Morphology and Properties of PP/PU Blends Prepared by Compositional Quenching

Compositional Quenching으로 제조한 PP/PU 블렌드의 모폴로지 및 물성

  • Lim, Gyeong-Taek (Faculty of Applied Chemistry, Chonnam National University) ;
  • Ju, Min-Hyuk (Faculty of Applied Chemistry, Chonnam National University) ;
  • Kim, Do-Heyoung (Faculty of Applied Chemistry, Chonnam National University) ;
  • Song, Ki-Chan (Faculty of Applied Chemistry, Chonnam National University) ;
  • Kim, Su-Kyung (Faculty of Applied Chemistry, Chonnam National University)
  • Published : 2001.09.30

Abstract

Polypropylene(PP)/polyurethane(PU) blends with reactive compatibilizers were prepared by the compositional quenching process. Maleic anhydride grafted PP(MPP) and hydroxyethyl maleimide grafted PP(HPP) were introduced as reactive compatibilizers. The formation of HPP and the reactions of compatibilizers with the PU components were confirmed by FT-IR spectroscopy. The morphology, tensile properties, thermal stability, and surface property were studied. The blends prepared by the compositional quenching showed better dispersed domain morphology than the melt blends. The PU domain size became more uniform and reduced in size with increasing the amount of compatibilizers. The blends with HPP showed sightly smaller domain sire than the blends with MPP. The blends with compatibilizers all showed improved tensile properties, surface property. and thermal stability due to the interfacial adhesion effect. The blends with MPP showed higher surface energy than the blends with HPP, but the latter showed better thermal stability compared to the former.