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Chemistry Class 12 > Polymers > Flashcards

Polymers Flashcards

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1
Q

Nylon - 6,6 monomer

A

Hexamethylene diamine and adipic acid

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2
Q

Nylon - 6,6 polymer type

A

Condensation polymer

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3
Q

polythene polymer type

A

Addition polymer

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4
Q

Rayon

A

Cellulose acetate

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5
Q

Classification based on source

A

Natural, semi-synthetic, synthetic

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6
Q

Natural polymers

A

Cellulose, rubber, starch, resins, proteins

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7
Q

Semi-synthetic polymers

A

Rayon, cellulose nitrate, cellulose xanthate

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8
Q

Synthetic polymer

A

Polythene, Nylon - 6,6, Buna-S

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9
Q

Synthetic rubber

A

Buna-S

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10
Q

Classification based on structure

A

Linear, branched chain, cross linked/network

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11
Q

Linear polymers

A

High density polythene, PVC, polyester

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12
Q

Branched chain polymer

A

Low density polythene

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13
Q

Cross linked/network polymers

A

Bakelite, melamine

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14
Q

Bonding in cross linked polymers

A

Strong covalent bonds

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15
Q

Cross linked polymers are formed from

A

bi-functional and tri-functional monomers

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16
Q

Classification based on mode of polymerisation

A

Addition polymers (homo+co), Condensation polymers

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17
Q

Buna-S

A

Styrene + 1,3-Butadiene

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18
Q

Homopolymers

A

Polythene

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19
Q

Copolymers

A

Buna-S, Buna-N

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20
Q

Condensation polymers

A

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

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21
Q

Classification based on molecular forces

A

Elastomers, fibers, thermoplastic polymers, thermosetting polymers

22
Q

Elastomers

A

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

23
Q

Fibers

A

Strong hydrogen bonding, crystalline (polyamide, polyester)

24
Q

Polyamide

A

Nylon-6,6

25
Q

Polyester

A

Terylene/dacron

26
Q

Thermoplastic

A

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

27
Q

Thermosetting

A

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

28
Q

Classification based on growth of polymer chain

A

Addition/Chain growth polymer, Condensation/step growth polymer

29
Q

Addition/chain growth polymers

A

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

30
Q

Condensation/step growth Polymers

A

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

31
Q

Copolymerisation

A

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

32
Q

Natural rubber

A

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

33
Q

Natural rubber is soluble in

A

Non polar solvent

34
Q

Vulcanization of natural rubber

A

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

35
Q

Synthetic rubber

A

Neoprene, Buna-N

36
Q

Neoprene

A

Chloroprene

37
Q

Buna-N

A

1,3-butadiene+acrylonitrile

38
Q

Molecular mass of polymers

A

Always expresed as an average

39
Q

Molecular mass of natural polymers (proteins)

A

Molecular masses are singular and not expressed as average

40
Q

Biodegradable polymers

A

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

41
Q

Nylon-2-Nylon-6

A

Glycine+Amino caproic acid

42
Q

PHBV

A

3-Hydroxybutanoic acid + 3-Hydroxypentanoic acid

43
Q

Glyptal

A

Ethylene glycol+Phthalic acid

44
Q

Orlon/Acrilan

A

Vinyl cyanide (polyacrylonitrile)

45
Q

Terylene/dacron/mylar

A

Ethane-1,2-diol + Terephthalic acid

46
Q

Nylon-6

A

Caprolactum

47
Q

Gutta-Percha

A

Trans- polyisoprene, non elastic, non crystalline

48
Q

Nylon-6-Nylon-10

A

Hexamethylene diamine + Sebacic acid

49
Q

Dynel

A

Copolymer of acrylonitrile and vinyl chloride

50
Q

Thiokol

A

1,2-dichloroethane

Chemistry Class 12 (2 decks)

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