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

Author Question: Discuss the physical, chemical, and mechanical properties of PMMA compared to polystyrene. What ... (Read 59 times)

CharlieWard

  • Hero Member
  • *****
  • Posts: 578
on: Aug 19, 2018
Discuss the physical, chemical, and mechanical properties of PMMA compared to polystyrene.
 
  What will be an ideal response?

Question 2

What is the origin of the vast differences in physical properties between PVC (rigid) and vinyl? Explain why PE is not treated in the same way to create two very different physical states.
 
  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

brittiany.barnes

  • Sr. Member
  • ****
  • Posts: 321
Reply #1 on: Aug 19, 2018
Answer to Question 1

PMMA and PS are both clear, noncrystalline materials that are extensively used when clarity is important. PMMA has much better clarity retention and weatherability. PS will yellow readily and embrittle. PMMA and PS are both brittle, although PMMA is somewhat stronger. Both materials are solvent sensitive with PS being much more sensitive to aromatic solvents.

Answer to Question 2

The cause of the differences is due to the plasticizers that are in place in the vinyl. These plasticizers allow for greater movement between the chains and give the feel of being much more flexible. PE is not treated the same way because PE is does not react with or accept plasticizers or solvents of any kind.


CharlieWard

  • Member
  • Posts: 578
Reply 2 on: Aug 19, 2018
:D TYSM

alexanderhamilton

  • Member
  • Posts: 334
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

Did you know?

Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.

Did you know?

Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

Coupling of electrical and mechanical activity in the mammalian heart. Coupling of electrical and mechanical activity in the mammalian heart.
Bonding Partners and Energy May Change in a Chemical Reaction Bonding Partners and Energy May Change in a Chemical Reaction
Chemical structure of lipids Chemical structure of lipids
Physical fitness is part of an emerging value cluster. Physical fitness is part of an emerging value cluster.
Anaerobic glycolysis Chemical Equation Anaerobic glycolysis Chemical Equation
Planet Earth compared to all its water and air! Planet Earth compared to all its water and air!
Video: Acids and bases - definition

For a complete list of videos, visit our video library