Polymers

Question 1

Nylon - 6,6 monomer

Answer 1

Hexamethylene diamine and adipic acid

Question 2

Nylon - 6,6 polymer type

Answer 2

Condensation polymer

Question 3

polythene polymer type

Answer 3

Addition polymer

Question 4

Rayon

Answer 4

Cellulose acetate

Question 5

Classification based on source

Answer 5

Natural, semi-synthetic, synthetic

Question 6

Natural polymers

Answer 6

Cellulose, rubber, starch, resins, proteins

Question 7

Semi-synthetic polymers

Answer 7

Rayon, cellulose nitrate, cellulose xanthate

Question 8

Synthetic polymer

Answer 8

Polythene, Nylon - 6,6, Buna-S

Question 9

Synthetic rubber

Answer 9

Buna-S

Question 10

Classification based on structure

Answer 10

Linear, branched chain, cross linked/network

Question 11

Linear polymers

Answer 11

High density polythene, PVC, polyester

Question 12

Branched chain polymer

Answer 12

Low density polythene

Question 13

Cross linked/network polymers

Answer 13

Bakelite, melamine

Question 14

Bonding in cross linked polymers

Answer 14

Strong covalent bonds

Question 15

Cross linked polymers are formed from

Answer 15

bi-functional and tri-functional monomers

Question 16

Classification based on mode of polymerisation

Answer 16

Addition polymers (homo+co), Condensation polymers

Question 17

Buna-S

Answer 17

Styrene + 1,3-Butadiene

Question 18

Homopolymers

Answer 18

Polythene

Question 19

Copolymers

Answer 19

Buna-S, Buna-N

Question 20

Condensation polymers

Answer 20

terylene(dacron), nylon-6,6, nylon-6

Question 21

Classification based on molecular forces

Answer 21

Elastomers, fibers, thermoplastic polymers, thermosetting polymers

Question 22

Elastomers

Answer 22

Weak van der Wall forces (Buna-S, Buna-N, neoprene)

Question 23

Fibers

Answer 23

Strong hydrogen bonding, crystalline (polyamide, polyester)

Question 24

Polyamide

Answer 24

Nylon-6,6

Question 25

Polyester

Answer 25

Terylene/dacron

Question 26

Thermoplastic

Answer 26

Intermolecular forces are in between elastomers and fibers, no cross linking, capable of softening on heating and hardening on cooling (polythene, polystyrene, polyvinyls)

Question 27

Thermosetting

Answer 27

Heavily branched and cross linked, infusible 3D network solid, cannot be reused (Bakelite, urea formaldehyde resin)

Question 28

Classification based on growth of polymer chain

Answer 28

Addition/Chain growth polymer, Condensation/step growth polymer

Question 29

Addition/chain growth polymers

Answer 29

LDP, HDP, PTFE(Teflon), Polyacrylonitrile(PAN)

Question 30

Condensation/step growth Polymers

Answer 30

Terylene/dacron(polyester), Nylons(polyamides), Novolac, Bakelite (Phenol+formaldehyde), Melamine(Melamine+formaldehyde)

Question 31

Copolymerisation

Answer 31

Styrene butadiene rubber (SBR is more flexible than polybutadiene and tougher than polystyrene(homopolymers))

Question 32

Natural rubber

Answer 32

Linear hydrocarbon polymer of isoprene (cis-1,4-polyisoprene)

Question 33

Natural rubber is soluble in

Answer 33

Non polar solvent

Question 34

Vulcanization of natural rubber

Answer 34

Rubber+ sulphur(5%) at 373 to 415K, Sulphur froms cross links at double bond sites, rubber becomes more hard and flexible

Question 35

Synthetic rubber

Answer 35

Neoprene, Buna-N

Question 36

Neoprene

Answer 36

Chloroprene

Question 37

Buna-N

Answer 37

1,3-butadiene+acrylonitrile

Question 38

Molecular mass of polymers

Answer 38

Always expresed as an average

Question 39

Molecular mass of natural polymers (proteins)

Answer 39

Molecular masses are singular and not expressed as average

Question 40

Biodegradable polymers

Answer 40

Nylon-2-Nylon-6, Polybetahydroxybutyrate-co-p-hydroxyvalerate(PHBV)

Question 41

Nylon-2-Nylon-6

Answer 41

Glycine+Amino caproic acid

Question 42

PHBV

Answer 42

3-Hydroxybutanoic acid + 3-Hydroxypentanoic acid

Question 43

Glyptal

Answer 43

Ethylene glycol+Phthalic acid

Question 44

Orlon/Acrilan

Answer 44

Vinyl cyanide (polyacrylonitrile)

Question 45

Terylene/dacron/mylar

Answer 45

Ethane-1,2-diol + Terephthalic acid

Question 46

Nylon-6

Answer 46

Caprolactum

Question 47

Gutta-Percha

Answer 47

Trans- polyisoprene, non elastic, non crystalline

Question 48

Nylon-6-Nylon-10

Answer 48

Hexamethylene diamine + Sebacic acid

Question 49

Dynel

Answer 49

Copolymer of acrylonitrile and vinyl chloride

Question 50

Thiokol

Answer 50

1,2-dichloroethane