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

Author Question: Describe the key features of a polymer that would make it electrically conductive. What will be ... (Read 30 times)

jho37

  • Hero Member
  • *****
  • Posts: 531
on: Aug 19, 2018
Describe the key features of a polymer that would make it electrically conductive.
 
  What will be an ideal response?

Question 2

What is the limiting oxygen index (LOI)? Which burns more easily, a material with an LOI of 21 or of 17?
 
  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

billybob123

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Aug 19, 2018
Answer to Question 1

Electrical conductivity results from the ability of electrons to move freely within the material's structure. This can occur in polymers when the electrons are delocalized. One method to achieve delocalization is when the bonds in the polymer are conjugated double bonds. Another method to achieve conductivity is to add a conductive filler to the plastic material.

Answer to Question 2

The LOI is a test for flammability of a plastic sample. In this test the sample is supported in a candle-like arrangement and ignited. The composition of the gases surrounding the burning sample is controlled and gradually the amount of oxygen is reduced or increased until the sample will just barely burn. That level of oxygen is called the limiting oxygen index. The sample with an LOI of 17 is more easily burned.


jho37

  • Member
  • Posts: 531
Reply 2 on: Aug 19, 2018
Great answer, keep it coming :)

ASDFGJLO

  • Member
  • Posts: 335
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

There are more sensory neurons in the tongue than in any other part of the body.

Enzymatic features of DNA polymerase that account for its inability to copy one of the DNA strands a Enzymatic features of DNA polymerase that account for its inability to copy one of the DNA strands a
Pierolapithecus catalunicus may be an ancestor of great apes and humans. Its postcranial skeleton sh Pierolapithecus catalunicus may be an ancestor of great apes and humans. Its postcranial skeleton sh
The strange situation. The Strange Situation features a series of episodes in which (a) the mother l The strange situation. The Strange Situation features a series of episodes in which (a) the mother l
This girl’s photo illustrates the main features of fetal alcohol syndrome, including a flat nasal ... This girl’s photo illustrates the main features of fetal alcohol syndrome, including a flat nasal ...
To help make good electrical contact with the terminals without doing any harm, select the ... To help make good electrical contact with the terminals without doing any harm, select the ...
To make a 3.00 m solution, one could take 3.00 moles of solute and add To make a 3.00 m solution, one could take 3.00 moles of solute and add
Video: Retina

For a complete list of videos, visit our video library