各種キュア条件におけるDMEU樹脂剤とセルロース繊維との反応

抄録

The relation between the curing condition and the cross-linking structure has been studied for rayon, mercerized cotton and cotton fabrics finished with DMEU resin under various conditions of curing time, temperature and catalysts. From the results obtained, the reactions between DMEU resin and cellulose were discussed.
The competitive reactions between condensation reaction of resin itself and cross-linking reaction of the resin with cellulose were elucidated from the quantities of Cell-OCH₂-N and N-CH₂OCH₂-N during DMEU resin finishing. These reactions were affected by temperature, and the type and concentration of the catalysts. In general, higher temperature and higher acidity of catalyst were in favour of the cross-linking reaction between resin and cellulose, and tended to form the cross-links of shorter length. It was also found that the condensation reaction of resin itself was initiated with the formation of N-CH₂OCH₂-N and followed by the decomposition of N-CH₂OCH₂-N into N-CH₂-N and free CH₂O. The later stage of the reaction was influenced by the curing temperature and the catalyst.
Different types of cellulose, such as rayon, cotton and mercerized cotton, showed a similar reaction mechanism, but the rate of reaction and the length of cross-links were varied. It was found that the reaction rate was the highest for rayon, modest for the mercerized cotton, and the lowest for cotton. On the contrary, in terms of the length of cross-links formed, cotton showed the greatest, and the mercerized cotton came next which was followed by rayon.