Alkali hydrolysis experiment of organic materials such as cement additives

Fukumoto, Masahiro; Nishikawa, Yoshiaki*

JNC TN8400 2001-017, 355 Pages, 2001/03

JNC-TN8400-2001-017.pdf:6.43MB

The alkali hydrolysis experiments which seem to be important from the view point of the alteration mechanism using the following seven organic materials was performed as a part of the evaluation of the influence on the disposal of the organic materials contained in the TRU wastes. As a result of the alkali hydrolysis experiments (90C and 91d), each organic materials became those of lower molecular weight. The degradation products were able to be detected in the solution. The organic materials seem to be degraded to the organic matters which were confirmed in this study in a long term of disposal. The degradation products were shown below. Therefore, the evaluation of the influence on the migration of radionuclides by degradation products becomes important in the future. (1)Cement additives of Naphthalenesulfonic acid and Ligninsulfonic acid ( Naphthalenedisulfonic acid etc.) (2)Cement additives of polycarboxylic acid ( Oligomer of distal methoxypoly ethylene glycol.) (3)Ethylenediamine-N,N,N',N'-tetraacetic acid disodium salt ( Acetic acid desorped and cyclized organic matters from EDTA.) (4)Tributyl phosphate ( Dibutyl phthalate, n-butanol) (5)Poly vinyl acetate ( Acetic acid) (6)Nylon66 ( Adipic acid, Hexamethylenediamine) (7)Cured epoxy resin ( Glycerol poly glycidyl ether, Carboxylic acid)

Modification of particles by radiation polymerization, 1; Graft polymerization of glycidyl methacrylate on surface of Nylon12

*; ; Hagiwara, Miyuki; *; *; *

Zairyo Gijutsu, 2(6), p.366 - 375, 1984/00

no abstracts in English

High temperature properties of nylon 66 annealed in glycerol

*; Kuriyama, Isamu

Reports on Progress in Polymer Physics in Japan, 23, p.249 - 252, 1980/00

no abstracts in English

Preparation of crown ether derivative-impregnated Sr-adsorptive fibers for rapid analysis of Sr-90

Konda, Miki; Asai, Shiho; Hanzawa, Yukiko; Saito, Kyoichi*; Fujiwara, Kunio*; Sugo, Takanobu*; Magara, Masaaki

no journal, , 

The concentration of Sr is normally determined with a beta counter, which involves time-consuming pretreatment procedures. To minimize such pretreatment procedures, an adsorbent achieving high-speed separation would be helpful. Adsorbents prepared by graft polymerization have an ideal surface structure, promoting efficient adsorption of analytes to functional groups of the polymer chain attached through the polymerization reaction. In this study, an extractant for Sr, dicyclohexano-18-crown-6 (DC8C6) was impregnated onto alkylamino-group-introduced graft chains based on hydrophobic interaction. A nylon fiber was employed as a base polymer, which allows to form various shapes according to measurement modes. The amount of impregnated DC8C6 is comparable to those of commercially available Sr adsorbents. This indicates that the prepared fibers have an adequate adsorptivity for Sr ion from a practical perspective.