The Effect of Ionic Group and MMA Contents on the Physical Properties of PU/PMMA Hybrids

PU/PMMA Hybrids의 물성에 대한 이온성기와 MMA함량의 영향

  • Jeong, Chang Nam (Dept. of Polym. Eng., Suncheon Univ.) ;
  • Cho, Hang Kyu (Dept. of Chem. Eng., College of Eng. & Sci., Hanyang Univ.) ;
  • Noh, Si Tae (Dept. of Chem. Eng., College of Eng. & Sci., Hanyang Univ.)
  • 정창남 (순천대학교 공과대학 고분자공학과) ;
  • 조항규 (한양대학교 공학대학 화학공학과) ;
  • 노시태 (한양대학교 공학대학 화학공학과)
  • Received : 1996.10.23
  • Accepted : 1997.07.07
  • Published : 1997.08.10

Abstract

UDs were synthesized from two different polyols(PTMG, PBEAG), ionic chain extender(DMPA), EDA with $H_{12}-MDI$. PU/PMMA hybrids were prepared with free radical polymerization of MMA monomer in MMA-swelled PUD. PUD particle size and film properties were investigated ionic content and polyol type. Mechanical and thermal properties of PU/PMMA hybrid film were studied in terms of PU's ionic content and the venation of PU/PMMA compositions. As DMPA content increased from 2wt% to 10wt% in PUD, particle size of PUD decreased. PUD's particle size with ester type polyol was found to be smaller then ether type polyol used. Phase separation between hard segment(HS) and soft segment(SS) with ionic contents in PU was shown by the thermal, mechanical property measurement. Although the composition of MMA was changed from 0 to 40 wt% in PU/PMMA hybrid, the particle size of the hybrid did not increase. Using the ester type polyol, tensile strength of hybrid was found to increase by 2wt% - 6wt% DPMA content, but as higher content the strength of hybrid decreased. Moreover with the ether type polyol, tensile strength of hybrid was observed to increase by 2wt% - 4wt% DMPA content, while decreasing at higher content. PU and PMMA polymer molecule being mixed in molecular level was confirmed from the pattern of $T_g$ in DSC thermogram.

Keywords

Acknowledgement

Supported by : 순천대학교

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