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이피디엠/폴리프로필렌 열가소성 경화물에서 오일의 블렌드 방식이 경화물의 물성에 미치는 영향
나성수 ( Sung Su Na ),송기찬 ( Ki Chan Song ),김수경 ( Su Kyung Kim ) 한국고무학회 2009 엘라스토머 및 콤포지트 Vol.44 No.3
이피디엠/폴리프로필렌 열가소성 경화물을 오일의 배합 순서를 달리한 두 가지 방식(오일 블렌드 후 가교방식과 가교 후 오일 블렌드 방식)으로 제조하여 가교도(겔분율), 경도, 인장강도, 신율, 용융흐름지수 등을 조사, 오일의 블렌드 방식이 열가소성 경화물의 물성에 미치는 영향을 알아보았다. 오일의 블렌드 방식에 따른 두 경화물의 가교도와 기계적 물성의 차는 크지 않았으나, 가공성에 있어서는 가교 후 오일 블렌드 방식으로 제조한 경화물의 용융흐름지수가 현저히 증가한 결과를 보였다. Influence of blend mode of extender oil on the properties of thermoplastic vulcanizates (TPVs), based on an ethylene-propylene-diene copolymer (EPDM) and a polypropylene (PP), was studied. The EPDM/PP TPVs were prepared in an open roll mill using two different modes in blending sequence of paraffinic oil and phenolic curative, i.e., Oil-Cure and Cure-Oil modes. Degree of cross-linking by gel fraction and properties such as hardness, tensile strength, elongation at break, and melt flow rate were investigated as a function of extender oil content for the two modes. Little influence of the blend mode of extender oil on the degree of cross-linking and mechanical behaviors was observed. However, the use of Cure-Oil mode in the preparation of EPDM/PP TPVs resulted in a marked increase in the level of processability as reflected by melt flow index, as compared to the use of Oil-Cure mode.
Compositional Quenching 으로 제조한 PP / PU 블렌드의 모플로지 및 물성
임경택(Gyeong Taek Lim),주민혁(Min Hyuk Ju),김도형(Do Heyoung Kim),송기찬(Ki Chan Song),김수경(Su Kyung Kim) 한국고무학회 2001 엘라스토머 및 콤포지트 Vol.36 No.3
N/A Polypropylene(PP)/Polyurethane(PU) blends with reactive compatibilizers were prepared by the compositional quenching process. Malefic 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 slightly smaller domain size 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.