Synthesis and Physical Properties of Waterborne Polyurethane Microgels

수분산성 폴리우레탄 마이크로겔의 합성과 물성

  • Kim, Kong-Soo (Dept. of Chemical Engineering, Chungbuk National University) ;
  • Kim, Tae-Kyung (Dept. of Chemical Engineering, Chungbuk National University) ;
  • Oh, Geul-Jung (Dept. of Chemical Engineering, Chungbuk National University) ;
  • Kim, Sang-Ki (Dept. of Chemical Engineering, Chungbuk National University)
  • 김공수 (충북대학교 화학공학부) ;
  • 김태경 (충북대학교 화학공학부) ;
  • 오중걸 (충북대학교 화학공학부) ;
  • 김상기 (충북대학교 화학공학부)
  • Published : 2000.12.31

Abstract

Waterborne polyurethane(PU) microgel dispersions were synthesized with different mole ratio of polytetramethylene glycol(PTMG) to dimethylol propionic acid(DMPA). Particle size distribution, thermal and mechanical properties of the PU microgels were investigated. Particle size of the microgels was distributed in the range of $98{\sim}$680{\mu}m$ and decreased with increasing the mole ratio of DMPA and 1,2,6-hexanetriol. Glass transition temperature and melting temperature of the microgels were in the range of $-79.7 {\sim}-78.1^{\circ}C$, $22{\sim}24^{\circ}C$ respectively. Tensile strength and elongation of the PU microgel films were maximum in the case of 60/40 mole ratio of PTMG/DMPA.