Citation: Ding-ding Hu, Shi-bing Ye, Fei Yu, Jia-chun Feng. Further Understanding on the Three Domains of Isotactic Polypropylene by Investigating the Crystalline Morphologies Evolution after Treatment at Different Domains[J]. Chinese Journal of Polymer Science, ;2016, 34(3): 344-358. doi: 10.1007/s10118-016-1745-0 shu

Further Understanding on the Three Domains of Isotactic Polypropylene by Investigating the Crystalline Morphologies Evolution after Treatment at Different Domains

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State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China

Corresponding author: Jia-chun Feng,
Received Date: 12 September 2015
Revised Date: 7 October 2015

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 21174032 and 21574029) and China National Petroleum Corporation. We also greatly thank for the beam time provided by beamline BL16B1 of Shanghai Synchrotron Radiation Facility (Z14sr0051).

The introduction of concept of the three domains of isotactic polypropylene (iPP) by Wittmann and Lotz et al. is an important advance in understanding the influence of the melt structures on the crystallization behaviors and consequent properties. To further understand the physical nature of the melt structures, the crystalline structures of iPP after thermal treatment in the three domains are systematically investigated. It is found that after treated at different domains the crystal morphologies, including the sizes and birefringence of spherulitic, the proportion of radial and tangential lamellae, etc., have distinctly different features. Our study reveals that the nuclei at domain II compose of locally ordered chains and the induced memory effect could not be erased under annealing treatment, while the nuclei at domain III compose of crystal fragments, which will aggregate under annealing process. Based on our results, highly schematic diagrams are proposed to illustrate the probable physical characteristics of the melt structures at the three different domains.
- Polypropylene,
- Self-nucleating,
- Annealing,
- Crystallization morphology
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沈阳化工大学材料科学与工程学院沈阳 110142