Abstract
In a low-molecular-weight polyethylene-block-poly(ethylene oxide) (PE-b-PEO) diblock copolymer, two pathway-dependent melting processes were observed: Upon slow heating, the PE lamellar crystals melted at ≈97°C into a disordered state. However, when the temperature rapidly jumped to above the melting point (e.g., 100°C), the PE lamellar crystals transformed directly into an ordered lamellar melt, followed by an isothermal conversion into a disordered melt. This isothermal order-to-disorder transition was explained by superheating of the PE crystals using a G-T diagram.
| Original language | English |
|---|---|
| Pages (from-to) | 853-857 |
| Number of pages | 5 |
| Journal | Macromolecular Rapid Communications |
| Volume | 25 |
| Issue number | 8 |
| DOIs | |
| State | Published - Apr 23 2004 |
Keywords
- Diblock copolymers
- Melting point
- Order-to-disorder transition
- Poly(ethylene oxide) (PEO)
- Polyethylene (PE)
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