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chem 015 > INTRO TO POLYMER CHEM > Flashcards

INTRO TO POLYMER CHEM Flashcards

1
Q

those that have side-[] chains that are
connected to the main chains.

A

branched

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2
Q

the R group are situated randomly at the alternate sides of the chain

A

Atactic configuration

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3
Q

CLASSIFICATIONS OF POLYMERS ACCORDING TO THERMAL RESPONSE

A

Thermoplastics (thermoplastic polymers)
Thermosets (thermosetting polymers)

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4
Q

modified natural polymers

A

semisynthetic

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5
Q

commercially sold water bottles, soft drink bottles, sport drink bottles, and condiment bottles

A

PET - polyethylene terephthalate

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6
Q

occurs in nature

A

natural

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7
Q

any plastic item not made from other 6 - cd’s, baby bottles, headlight lens

A

O - bisphenol A and others

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8
Q

when all the repeating units along a chain are different

A

Copolymer

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9
Q

those in which the repeat units are joined
together end to end in single chain

A

linear

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10
Q

add monomers to the growing chain.

A

propagation

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11
Q

CLASSIFICATIONS OF POLYMERS ACCORDING TO MOLECULAR STRUCTURE

A

linear
branched
cross-linked
network

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12
Q

Addition or Chain Polymerization Mechanism

A

Initiation
Propagation
termination

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13
Q

can be flexible or rigid is used for plumbing pipes, clear food packaging,

A

PVC - polyvinyl chloride

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14
Q

become permanently hard during formation and do not soften upon heating

A

Thermosets

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15
Q

TYPES OF GEOMETRIC ISOMERS

A

Cis- structure
Trans- structure

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16
Q

An R group is positioned on opposite sides of the double bond

A

Trans- structure

17
Q

are formed from simple addition of monomer molecules to each other in a quick succession by a chain mechanism without the liberation of small molecules.

A

addition polymer

18
Q

milk and juice bottles, detergent, shampoo, grocery bags, cereal box liners

A

PE-HD - polyethylene high density
HDPE

19
Q

yogurt containers, deli containers, furniture, luggage, winter clothing insulation

A

PP - polypropylene

20
Q

dry cleaning bags, bread bags, newspaper bags, paper milk cartons, produce bags, hot/cold beverage cups

A

LDPE - polyethylene low density

21
Q

the R group are situated at the alternate sides of the chain

A

Syndiotactic configuration

22
Q

soften when heated and harden when cooled processes that are totally reversible and may be repeated

A

Thermoplastics

23
Q

is a molecular compound distinguished by a high molar mass, ranging into thousands and millions of grams, and is constructed by the sequential stringing together of smaller molecules called monomers.

A

polymer

24
Q

An R group is positioned on same side of the double bond

A

Cis- structure

25
Q

produces free radicals by breaking down a molecule

A

initiation

26
Q

when two radicals encounter one another and combine. it eliminates both radicals and stop the growth of polymer chain

A

termination

27
Q

adjacent linear chains are joined one to another at various positions by covalent bonds

A

cross-linked

28
Q

when all the repeating units along a chain are of the same type

A

Homopolymer

29
Q

occur between monomers containing polar groups which form polymer along with the elimination of small molecules

A

CONDENSATION POLYMERS

30
Q

the R group are situated at the same side of the chain

A

Isotactic configuration

31
Q

styrofoam - cups, plates, take-out containers

A

PS - polystyrene

32
Q

a three-dimensional [] polymer that is formed from three or more active covalent bonds of multifunctional monomers

A

network

33
Q

synthesized in the lab

A

synthetic

34
Q

CLASSIFICATIONS OF POLYMERS ACCORDING TO ORIGIN:

A

natural, semisynthetic, synthetic

35
Q

CLASSIFICATIONS OF POLYMERS ACCORDING TO MODE OF FORMATION:

A

addition polymers
CONDENSATION POLYMERS
Homopolymer
Copolymer

36
Q

CLASSIFICATIONS OF POLYMERS ACCORDING TO MOLECULAR CONFIGURATION:

A

TYPES OF POLYMERIC STEREOISOMERS
TYPES OF GEOMETRIC ISOMERS

37
Q

TYPES OF POLYMERIC STEREOISOMERS

A

Isotactic configuration
Syndiotactic configuration
Atactic configuration

chem 015 (17 decks)

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