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dfdsfadsf > O'chem 2 test 1 > Flashcards

O'chem 2 test 1 Flashcards

1
Q

polymer

A

a large molecule made of many smaller units chemically bonded

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2
Q

monomer

A

the units which are chemically bonded to make a polymer

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3
Q

synthetic polymer

A

plastics, foams, and rubbers not found in biological systems

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4
Q

chain-growth polymers

A

polymers made by linking monomer units 1 at a time via an addition reaction; with no loss of any byproduct molecule; also called addition polymers

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5
Q

step-growth polymers

A

polymers made by linking difunctional monomer units

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6
Q

difunctional compound

A

a compound having 2 functional groups

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7
Q

free radical

A

any species with an unbonded, unpaired electron

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8
Q

initiation step

A

the reaction producing a free radical species to trigger the propagation step

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9
Q

propagation step

A

the reactions producing the desired product plus more free radicals

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10
Q

termination step

A

the reaction consuming free radicals when the reactant has been doubled

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11
Q

initiator

A

the free radical precursor added to an unsaturated monomer to begin FRCGP

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12
Q

organic peroxide

A

a compound with a peroxide group linking two alkyl or aryl groups

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13
Q

radical coupling

A

a termination reaction in which 2 growing polymer chains bond at the free radical end of each chain.

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14
Q

radical disproportionation

A

a termination process in which the free radical electron of one chain takes a hydrogen atom from the C next to the growth end of a 2nd chain, resulting in a saturated C at the end of the 1st chain and a double bond at the end of the 2nd

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15
Q

thiol

A

a compound analogous to an alcohol, but with S in place of O

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16
Q

terminator

A

an additive species which stops chain growth in FRCGP

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17
Q

chain transfer

A

a process initiating growth of another chain somewhere along the length of existing chain, not at its end; also called branching

18
Q

cross linking

A

a process in which 2 polymer chains are chemically bonded side-by-side

19
Q

linear chain growth

A

a process in which a chain grows linearly without branching

20
Q

trimer

A

a polymer containing 3 monomer units

21
Q

dimer

A

a polymer containing 2 monomer units

22
Q

tetramer

A

a polymer containing 4 monomer units

23
Q

thermoplastic

A

a plastic which softens or melts when heated and hardens again on cooling

24
Q

styrofoam

A

PS which has been melted, then infused with gas bubbles to form a lightweight, insulting foam.

25
Q

homopolymer

A

a polymer made of only 1 kind of monomer

26
Q

copolymer

A

a polymer made of more than 1 kind of monomer

27
Q

alternating copolymer

A

copolymer with 2 different monomers units alternating

28
Q

random copolymer

A

copolymer with different monomer units in no certain order

29
Q

block copolymer

A

copolymer with monomers of different kinds in sections

30
Q

monosubstituted vinyl monomer

A

a vinyl group bonded to species other than H

31
Q

-COOH

A

functional groujp for acids; carboxyl group

32
Q

-NH2

A

functional group for amines; amino group

33
Q

rubber

A

a polymer with regularly repeating C-C double bonds

34
Q

1,4 addition

A

the process of addition to butadiene in which the remaining double bond moves from an end carbon to a new position at C-2

35
Q

isolated double bonds

A

double bonds separated by more than 2 single bonds

36
Q

vulcanization

A

reacting isoprene rubber with S to make it resistant to extremes of temp

37
Q

SBR

A

styrene-butadiene rubber, a block copolymer of 1,3 butadiene and styrene

38
Q

neoprene

A

a homopolymer of 2 chloro-1,3 butadiene

39
Q

stereoregular polymer

A

a polymer in which all steroegenic centers have the same configuration

40
Q

HDPE

A

high density polyethylene

41
Q

natural rubber

A

an isoprene polymer of monomer units in the Z-configuration

42
Q

Gutla percha

A

an isoprene polymer of monomer units in the E-configuration

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