This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Discuss the implications in MWD when the number average molecular weight and the weight average ... (Read 107 times)

madam-professor

  • Hero Member
  • *****
  • Posts: 584
on: Aug 19, 2018
Discuss the implications in MWD when the number average molecular weight and the weight average molecular weight are widely different.
 
  What will be an ideal response?

Question 2

What is the relationship between melt index and viscosity? Explain the relationship using microstructure concepts.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

rekilledagain

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Aug 19, 2018
Answer to Question 1

If all the polymers were the same length, the number and weight average molecular weights would be the same. Therefore, when the number and weight averages are vastly different, it implies that the molecular weights are also vastly different and that the MWD is wide.

Answer to Question 2

Melt index is a measure of a polymer's ability to flow through an orifice within a given time. Time through the orifice gives insight as to the chain length and structure. Viscosity also measures chain length and structure as an interaction between the measuring device and the viscous fluid.


madam-professor

  • Member
  • Posts: 584
Reply 2 on: Aug 19, 2018
:D TYSM

bigsis44

  • Member
  • Posts: 317
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Ethics in Molecular Biotechnology Ethics in Molecular Biotechnology
Assessing Height & Weight Assessing Height & Weight
(a) The low-resolution signal has the same number of pulses as the engine has cylinders. (b) A ... (a) The low-resolution signal has the same number of pulses as the engine has cylinders. (b) A ...
The diminishing effects on body weight of a low-calorie diet and a high-calorie diet. The diminishing effects on body weight of a low-calorie diet and a high-calorie diet.
A Healthy Body Weight A Healthy Body Weight
Number of cells in the brain Number of cells in the brain
Video: Supine Position

For a complete list of videos, visit our video library