- Tytuł:
- Free Volume Study on Three Types of Shape Memory Polymers by Positron Annihilation
- Autorzy:
-
Ujihira, Y.
Li, H.-L.
Ito, K. - Powiązania:
- https://bibliotekanauki.pl/articles/2008187.pdf
- Data publikacji:
- 1999-04
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
- 64.70.Pf
- Opis:
- Temperature dependence of nanoscopic environment of shape memory polymers such as polynorbornene (T$\text{}_{g}$≈313 K), polyurethane (T$\text{}_{g}$≈321 K=dynamic viscoelasticity, destruction of hydrogen bond ≈353 K) and styrene-butadiene copolymer (T$\text{}_{m}$=333 K) is observed in terms of free volume parameters - average size, numerical concentration and size distribution - estimated from positronium lifetime measurement, and mechanisms of their shape recoveries are discussed at a molecular level.
- Źródło:
-
Acta Physica Polonica A; 1999, 95, 4; 677-682
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł