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Addition / Chain-Growth
Poly-
ethylene
Simplest chain
Atactic
PP
Random coil
Isotactic
PP
3₁ helix
Syndiotactic
PP
TTGG helix
Atactic
PS
Random coil
Isotactic
PS
3₁ helix
PVC
Atactic
PMMA
Atactic
PTFE
13₆ helix
Poly-
isoprene
cis-1,4
pHEMA
Hydroxyethyl
Condensation / Step-Growth
Isotactic
PLA
10₃ helix
Nylon
6,6
Extended
PDMS
4₁ helix
PEO
7₂ helix
PET
Aromatic ester
PEEK
3 rings/mer
Conformation
🔷 Crystal
☁ Amorphous
Chain Length (N mer units)
N =
30
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Si
Structure Info
Polymer
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Formula
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Synthesis
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Conformation
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Tg
—
Tm
—
Density
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PE · All-trans planar zigzag
⚠ Large chain — reduced render quality
Structural Formula
1 Repeat Unit
Chain (10 mers)
Thermal Properties — Tg vs Tm
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