O'chem 2 test 1

Question 1

polymer

Answer 1

a large molecule made of many smaller units chemically bonded

Question 2

monomer

Answer 2

the units which are chemically bonded to make a polymer

Question 3

synthetic polymer

Answer 3

plastics, foams, and rubbers not found in biological systems

Question 4

chain-growth polymers

Answer 4

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

Question 5

step-growth polymers

Answer 5

polymers made by linking difunctional monomer units

Question 6

difunctional compound

Answer 6

a compound having 2 functional groups

Question 7

free radical

Answer 7

any species with an unbonded, unpaired electron

Question 8

initiation step

Answer 8

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

Question 9

propagation step

Answer 9

the reactions producing the desired product plus more free radicals

Question 10

termination step

Answer 10

the reaction consuming free radicals when the reactant has been doubled

Question 11

initiator

Answer 11

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

Question 12

organic peroxide

Answer 12

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

Question 13

radical coupling

Answer 13

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

Question 14

radical disproportionation

Answer 14

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

Question 15

thiol

Answer 15

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

Question 16

terminator

Answer 16

an additive species which stops chain growth in FRCGP

Question 17

chain transfer

Answer 17

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

Question 18

cross linking

Answer 18

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

Question 19

linear chain growth

Answer 19

a process in which a chain grows linearly without branching

Question 20

trimer

Answer 20

a polymer containing 3 monomer units

Question 21

dimer

Answer 21

a polymer containing 2 monomer units

Question 22

tetramer

Answer 22

a polymer containing 4 monomer units

Question 23

thermoplastic

Answer 23

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

Question 24

styrofoam

Answer 24

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

Question 25

homopolymer

Answer 25

a polymer made of only 1 kind of monomer

Question 26

copolymer

Answer 26

a polymer made of more than 1 kind of monomer

Question 27

alternating copolymer

Answer 27

copolymer with 2 different monomers units alternating

Question 28

random copolymer

Answer 28

copolymer with different monomer units in no certain order

Question 29

block copolymer

Answer 29

copolymer with monomers of different kinds in sections

Question 30

monosubstituted vinyl monomer

Answer 30

a vinyl group bonded to species other than H

Question 31

-COOH

Answer 31

functional groujp for acids; carboxyl group

Question 32

-NH2

Answer 32

functional group for amines; amino group

Question 33

rubber

Answer 33

a polymer with regularly repeating C-C double bonds

Question 34

1,4 addition

Answer 34

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

Question 35

isolated double bonds

Answer 35

double bonds separated by more than 2 single bonds

Question 36

vulcanization

Answer 36

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

Question 37

SBR

Answer 37

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

Question 38

neoprene

Answer 38

a homopolymer of 2 chloro-1,3 butadiene

Question 39

stereoregular polymer

Answer 39

a polymer in which all steroegenic centers have the same configuration

Question 40

HDPE

Answer 40

high density polyethylene

Question 41

natural rubber

Answer 41

an isoprene polymer of monomer units in the Z-configuration

Question 42

Gutla percha

Answer 42

an isoprene polymer of monomer units in the E-configuration