Polymerer1

Question 1

PM1-What are polymeric materials/plastics?

Answer 1

defines a polymeric material=Chemistry, Mass, Configuration

Large molecules,
repetitive units (of monomers)

Question 2

PM1-What molecular forces hold a polymer component?

Answer 2

Strong forces C-C (covalent bonds;backbone),
weak forces (van-der-Waals; intermolecular(mellan polymerkedjor))

Question 3

PM1-How do we quantify the size of polymer molecules?

Answer 3

The molecular weight,
number,
weight averages; the polydispersity index (PDI=molecular weight/number average molecular weight)

Question 4

PM1-How are polymers defined in terms of structure/conformation/configuration/arrangement? Tacticy.

Answer 4

Tacticy=
side groups can be attached in different direction to the C-C bone.(samma ämne men olika struktur på sidegroups)
-Syndotactic=varannan,system
-Atactic=random
-Isotactic=alla bara på ovan eller undersidan

Question 5

PM1-What are the main types of polymers based on their molecular arrangement and their characteristics?

Answer 5

Thermoplastic:
-amourphous(random arranged, no supramolacular(VanDerW) structures,spaghetti)
-semicrystalline
(amourphous&crystalline regions, grumlig)
__
Båda fås genom polymerization.
Can be melted and reshaped

Question 6

PM1-Polymerization

Answer 6

Processen: Monomerer binder sig samman genom kemisk reaktion och bildar långa kedjor/nätverk av molekyler som kallas polymerer.

Question 7

PM1-Polymers

Answer 7

Stora molekyler som består av långa kedjore av monomerer

Question 8

PM1-Exempel på polymers

Answer 8

[ H X ]
\ \
- C - C -
\ \
[ H H ] n.

X=H Polyeten(PE)
X=CH3(litet 3)Polypropen(PP)
X=C6(litet)H5(litet)Polystyren(PS)
X=Cl Polyvinylklorid(PVC)
X=OH Polyvinylalkohol(PVAC)

Question 9

PM1-Polydispersity index, PI

Answer 9

Kolla exemplet.
Mn=Summa(niMi)/summa(ni)
Mw=Summa(niMi^2)/summa(ni*Mi)

PI=Mn/Mw,
if PI=1 monodisperse
if PI>1 polydisperse

Question 10

PM1-How are polymers defined in terms of structure/conformation/configuration/arrangement? Homopolymers, copolymers.

Answer 10

Homopolymers=en typ av monomer.
Copolymers=en eller flera monomerer. 4 typer:
-random copolymers(random)
-alternating copolymers(varannan)
-block copolymers(5-5-…)
-graft copolymers(grenar av annan monomer vertikalt)

Question 11

PM1-How are polymers defined in terms of structure/conformation/configuration/arrangement? Topology/branching.

Answer 11

Samma ämne men:
-High density-linear/short chain branched
-Low density-branched molecules
-Linear low density-short chain branched(fler än high)

Question 12

Types of bio-alternatives to synthetic plastics

Answer 12

Papper med bilden av 4 rutor.

Question 13

Transition temperatures in polymeric materials by tupe (use the temperature sweep test representations)

Answer 13

Tm= melting temperature
Tg= glass transition temperature