Crystallization under shear in isotactic polypropylene containing nucleators

被引：98
作者：
Byelov, Dmytro [1 ,2 ,3 ]
Panine, Pierre [4 ]
Remerie, Klaas [5 ]
Biemond, Edwin [5 ]
Alfonso, Giovanni C. [6 ]
de Jeu, Wim H. [1 ,2 ,3 ]
机构：
[1] Dutch Polymer Inst, NL-5600 AX Eindhoven, Netherlands
[2] Eindhoven Univ Technol, Dept Chem Engn & Chem, NL-5600 MB Eindhoven, Netherlands
[3] FOM, Inst Atom & Mol Phys AMOLF, NL-1098 SJ Amsterdam, Netherlands
[4] European Synchrotron Radiat Facil, F-38043 Grenoble, France
[5] SABIC Europe, NL-6160 AH Geleen, Netherlands
[6] Univ Genoa, Dept Chem & Ind Chem, I-16146 Genoa, Italy
来源：
POLYMER | 2008年 / 49卷 / 13-14期
关键词：
polypropylene crystallization; nucleating agents; shear;
D O I：
10.1016/j.polymer.2008.04.051
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
We report results from time-resolved small/wide angle X-ray scattering of well-characterized isotactic polypropylene (iPP), in its pure form as well as loaded with nucleating additives of different shapes (isotropic, elongated, platelet-like). Isothermal crystallization of these systems has been studied both under quiescent conditions and after application of a shear pulse. A quantitative analysis is presented that couples the applied shear field and the specific additive to the nucleation of iPP and the subsequent kinetics of crystallization. The effect of flow is only relevant if its contribution to the nucleation density is at least of the same order of magnitude as the nucleation density under quiescent conditions. Anisotropic additives show strong interactions with the flow field leading to extra nucleating sites. (c) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3076 / 3083
页数：8
相关论文
共 24 条
  • [1] ALFONSO GC, 2003, P M POL CRYST STRUCT
  • [2] [Anonymous], PROCESSING POLYM
  • [3] Kinetics of phase change I - General theory
    Avrami, M
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1939, 7 (12) : 1103 - 1112
  • [4] Isothermal crystallization behavior of isotactic polypropylene blended with small loading of polyhedral oligomeric silsesquioxane
    Chen, Jean-Hong
    Yao, Bo-Xian
    Su, Wen-Bin
    Yang, Yao-Bin
    [J]. POLYMER, 2007, 48 (06) : 1756 - 1769
  • [5] De Boor C., 1978, PRACTICAL GUIDE SPLI, DOI DOI 10.1007/978-1-4612-6333-3
  • [6] Influence of shear on the templated crystallization of poly(butylene terephthalate)/single wall carbon nanotube nanocomposites
    Garcia-Gutierrez, M. C.
    Hernandez, J. J.
    Nogales, A.
    Pantine, P.
    Rueda, D. R.
    Ezquerra, T. A.
    [J]. MACROMOLECULES, 2008, 41 (03) : 844 - 851
  • [7] Green R. O., COMMUNICATION
  • [8] HANSSEN R, COMMUNICATION
  • [9] Haudin JM, 2002, MACROMOL SYMP, V185, P119, DOI 10.1002/1521-3900(200208)185:1<119::AID-MASY119>3.0.CO
  • [10] 2-K
123