Probing into double crystallisation behaviour of polypropylene/CaCO3 composites
Li, L. -Z.1,2; Zhang, X. -Q.1; Su, Y. -L.1; Li, R. -B.1,2; Zhu, H. -J.1,2; Zhou, Y.1; Zhao, Y.1; Wang, D. -J.1
AbstractA series of isotactic polypropylene (iPP)/calcium carbonate (CaCO3) composites are prepared by melt blending, and the crystallisation behaviours of these composites are investigated by differential scanning calorimetry (DSC). The results show that the crystallisation exotherms displayed double peaks as the concentration of CaCO3 reaches a critical value of typically similar to 8 wt-% for nano-CaCO3 and similar to 20 wt-% for micron-CaCO3. With increasing content of CaCO3, the intensity of the higher temperature crystallisation peak increases, while that of the lower one decreases. Modifying the surface of CaCO3 with stearic acid leads to the increase in the critical concentration to trigger double crystallisation peaks, which is 50 wt-% for nano-CaCO3 filled iPP. The results of isothermal crystallisation, transmission electron microscopy (TEM) and polarised light optical microscope (POM) experiments indicate that the different nucleating abilities of CaCO3 composites are mainly responsible for the occurrence of the double crystallisation peaks in the composites.
KeywordPolypropylene Composite Caco3 Nucleating Ability Stearic Acid Crystallisation
Indexed BySCI
WOS IDWOS:000284689500008
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorWang, D. -J.
Affiliation1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, CAS Key Lab Engn Plast, Inst Chem, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, L. -Z.,Zhang, X. -Q.,Su, Y. -L.,et al. Probing into double crystallisation behaviour of polypropylene/CaCO3 composites[J]. PLASTICS RUBBER AND COMPOSITES,2010,39(9):425-429.
APA Li, L. -Z..,Zhang, X. -Q..,Su, Y. -L..,Li, R. -B..,Zhu, H. -J..,...&Wang, D. -J..(2010).Probing into double crystallisation behaviour of polypropylene/CaCO3 composites.PLASTICS RUBBER AND COMPOSITES,39(9),425-429.
MLA Li, L. -Z.,et al."Probing into double crystallisation behaviour of polypropylene/CaCO3 composites".PLASTICS RUBBER AND COMPOSITES 39.9(2010):425-429.
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