Free volume of cyanate resins studied by positron annihilation |
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| Authors: | T. Suzuki Y. Oki M. Numajiri T. Miura K. Kondo N. Oshima T. Hayashi H. Nakamura Y. Ito |
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| Affiliation: | (1) National Laboratory for High Energy Physics, 305 Tsukuba, Ibaraki, (Japan);(2) The Graduate University for Advanced Studies, 305 Tsukuba, Ibaraki, (Japan);(3) Fine Chemicals Research Laboratory, Sumimoto Chemical, 300-32 Tsukuba, (Japan);(4) RCNST, The University of Tokyo, c/o JEARI, Tokai-mura, 319-11 Ibaraki, (Japan) |
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| Abstract: | The polymerization process of bisphenol-A dicyanate (BADCy) has been studied using a positron-annihilation lifetime technique (PAL). The polymerization was conducted at 150°C, and the process was followed by PAL. Seven kinds of samples with different curing times were also formed at 150°C, and the relation between the period of the curing time and the degree of polymerization was studied. It has been shown that theo-Ps lifetime increases in samples with a higher polymerization than 85%, which is consistent with measurements of the specific volume of BADCy. |
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