FIELD: chemistry.
SUBSTANCE: invention relates to polypropylene, a method for production thereof and a film capacitor made from said polypropylene. The polypropylene has a melting temperature (Tm) measured according to ISO 11357-3 of at least 151.0°C and xylene cold soluble fraction (XCS) of not more than 1.5 wt %. According to stepwise isothermal segregation technique (SIST) results, 45.0 to 67.0 wt % of the crystalline fraction has a lamella thickness in the range of 7.70 to 14.09 nm and 18.0 to 50.0 wt % of the crystalline fraction has a lamella thickness greater than 14.09 nm.
EFFECT: disclosed polypropylene has high heat resistance and enables to obtain biaxially oriented polypropylene (BOPP) and/or a film capacitor with high electrical breakdown strength and a high β parameter.
13 cl, 1 dwg, 9 tbl
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