Polymers part 2 Flashcards by Parul Diwan

Q

Number average

A

(M1n1 + M2n2) /(n1 + n2)

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Q

average weight

A

Mavg = (M1^2 n1 + M2^2n2)/(M1n1 + M2n2)

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Q

PDI =

A

Average weight/number density

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Q

PDI = 1

PDI > 1

A

=1: Homopolymer/Natural polymer

>1: Copolymer

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Q

Polyester 3 examples

A

Dacron, PHBV, Glyptal

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Q

Polyamide 2 examples

A

Nylon 66 , Nylon 6

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Q

Forces order

A

Fibre > Thermosetting > Thermoplastic > Elastomer

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