Journal
POLYMER BULLETIN
Volume 76, Issue 12, Pages 6413-6428Publisher
SPRINGER
DOI: 10.1007/s00289-019-02724-z
Keywords
Silane-crosslinked blends; Mechanical property; Solvent resistance; Rheology
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Funding
- Outstanding Young Talent Research Fund of Zhengzhou University [1521320024]
- National Natural Science Foundation of China [51373157]
- Open Fund of Key Laboratory of Materials Preparation and Protection for Harsh Environment (Nanjing University of Aeronautics and Astronautics)
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The effect of silane crosslinking reaction on properties and structure of polypropylene (PP)/ethylene-octene elastomer (POE) blends had been carried out. FTIR and gel content tests confirmed the grafting and crosslinking reaction mechanism of PP/POE blends. The incorporation of POE phase enhanced the crosslinking degree and thermal stability of blends. Crystallinity of silane-crosslinked PP/POE blends decreased sharply, and the melting points change a little with the POE content increasing. The rheological curves of silane-crosslinked PP/POE blends showed an obvious gel point, corresponding to the dynamic crosslinking network. Solvent resistance tests suggested crosslinking had a great improvement of solvent resistance. The blends with 30% POE had good comprehensive mechanical properties. Scanning electron microscopy images exhibited that crosslinking had a great influence on the morphologies of silane-crosslinked PP/POE blends. Characterization results indicated the gel point acquired from rheology had some corresponding relationship with mechanical properties and solvent resistance.
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