Oxides of Cobalt

The effect of comonomer content and the distribution of side chain branching on thermal, viscoelastic, rheological, and mechanical properties was investigated using the ethylene 1-octene copolymer (EOC) blends, which consist of one component by the Ziegler-Natta and another by the metallcoens catalysis. Two model blend systems were selected; one was composed of FA+FM, which were made using the Ziepler-Natta and metallocene catalysis, respectively, and which has a similar melf index (MI), density, and comonomer content. The other blend was composed of SF+FM, which were also made using the Ziegler-Natta and metallocene catalysts, respectively, however, despite similar (MI) and density they had different comonomer contents. The big difference between the Zieler- Natta and metallocene EOC's is the comonomer distribution and the length of the side chain branching. Regardicess of the blending methods (solution and melt blending), the blends exhibited two distinct melting and drystallzation peaks, implying that the consituents excluded one another during crystallization. A single ？ relaxation shifted to a lower temperature relative to the content of metallocene EOC, thereby indicating miscitility in the amorphous region. In addition, the mechanical properties seemed to have no dependency on the comonomer content. Hence the properties of EOC blends consisting of components with a similar MI and density influenced by both the comonomer contents and the distribution of the side chain branching.