A novel crystal morphology of isotactic polypropylene induced by pressure vibration field: alpha Banded spherulite

作者：Xia, Chao; Du, Hailan; Wang, Feifei; La, Renxi; Mi, Dashan; Li, Xinpeng; Zhang, Jie^*

来源：Materials Letters, 2015, 153: 66-69.

DOI：10.1016/j.matlet.2015.04.005

• iPP
• Banded-spherulite
• Crystal morphology
• Pressure vibration injection molding

This article reports the novel crystal morphology of isotactic polypropylene (iPP) called alpha banded spherulites, which were induced by a pressure vibration field and investigated through polarized light microscopy, scanning electron microscopy and atomic force microscopy. Results showed that the height profile of banded spherulite along the radius corresponded to the pressure fluctuation in the cavity. No rings were found in the exterior of the spherulites, indicating that pressure vibration with a specific intensity was indispensable for the formation of banded spherulites. This work provided a new insight into the formation mechanism of banded spherulites induced by a mechanical field.

• 出版日期2015-8-15
• 单位四川大学; 高分子材料工程国家重点实验室