PT  - JOURNAL ARTICLE
AU  - Jakubíček, Josef
AU  - Hřibová, Martina
AU  - Kučera, Jaroslav
AU  - Kubišová, Milena
TI  - The Influence of Nucleating Agents and Process Parameters on Phase Structure of Isotactic Polypropylene and its Copolymer with 3% Ethylene
DP  - 2016 Feb 1
TA  - Manufacturing Technology Journal
PG  - 103--106
VI  - 16
IP  - 1
AID - 10.21062/ujep/x.2016/a/1213-2489/MT/16/1/103
IS  - 12132489
AB  - The homopolymer of the isotactic polypropylene (iPP) and the random copolymer of the isotactic polypropylene and 3% ethylene (iPPE) were used in this study. Isotactic polypropylene can be prepared in α, β and γ morphological phases depending on its crystallization conditions. The phase β content has a strong influence on mechanical, optical and thermal properties. The samples with nucleating agents (NA) α and β were used. Various process parameters were used to prepare melted samples: two thicknesses and three different cooling regimes. Wide-angle X-ray scattering (WAXD) and scanning electron microscopy (SEM) were used to investigate the phase structure. The results show that iPP without nucleation agents (4mm,