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Melting and crystallization behaviors, morphology, and mechanical properties of β‐polypropylene/polypropylene‐ graft ‐maleic anhydride/calcium sulfate whisker composites
Author(s) -
Dou Qiang,
Duan Jiawei
Publication year - 2016
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.23391
Subject(s) - materials science , composite material , whisker , polypropylene , maleic anhydride , crystallization , scanning electron microscope , differential scanning calorimetry , ultimate tensile strength , flexural modulus , flexural strength , polymer , chemical engineering , copolymer , physics , engineering , thermodynamics
The melting and crystallization behaviors, morphology, and mechanical properties of polypropylene (PP)/surface‐treated calcium sulfate (CaSO 4 ) whisker (T‐CSW), β‐PP/T‐CSW, and β‐PP/polypropylene‐ graft ‐maleic anhydride (PP‐g‐MAH)/T‐CSW composites had been investigated via differential scanning calorimetry (DSC), wide angle X‐ray diffraction (WAXD), polarized light microscopy (PLM), scanning electron microscopy (SEM), and mechanical tests. We found that T‐CSW was an α‐nucleating agent and increased the crystallization temperatures of PP, but PP‐g‐MAH and high loadings of T‐CSW had weakly negative effects on the crystallization rates of PP. The T‐CSW restrained the formation of β‐spherulites, and the spherulitic size decreased in the composites. PP‐g‐MAH improved the compatibility and adhesion between T‐CSW and the matrix. The notched impact strength was improved, and the tensile strength was enhanced at low levels of T‐CSW, while the flexural modulus was weakened for β‐PP/T‐CSW and β‐PP/PP‐g‐MAH/T‐CSW composites versus PP/T‐CSW composites. POLYM. COMPOS., 37:2121–2132, 2016. © 2015 Society of Plastics Engineers