Premium
Compatibility of isotactic polypropylene/poly(ε‐caprolactone) blends
Author(s) -
Kalfoglou Nikos K.
Publication year - 1985
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1985.070300516
Subject(s) - tacticity , miscibility , materials science , crystallinity , melting point depression , polypropylene , crystallite , amorphous solid , polymer blend , caprolactone , composite material , melting point , polymer , dynamic mechanical analysis , polymer chemistry , copolymer , polymerization , crystallography , chemistry , metallurgy
Blends of poly(ε‐caprolactone) (PCL)/isotactic polypropylene (iPP), in the solid state and at compositions spanning the complete range, were characterized using the dynamic mechanical, DSC, and optical microscopy techniques. Morphology examination revealed that increasing the PCL content causes a decrease of spherulitic size. The loss modulus spectra at isochronous conditions (110 Hz) reveal an heterophase system with limited phase mixing between the amorphous components of the blend constituents. Melt‐mixing and quenching using the DSC causes a considerable melting point depression of the PCL component, attributed to its miscibility with the polypropylene amorphous phase. Addition of PCL caused an increase of iPP crystallinity at intermediate compositions, while at low PCL levels the presence of iPP crystals hinders the growth of PCL crystallites.