The influence of crystal structures of nucleating agents on the crystallization behaviors of isotactic polypropylene |
| |
| Authors: | Wei-Min Hou Gang Liu Jian-Jun Zhou Xia Gao Yan Li Lin Li Shi Zheng Zhong Xin Li-Qun Zhao |
| |
| Affiliation: | (1) State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100080, People’s Republic of China;(2) College of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, People’s Republic of China;(3) College of Chemical Engineering, Shenyang Institute of Chemical Technology, Liaoning, 110021, People’s Republic of China;(4) Graduate School, Chinese Academy of Sciences, Beijing, 100080, People’s Republic of China |
| |
| Abstract: | The crystals of N, N′-dicyclohexyl-2,6-naphthalenedicarboxamide (DC26NDCA) and N,N′-dicyclohexyl-1,4-naphthalenedicarboxamide (DC14NDCA) were selected as nucleating agents to induce the crystallization of isotactic polypropylene (i-PP). The influence of the crystal structures of the nucleating agents on the crystallization behaviors and morphologies was studied by means of differential scanning calorimeter, wide-angle X-ray diffraction, polarized light microscopy, and atomic force microscopy (AFM). The results show that DC26NDCA is a selective β-nucleating agent for the i-PP crystallization, while DC14NDCA only has a very weak α-nucleating effect for the i-PP crystallization. The dynamic growth processes reveal that i-PP crystals grow with different crystallization behaviors in the presence of the nucleating agents. The i-PP lamellar structures on the crystal surfaces of the nucleating agents were observed by AFM in details, which suggested that the nucleating agents induced the epitaxial growth of the i-PP lamellae. |
| |
| Keywords: | Isotactic polypropylene Nucleating agent Epitaxial growth Crystallization |
| 本文献已被 SpringerLink 等数据库收录！ |
|
