Polymers part 2 Flashcards
1
Q
Number average
A
(M1n1 + M2n2) /(n1 + n2)
2
Q
average weight
A
Mavg = (M1^2 n1 + M2^2n2)/(M1n1 + M2n2)
3
Q
PDI =
A
Average weight/number density
4
Q
PDI = 1
PDI > 1
A
=1: Homopolymer/Natural polymer
>1: Copolymer
5
Q
Polyester 3 examples
A
Dacron, PHBV, Glyptal
6
Q
Polyamide 2 examples
A
Nylon 66 , Nylon 6
7
Q
Forces order
A
Fibre > Thermosetting > Thermoplastic > Elastomer