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Preparation and characterization of polypropylene and waste tire powder modified by allylamine blends
Author(s) -
Lee Sung Hyo,
Shanmugharaj A. M.,
Sridhar V.,
Zhang Zhen Xiu,
Kim Jin Kuk
Publication year - 2009
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1307
Subject(s) - materials science , polypropylene , natural rubber , differential scanning calorimetry , ultimate tensile strength , composite material , thermoplastic , allylamine , izod impact strength test , crystallinity , dispersion (optics) , maleic anhydride , thermoplastic elastomer , copolymer , polymer , polyelectrolyte , physics , optics , thermodynamics
Waste tire powder subjected to allylamine modification in the presence of ultraviolet (UV) radiation has been used to prepare polypropylene based thermoplastic vulcanizates with maleic anhydride polypropylene (MA‐PP) as compatibilizer. The effect of increasing the concentration of MA‐PP on performance characteristics like tensile strength, elongation and rheological properties have been investigated. X‐ray diffraction studies of the PP/waste tire powder blend indicate the disappearance of β crystalline peaks on addition of waste tire powder in the PP, whereas it is observed in the allylamine modified rubber powder loaded PP. Differential scanning calorimetry results further supported the above fact. The improvement in mechanical properties of the PP/allylamine modified rubber powder loaded thermoplastic vulcanizates has been explained in terms of βα transformation of PP crystals during straining of the samples and uniform dispersion of allylamine coated rubber powder in the PP matrix. The melt rheological properties of the thermoplastic vulcanizates loaded with modified rubber powder are higher than its counterpart due to the higher dispersion as a result of chemical interaction between the rubber powder surface with the MA‐PP. Copyright © 2008 John Wiley & Sons, Ltd.