VAPOUR ABSORPTION IN MELAMINE-FORMALDEHYDE RESIN |
| J. Wawryszczuk, K. Ciesielski Institute of Physics, Maria Curie-Skłodowska University, Pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland and J. Goworek Faculty of Chemistry, Maria Curie-Skłodowska University, Pl. M. Curie-Skłodowskiej 3, 20-031 Lublin, Poland |
| Full Text PDF |
| The effects of vapour absorption on positron annihilation in cross-linked polymer were investigated. Contrary to linear polymers, absorption of vapour in cross-linked resin leads to the shortening of o-Ps lifetime. In vacuum absorbed molecules diffuse out. At room temperature desorption of hexane and hexanol is not complete; full elimination of absorbed molecules requires sample temperature increase. |
| DOI: 10.12693/APhysPolA.99.523 PACS numbers: 78.70.Bj, 36.10.Dr, 61.41.+e, 66.30.-h |