SBRおよびNBRとアタクチックポリプロピレンとの混合について

概要

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We studied the various problems on the blends of atactic Polypropylene with SBR (Krylene NS and Philprene X-40) and NBR (Hycar 1042). Their blending ratios were 100/0, 95/5, 90/10, 85/15, 80/20, 75/25.The blends were made on the roll mill. First, in the blended polymers the dispersion was observed with a phase contrast microscope, on the other hand, in the compounded rubber and vuicanized rubber, Mooney viscosity, mill shrinkage, extrusion properties, physical properties and swelling in toluene were measured. From the results, it was found that : (1) It was found to be microheterogeneous dispersion from photographs taken by a phase contrast microscope, and the phase separation in solution was obserbed. (2) Mooney viscosity and mill shrinkage decreased straightly. (3) In the case of Krylene NS and Hycar 1042, extrusion properties and sheet surface were markedly improved in blending ratio about 85/15. (4) In the physical properties of vulcanizate, linear relationships were found.
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