EMA lecture 3

Question 1

What are resin codes and whats the common misconception?

Answer 1

resin codes describe the material type and dont indicate recyclability

Question 2

what is the diffrence between cold crystalization and hot crystalization

Answer 2

CC: crystals form upon heating from below Tg HC: crystals form during cooling from a melted state

Question 3

what are the two major types of polymerization

Answer 3

Chain growth and step growth

Question 4

what is polymerization

Answer 4

a reaction where many small molecules, called monomers, combine to form a large molecule, called a polymer, with repeating structural units

Question 5

chain growth polymerization

Answer 5

monomers disappear late, monomers stick together to form chains, faster process

Question 6

step growth polymerization

Answer 6

monomers dissapear early, slower process, only the ends of the chains react, more like leggos