The structure of semicrystalic polypropylene was modified using nuclea
ting agent with the purpose to achieve better transparentness. The met
hod of small angle scattering of laser was used for evaluation of morf
ological structure of polymer. Film of polypropylene with marked spher
olits had a high opacity, without spherolits was transparent. This pro
cedure may be used for influencing by additives with clearificative ef
fect.