How are crystalline and amorphous polymers different? Write about the properties and applications of any : - Four Crystalline polymers Four Amorphous polymers (7 Marks)
a-In polymers, why is thermal conductivity different in crystalline regions, compared to non-crystalline (amorphous) region? b-What is a phonon? How is it related to thermal conductivity?
Describe the difference in the atomic behaviors (specifically viscosity) of crystalline and amorphous ceramics as they heat up. In your own words, compare and contrast the ideas of tempered martensite (metals) -vs- tempered glass (amorphous ceramic).
how is charge separation achieved in crystalline silicon, amorphous silicon and polymer solar cell.
how is charge separation achieved in crystalline silicon, amorphous silicon and polymer solar cell.
regions in polymers make the polymer flexible. Amorphous O Cross linked O Crystalline O Cross linked and crystalline none of these
Describe the crystalline and amorphous states in thermoplastic and thermosetting polymers. How many transitions do take place in those polymers? Do you think that every polymer type has a melting point? why or why not?
PROBLEMS 1. Explain why the ratio of the density of the crystalline regions, Pa, to the density of the amorphous regions, P, is larger for nylon-6,6 than for isotactic polystyrene. L! nit roll in which the
Question 1 (1 point) Which is a single crystal? Steel Silicon wafer Mercury amalgam brass Question 2 (1 point) Which is amorphous (non-crystalline)? Quartz diamond steel window glass Question 1 (1 point) Which is a single crystal? Steel Silicon wafer Mercury amalgam brass Question 2 (1 point) Which is amorphous (non-crystalline)? Quartz diamond steel window glass
When we produced amorphous carbon by pouring concentrated sulfuric acid on sucrose, A) sulfuric acid acted as a catalyst B) we demonstrated that carbohydrates are a mixture of amorphous carbon and water C) we had a precipitation reaction D) sulfuric acid acted as a reactant E) sulfuric acid partly turned into a dark amorphous mass