Phase separation in polymers is important for many technical applications but is difficult to predict theoretically. Recently, extensive experimental studies on the miscibility of polyolefins revealed that these systems display a wider variety of mixing behavior than their chemical similarity suggests. In order to predict phase diagrams of polyolefin blends from pure component properties, we ha...

Materials that are used in everyday life have an immense impact on the development of the human society. During the Stone Age and Iron Age epochs, humans widely used stone or iron to make tools. In the present age, there is no question that polymers and plastics dominate our rapidly developing daily needs and show enormous potential for the development of new technologies. Constructive material...

Raman spectroscopy is a vibrational spectroscopic technique that widely used for analyses of the chemical structures and morphologies polymeric materials. The peak position area each band are influenced by microscopic deformations molecular chain e.g. load-sharing, orientation, conformational state. In particular, analysis has been to investigate structure–mechanical properties relationship sem...

According to the European circular economy strategy, all plastic packaging placed on market by 2030 has be recyclable. However, for recycled plastics in direct contact with food, there are still major safety concerns because (non-)intentionally added substances can potentially migrate from polymers into foodstuffs. Therefore, Food Safety Authority (EFSA) derived very low migration limits (e.g.,...

Polygermanes are germanium-based analogues of polyolefins and possess polymer backbones made up catenated Ge atoms. In the present contribution we report preparation a germanium polyethylene analogue, polydihydrogermane (GeH2)n, via two straightforward approaches that involve topotactic deintercalation Ca ions from CaGe Zintl phase. The resulting (GeH2)n possesses morphologically dependent chem...

beside ziegler-natta and phillips catalysts the development of methylaluminoxane (mao) as cocatalyst incombination with metallocenes or other transition metal complexes for the polymerization of olefins haswidely increased the possibilities in controlling the polymer composition, polymer structure, tacticity and special properties with high precision. these catalysts allow the synthesis of isot...

In a previous paper we have shown how small-angle neutron and x-ray scattering (SANS, SAXS) can be used to determine the melt compatibility of different polyolefins, including high-density (HD), low-density (LD), and linear low density (LLD) polyethylene. Such blends have attained widespread commercial applications, though the understanding of the mechanical and melt-flow properties of such ble...