Polymerization of Epoxy Resins Studied by Positron Annihilation |
| T. Suzukia, T. Hayashib and Y. Itoc a High Energy Accelerator Research Organization, Tskuba, Ibaraki, 305-0801, Japan b Fine Chemicals Research Laboratory, Sumitomo Chemical, Tskuba, 300-32, Japan c RCNS, University of Tokyo, Tokai, Ibaraki 319-1106, Japan |
| Full Text PDF |
| The polymerization process of epoxy resins (bisphenol-A dicyanate) was studied using positron-annihilation lifetime spectroscopy. The polymerization from monomer to polymer through a polymerization reaction was followed by positron-annihilation lifetime spectroscopy measurements. Resins kept at curing temperatures (120, 150, and 200°C) changed form from a powder to a solid through a liquid. The size of the intermolecular spaces of the solid samples increased along with the progress of polymerization. |
| DOI: 10.12693/APhysPolA.95.671 PACS numbers: 78.70.Bj, 83.80.Cq |