Effects of ultrasound on the conformational and crystallization behavior of isotactic polypropylene polymerized with different Ziegler—Natta catalyst
作者: Shaohua ChenYuansen LiuTao ZengNannan DuanZhi WangLuoxin WangHua WangChangan XuJian Kang
作者单位: 1Wuhan Textile University
2State Oceanic Administration
3Sichuan Textile Research Institute
4Polymer Research Institute of Sichuan University
刊名: Polymer Science Series A, 2015, Vol.57 (5), pp.565-572
来源数据库: Springer Nature Journal
DOI: 10.1134/S0965545X15050053
英文摘要: Abstract(#br)Using different Ziegler—Natta catalysts, we have prepared two samples of isotactic polypropylene with similar molecular weight and average isotacticity, but different stereo-defect distributions. The influence of ultrasonic irradiation on the conformation and crystallization behavior of those samples were investigated by differential scanning calorimetry, wide-angle X-ray diffraction and Fourier transform infrared spectroscopy. The ultrasonic treatment induced a decrease in the degree of crystalline perfection and a wider distribution range of the crystalline perfection of polypropylene. Meanwhile, the crystal particles pack looser and the crystallite size decreased under the influence of ultrasonic irradiation. On the conformation aspect, the molecular movement in...
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影响因子:0.669 (2012)

  • isotactic 全同
  • Natta catalyst 纳塔催化剂
  • polypropylene 聚丙烯
  • Ziegler 捷格罗白葡萄酒
  • polymerized 聚合的
  • ultrasound 超声
  • behavior 行为
  • different 不相同的
  • conformational 构造的