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Polypropylene/polypropylene‐grafted acrylic acid copolymer/ethylene–Acrylic acid copolymer ternary blends for hydrophilic polypropylene
Author(s) -
Zhang Jun,
Yao Yu,
Wang XiaoLin,
Xu JianHai
Publication year - 2006
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.23252
Subject(s) - polypropylene , differential scanning calorimetry , thermogravimetric analysis , materials science , copolymer , acrylic acid , polymer blend , polymer chemistry , contact angle , ternary operation , thermal stability , scanning electron microscope , thermogravimetry , chemical engineering , composite material , polymer , physics , computer science , engineering , thermodynamics , programming language
Ternary blends of polypropylene (PP), a polypropylene‐grafted acrylic acid copolymer (PP‐ g ‐AA), and an ethylene–acrylic acid copolymer (EAA) were prepared by melt blending. The surfaces of films with different contents of these three components were characterized with contact‐angle measurements. Scanning electron microscopy, Fourier transform infrared spectroscopy, differential scanning calorimetry, and thermogravimetric analysis were used to characterize the microstructure, melting and crystalline behavior, and thermal stability of the blends. The contact angles of the PP/PP‐ g ‐AA blends decreased monotonically with increasing PP‐ g ‐AA content. With the incorporation of EAA, the contact angles of the PP/PP‐ g ‐AA/EAA ternary blends decreased with increasing EAA content. When the concentration of EAA was higher than 15 wt %, the contact angles of the ternary blends began to increase. Scanning electron microscopy observations confirmed that PP‐ g ‐AA acted as a compatibilizer and improved the compatibility between PP and EAA in the ternary blends. Differential scanning calorimetry analysis suggested that acrylic acid moieties could act as nucleating agents for PP in the polymer blends. Thermogravimetric analysis and differential thermogravimetry confirmed the optimal blend ratio for the PP/PP‐ g ‐AA/EAA ternary blends was 70/15/15. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 436–442, 2006