Abstract
A study was made of the possibility of homogenization of PE-PP and PP-ethylene propylene rubber mixtures under shear deformation and high pressure. Films of these heterogeneous mixtures were placed on Bridgman anvils and subjected to shear deformation at a pressure of 0·1–20 kbar and a temperature of 20°C. The structure of initial and deformed films was examined by radiothermoluminescence. The initial films had two glass temperatures, which agree with T g of the components of the mixture. It was shown that deformation at pressures higher than 1 kbar modifies the phase condition of mixtures. With angles of rotation of the anvil of 100–200° glass temperatures converge; films deformed using angles of rotation of 1000–2000° are characterized by the existence of a single glass temperature which is between glass temperatures of mixture components and are therefore homogeneous in the amorphous sections. A study was made of the stability of deformed films under conditions of heating. It was established that films deformed at p<10 kbar return to the heterogeneous state after heating to 220°; films deformed at p = 10–20 kbar are more stable and remain single phase after heating.
Published Version
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