Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
권호 표지

Elution of Plasticizer fvom PVC Sheet in Alkaline Solutions

알카리수용액중에서 PVC Sheet로부터 가소제의 추출

  • 신선명 (한국지질자원연구원 자원활용연구부) ;
  • 전석호 (한국지질자원연구원 자원활용연구부) ;
  • 한오형 (조선대학교 자원공학과)
  • Published : 2002.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

PVC sheet was treated in O~10M NaOH solutions at $80~150^{\circ}C$ for O~7 hour, in order to study the leaching phenomena of plasticizer. The yield of phthalic acid produced by hydrolysis of DOP was increased greatly with increasing temperature and NaOH concentration by accelerating of alkali catalyst. The yield of phthalic acid was reached ca. 100% in 10M NaOH at $150^{\circ}C$ over 3 hours. Therefore, the plasticizer containing 30% in PVC sheet could be hydrolyzed in alkali solutions before the occurrence of dehydrochlorination. Besides, in the thermal reaction, the pores were produced in the PVCsheet by the hydrolysis of DOP.

PVC(polyvinyl chloride)sheet를 NaOH수용액 중에서 반응온도 $80~150^{\circ}C$, 반응시간 0~7시간으로 처리하여 가소제의 침출에 관해서 검토하였다. DOP의 가수분해에 의해서 생성된 프탈산 수율은 알카리촉매로써 NaOH농도의 증가와 온도의 상승으로 인해 증가하고, $150^{\circ}C$, 10M NaOH, 3시간이상에서 프탈산 수율은 거의 100%,에 달했다. 따라서 PVC sheet에 30% 포함되어져 있는 가소제는 알카리수용액 중에서 탈염화수소가 일어나기 이전에 가수분해되어졌다. 또한, PVC필름의 수열처리에서는 DOP의 가수분해로 인해 세공이 생성되었다.

Keywords

References

  1. Talamini, G. and Pezzin, G., 'Kinetic study on the reaction of polyvinyl chloride thermal dehydrochlorination' Macromol. Chem., 39, 26 (1960) https://doi.org/10.1002/macp.1960.020390103
  2. 吉岡敏明, 安田眞也, 川村邦男, 佐藤次雄, 奧脇昭嗣, '高溫アルカリ水溶液におけるポリ鹽化ビニル粉未の酸素酸化', 日本化學會, 1, 532 (1992)
  3. T. Yoshioka, K. Furukawa, S. Yasuda, T. Sato, A. Okuwaki, 'Chemical Recycling of Poly (Vinyl Chloride) to Oxalic Acid and Benzenecarboxylc Acids by Oxygen Oxidation in Alkaline Solutions at High Temperatures' The 2nd Int. Symp. on East Asian Resources Recycling Technology, 100 (1993)
  4. T. Yoshioka, A. Hasome, S. Watanabe, S. M. Shin, A. Okuwaki and H. Mametsuka, 'Determination of Oxalic Acid and Benzenecarboxylc Acids from PVC Materials by Oxygen Oxidation in NaOH Solutions at Elevated Temperatures' Proc., The 2nd Int., Conf. Solvo-Thermal React., 18 (1996)
  5. Shun-Myung Shin, T. Yoshioka and A. Okuwaki, 'Dehydrochlorination Behavior of Rigid PVC Pellet in NaOH Solutions at Elevated Temperature' Polymer Degradation and sta., 61, 2, 349-353 (1998) https://doi.org/10.1016/S0141-3910(97)00221-8
  6. Shun-Myung Shin, T. Yoshioka and A. Okuwaki, 'Dehydrochlorination Behavior of Flexible PVC Pellets in NaOH Solutions at Elevated Temperature' J. Appli. Polym. Sci., 67, 2171-2177 (1998) https://doi.org/10.1002/(SICI)1097-4628(19980328)67:13<2171::AID-APP7>3.0.CO;2-B
  7. 三方信行 '潛プラ油化處理技術の現像と展望' 工業技術會, 東京, 6-1 (1994)