The Crystallization Behavior of β-iPP Film With Different Ordered Melt Structures
[1]Liu Zhongzhu,Qin Qi,Li Suishui,et al.The Crystallization Behavior of β-iPP Film With Different Ordered Melt Structures[J].Journal of Zhengzhou University (Engineering Science),2019,40(03):63-67.[doi:10.13705/j.issn.1671-6833.2018.03.010]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
40卷
Number of periods:
2019 03
Page number:
63-67
Column:
Public date:
2019-04-30
- Title:
- The Crystallization Behavior of β-iPP Film With Different Ordered Melt Structures
- Keywords:
- Melt extrusion-drawing; Isotactic polypropylene; beta nucleating agent; Ordered melt structure; crystallization behavior
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2018.03.010
- Abstract:
- The rare earth β-nucleating agent modified isotactic polypropylene (iPP) films were prepared by melt extrusion-stretching method. Subsequently, the films were heated to different fusion temperatures. The influence of ordered melt structures on non-isothermal and isothermal crystallization behavior of β-iPP films were investigated by DSC and POM experiments. The results indicated that, during the non-isothermal crystallization process, the partially melted β-iPP can induce the formation of more nucleation sites with decreasing crystallization temperature, and then inducing the crystallization at higher temperature; Meanwhile, the dense cylindrite is formed in samples. During the isothermal crystallization process, when the Tf is below 169 °C, the β crystal is transformed into α crystal in the sample; however, when the Tf is above 169 °C, the α crystal in the sample gradually changes into the β crystal.
- References:
- -
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Last Update:
2019-04-16