TY - JOUR
T1 - Crystallization behavior and melting characteristics of PP nucleated by a novel supported β-nucleating agent
AU - Zhang, Z.
AU - Wang, C.
AU - Yang, Z.
AU - Chen, C.
AU - Mai, K.
PY - 2008/10/30
Y1 - 2008/10/30
N2 - The β-nucleated PP with high β-PP content was prepared by a novel supported β-nucleating agent, which was prepared with pimelic acid supported on nano-CaCO3 as support. The influences of the content of the support and supported β-nucleating agent, pre-melting temperature (Tmelt) and scan rates on crystallization behavior and melting characteristics, and the β-PP content of β-nucleated PP were determined by Differential Scanning Calorimeter (DSC) and Wide-Angle X-ray Diffraction (WAXD). The results indicated that the addition of supported β-nucleating agent markedly increased the crystallization temperature (Tc) of PP. Increasing the content of supported β-nucleating agent slightly increased the Tc, but had no influence on the melting temperatures (Tm) of β-nucleated PP. The Tc and Tm of β-nucleated PP decreased slightly with increasing the content of the support nano-CaCO3. The effects of scan rates and multiple scans with different Tmelt on the crystallization and melting behavior of PP nucleated by supported β-nucleating agent are similar to that of PP nucleated by calcium pimelate (CaHA). The β-PP content above 90 percent was obtained in PP nucleated by supported β-nucleating agent and was not influenced by the content of nano-CaCO3. The supported β-nucleating agent prepared by supporting pimelic acid on nano-CaCO3 is a β-nucleating agent with high efficiency and selectivity, and low cost. © 2008 Elsevier Ltd. All rights reserved.
AB - The β-nucleated PP with high β-PP content was prepared by a novel supported β-nucleating agent, which was prepared with pimelic acid supported on nano-CaCO3 as support. The influences of the content of the support and supported β-nucleating agent, pre-melting temperature (Tmelt) and scan rates on crystallization behavior and melting characteristics, and the β-PP content of β-nucleated PP were determined by Differential Scanning Calorimeter (DSC) and Wide-Angle X-ray Diffraction (WAXD). The results indicated that the addition of supported β-nucleating agent markedly increased the crystallization temperature (Tc) of PP. Increasing the content of supported β-nucleating agent slightly increased the Tc, but had no influence on the melting temperatures (Tm) of β-nucleated PP. The Tc and Tm of β-nucleated PP decreased slightly with increasing the content of the support nano-CaCO3. The effects of scan rates and multiple scans with different Tmelt on the crystallization and melting behavior of PP nucleated by supported β-nucleating agent are similar to that of PP nucleated by calcium pimelate (CaHA). The β-PP content above 90 percent was obtained in PP nucleated by supported β-nucleating agent and was not influenced by the content of nano-CaCO3. The supported β-nucleating agent prepared by supporting pimelic acid on nano-CaCO3 is a β-nucleating agent with high efficiency and selectivity, and low cost. © 2008 Elsevier Ltd. All rights reserved.
KW - β-Nucleating agent
KW - β-Polypropylene
KW - Nano-CaCO3
UR - http://www.scopus.com/inward/record.url?scp=54449083744&partnerID=8YFLogxK
UR - http://dx.doi.org/10.1016/j.polymer.2008.09.009
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-54449083744&partnerID=40&md5=95751cc0354159d606a860163806b485
U2 - 10.1016/j.polymer.2008.09.009
DO - 10.1016/j.polymer.2008.09.009
M3 - Article
SN - 0032-3861
VL - 49
SP - 5137
EP - 5145
JO - Polymer
JF - Polymer
IS - 23
ER -