Poly(vinyl alcohol) (PVA) was reacted with strong base NaH to convert its pendant hydroxy to oxy anions, followed with nucleophilic addition to buckminster-fullerene-C60. The resulted PVA(C60-Na+)n products were then converted to PVA(C60H)n by stirring with a strong acid cation exchanger of the H+ form. The reduced viscosities of PVA(C60H)n decreases with amount of C60, and are between 0.38 and 0.66 dL/g compared to 1.97 dL/g of the original PVA. Repeated photocrosslinking under 300 nm light and photocleavage under 254 nm light of these C60-containing PVAs were investigated in DMSO by tracing their UV absorption variations at 325 nm (maximum absorption of C60H). It is confirmed that both PVA(C60H)n exhibit excellent reversibility at least under the observed three cycles.
|Number of pages||7|
|Journal||Journal of Applied Polymer Science|
|Publication status||Published - 1998 Oct 17|
All Science Journal Classification (ASJC) codes
- Surfaces, Coatings and Films
- Polymers and Plastics
- Materials Chemistry