) minus (the number of unshared electrons...
1. When using SDS-PAGE, proteins will be separated on the basis of what physical property? 2. ...
1. When using SDS-PAGE, proteins will be separated on the basis of what physical property? 2. You are given two proteins, one with a molecular weight of 67,435 Daltons and other with a molecular weight of 21,345 Daltons. Which protein will move further in the SDS-PAGE?
In general, as the molecular weight of a sample increases, its strength properties such as Young's...
In general, as the molecular weight of a sample increases, its strength properties such as Young's modulus and tensile strength: A) There is no relationship between these properties B) Decrease C) Increase Save Question 33 (1 point) A polymer sample cooled slowly from 160°C to room temperature using natural convection is likely to be: A) 100% crystalline B) Semi-crystalline C) Transparent D) Semi-conducting E) 100% amorphous
Difference in the molecular weight of formaldehyde compared to similar compounds—How does this difference affect properties...
Difference in the molecular weight of formaldehyde compared to similar compounds—How does this difference affect properties (e.g., solubility) to change the range of uses?
7. How would polymer molecular weight affect the adhesion properties of wood adhesives? (10 pts)
7. How would polymer molecular weight affect the adhesion properties of wood adhesives? (10 pts)
What is the empirical and molecular formula ? What is the molecular weight ? Computer Unknown...
What is the empirical and molecular formula ? What is the
molecular weight ?
Computer Unknown #6 Physical Properties 210 200 BP 131-133 °C White solid Sweet odor C 79.22 % H = 5.70% 190 Sodium Fusion Tests Suurvable cha pordion of the sodium fusion filtrate was treated with ferrous state and heated. It was then acidified with dilute sulfuric acid. No observable and was noticed. Another portion of the sodium fusion filtrate was treated with lead acetate. No observable...
Polymers principles
Given the following information, calculate the number-average molecular weight, the weight-average molecular weight, and the molecular weight distribution:
you need to make a new linear, high molecular weight,
poly(amide) –
Give the structures of the polymers that could be formed from
the following monomers and in each case identify the repeating
unit.
Lecture 9 Activity: you need to make a new linear, high molecular weight, poly(amide) Give the structures of the polymers that could be formed fromm the following monomers and in each case identify the repeating unit. - 1.H2N NH2C CI он OH HO Cl Cl
Lecture...
solve ??
6. (15 pts) Polymers, sterilization & biocompatibility. You are testing recycled polymers for use as blood storage bags. The main material is a low molecular weight polyfethylene). What sterilization methods are compatible with this product and why? What in vitro tests will you conduct on these materials and what are acceptable results? If your purchasing controls state that your recycled PE must have a minimum Mw of 92kDa, is it ok to use this batch of material? #...
Please show full work when solving
Molecular Structure and Physical Properties Consider the following statements and determine which are true and which are false. Silane (SiH4) is a non-polar molecule. Selenium tetrafluoride (SeF4) is a non-polar molecule. The formal oxidation state of an atom in a molecule (or molecular ion) can be calculated as: (the number of valence electrons on a free atom) minus (half the number of electrons in bonds to that atom) minus (the number of unshared electrons...
In general, as the molecular weight of a sample increases, its strength properties such as Young's modulus and tensile strength: A) There is no relationship between these properties B) Decrease C) Increase Save Question 33 (1 point) A polymer sample cooled slowly from 160°C to room temperature using natural convection is likely to be: A) 100% crystalline B) Semi-crystalline C) Transparent D) Semi-conducting E) 100% amorphous
7. How would polymer molecular weight affect the adhesion properties of wood adhesives? (10 pts)
What is the empirical and molecular formula ? What is the
molecular weight ?
Computer Unknown #6 Physical Properties 210 200 BP 131-133 °C White solid Sweet odor C 79.22 % H = 5.70% 190 Sodium Fusion Tests Suurvable cha pordion of the sodium fusion filtrate was treated with ferrous state and heated. It was then acidified with dilute sulfuric acid. No observable and was noticed. Another portion of the sodium fusion filtrate was treated with lead acetate. No observable...
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