Publication: Improving performance of polypropylene through combined use of calcuim carbonate and metallocene-produced impact modifier
21
Issued Date
2001-06-01
Resource Type
ISSN
03602559
Other identifier(s)
2-s2.0-0035370693
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Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Polymer-Plastics Technology and Engineering. Vol.40, No.3 (2001), 235-247
Suggested Citation
K. Premphet, P. Horanont Improving performance of polypropylene through combined use of calcuim carbonate and metallocene-produced impact modifier. Polymer-Plastics Technology and Engineering. Vol.40, No.3 (2001), 235-247. doi:10.1081/PPT-100000245 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/26602
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Title
Improving performance of polypropylene through combined use of calcuim carbonate and metallocene-produced impact modifier
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Abstract
Polypropylene (PP) composites containing calcium carbonate (CaCO3) filler and/or impact modifiers were prepared and investigated as a function of composition. The effects of surface treatment of filler particles and type of impact modifiers were studied. Characterization of composite microstructure was discussed in relation to the mechanical properties. The results show that the balance of mechanical properties of PP, as presented by the modulus and impact strength, can be achieved through combined use of low-cost CaCO3filler and impact modifiers. The use of stearic-acid-coated filler and metallocene-produced ethylene-octene copolymer (EOR) impact modifier was found to give the best balance. The composite containing 20% of coated CaCO3and 20% of EOR exhibited comparable modulus and, remarkably, 20 times higher impact strength than the unfilled PP. Cavitation around the filler particles in accordance with plastic yielding are important mechanisms for energy dissipation in that composite.