Polymorphism of polypropylene in PP/PA-6 blends
[ 1 ] Instytut Technologii i Inżynierii Chemicznej, Wydział Technologii Chemicznej, Politechnika Poznańska | [ P ] pracownik
2005
Rocznik: 2005 | Tom: vol. 13 | Numer: no. 5 (53)
artykuł naukowy
angielski
- polypropylene
- polyamide-6
- polymorphism
- crystallisation kinetic
- WAXS
EN In this paper, the structure and kinetic parameters of isotactic polypropylene in PP/PA-6 blends have been studied as a function of the component content as well as of the presence of compatibilising agent. For this purpose, the styrene-ethylene-butylene-styrene (SEBS) copolymer modified by succinic anhydride was used. Blends containing 10%, 20% and 30% of PA-6 were prepared by extrusion and formed by injection procedures. The samples obtained by the WAXS and DSC methods were analysed. X-ray diffraction analysis showed that in the cases of the 10% or 20% polyamide component in blends, the formation of the beta phase of PP to the amount of 30% was registered. However, the increase in content of PA-6 up to 30% contributed to the decrease of the â-PP phase to 15%. The presence in blends of SEBS agent significantly reduces the induction ability of the beta form of PP for each amount of polyamide. Increasing the content of PA6 to 30% leads to the crystallisation temperature of iPP diminishing, and the half-time of crystallisation lengthening in comparison to materials containing 10% and 20% of PA-6. When the PP/PA-6 system contained SEBS, then an increase in the half-time of crystallisation and a decrease in crystallisation temperature was noted.
57 - 59
witryna wydawcy
ostateczna wersja opublikowana
0,397