화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.19, No.4, 351-363, April, 2011
DOI10.1007/s13233-011-0407-x  Export Citation
Characterization and Properties of Ethylene-Propylene Copolymers Synthesized with Homogeneous and Supported Metallocene Catalyst in the Whole Range of Compositions
Javier Arranz-Andres†, Inmaculada Suárez1, Rosario Benavente, and Ernesto Pérez
  • Instituto de Ciencia y Tecnología de Polímeros (CSIC), Juan de la Cierva 3, 28006, Madrid, Spain
  • 1Escuela Superior de Ciencias Experimentales y Tecnologia, Universidad Rey Juan Carlos, 28933, Móstoles-Madrid, Spain
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Two series of ethylene-propylene copolymers were synthesized in the whole composition range using a metallocene catalyst, one in the homogeneous phase (H copolymers), and the other with the catalyst supported in silica (S copolymers). Some differences were found between the two groups. Therefore, the amount of ethylene needed to obtain a certain proportion of the γ form is lower in the H than in S series. Moreover, the composition to obtain the pseudo hexagonal form is also different for the two groups. On the other hand, degree of crystallinity, crystal sizes and microhardness values display a similar variations with the comonomer content of the two series. Consequently, from a macroscopic point of view, materials with similar macroscopic mechanical properties can be produced using both supported and homogeneous metallocene catalysts despite the structural differences.
Keywords:copolymerization;metallocene catalysts;structure.
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