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 년도별 목차보기 |
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| 발행년도/권호 |
1994 년 / 권호: V.6,no.1,Mar |
| 논문제목1(원어) |
중성염의 폴리에틸렌 텔레프탈레이트의 알칼리 가수분해 촉진효과에 관한 연구(I) - 양이온의 영향 - |
| 논문제목2(타언어) |
Accelerating Effect of Neutral Salts on Alkaline Hydrolysis of Poly(ethylene terephthalate) (I) - Cationic Effect - |
| 저자(원어) |
도성국 (동아대학교 천연섬유학과) 조환 (영남대학교 섬유공학과) |
| 저자(타언어) |
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| 소속(원어) |
도성국 (동아대학교 천연섬유학과) 조환 (영남대학교 섬유공학과) |
| 소속(타언어) |
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| 시작/끝
페이지 |
33 ~ 43 총페이지 : 11 |
| 언어(원어) |
Korean |
| 초록 |
In the present work, to clarify the mechanism of the neutral salt effect on the alkaline hydrolysis of PET, many salts with different cations like LiCl, NaCl, KCl, CsCl were added to the aqueous alkaline solutions. Then PET was hydrolyzed with aqueous solutions of many salts in alkali metal hydroxides under various conditions. Some conclusions obtained from the experimental results were summarized as follows. The reaction rate of the alkaline hydrolysis of PET was increased by the addition of neutral salts and In k was increased nearly linearly with the square root of ionic strength of reaction medium. This fact suggested that the ionic strength effect by Debye-Huckel and Bronsted theory was exerted on the reaction. The specific salt effect was also observed. The reaction rate was increased with the increase in the electrophilicity of cations of neutral salts, i. e., in the order of / < / / . It was considered that the reaction rate was increased in the order of C . < . . . because the lowering effect of the cations on the negative charge of PET surface was increased with the electrophilicity of cations. It was thought that was increased because the cations of neutral salts decreased the negative charge of PET surface. It, however, was inferred from the increase in S＊ and the decrease in the G＊ that the cations of neutral salts associated with PET increased the collision frequency between carbonyl carbon and OH- ion and then accelerated the reaction rate.te. |
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