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> 한국공업화학회 > 응용화학 > 7권 1호

수분산 폴리우레탄의 사슬연장 반응에 관한 연구

Studies on the Chain Extension Reaction of Aqueous Polyurethane Dispersion

공현철 ( Hyun Chul Kong ) , 정인우 ( In Woo Cheong ) , 김중현 ( Jung Hyun Kim )

- 발행기관 : 한국공업화학회

- 발행년도 : 2003

- 간행물 : 응용화학, 7권 1호

- 페이지 : pp.13-16 ( 총 4 페이지 )


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논문제목
초록(외국어)
In the synthesis of water-based polyurethane using self-emulsification process, afterbeing neutralized polyurethane pre=polymers containing ionic pendant groups are dispersed by simple convective mixing Preparation of dispersion is followed by chain extension reaction, which is considered as important step for growth of the molecular weight of polyurethane, In this work pH variations in the aqueous phasa were monitored during the chain extension process in the presence of water-soluble diamines. The optimum degree of chain extension and the average prrticle size in the polyurethane dispersions were examined with varying ionic pendent group contents, type of chain extenders, and feed reat of chain extenders.The initial pH value in the aqueous phase linearly increased andthe optimum chain extension point could be obtained from the intersection of two linear lines having different slopes. All averge particle sizes before chain extension reaction were almost same, howeve,the final averge particle size increased as feed rates of chain extenders incerased. In addition as the ionic pendant group contents increased, the particle size decreased since the hydrophilicity and hydrodynamic volume increased. As carbon numbers of the chain extenders inreased, the final particle size increased significantly From the results it was concluded that the chain extension reaction took place among the particles not only in a particle.

논문정보
  • - 주제 : 공학분야 > 화학공학
  • - 발행기관 : 한국공업화학회
  • - 간행물 : 응용화학, 7권 1호
  • - 발행년도 : 2003
  • - 페이지 : pp.13-16 ( 총 4 페이지 )
  • - UCI(KEPA) : I410-ECN-0102-2009-570-003883279
저널정보
  • - 주제 : 공학분야 > 화학공학
  • - 성격 : 학술지
  • - 간기 : 반년간
  • - 국내 등재 : -
  • - 해외 등재 : -
  • - ISSN : 1226-8801
  • - 수록범위 : 1997–2013
  • - 수록 논문수 : 2399