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- Title
Non‐isothermal crystallization kinetic behavior of graphene reinforced poly(ether ether ketone) nanocomposites.
- Authors
Yu, Fei; Xiao, Linghan; Li, Ming; Liu, Yu; Shang, Lei; Ao, Yuhui
- Abstract
The research on non‐isothermal crystallization kinetics of Poly (ether ether ketone) (PEEK) nanocomposites with addition of graphene was executed by differential scanning calorimetry (DSC). All samples were cooled from 390°C to 30°C with different cooling rates (from 5 to 25°C/min). The modified Avrami, Ozawa and combined Avrami‐Ozawa methods were served for fitting the data, in order to research the non‐isothermal crystallization kinetics of PEEK composites contained different amount of graphene. It was found that the absolute crystallinity of graphene/PEEK composites decreased with the graphene content increasing, indicating the restricted effect of the graphene on the mobility of PEEK molecular chains. Thus it imparted the resulting nanocomposites to form the smaller and more defective spherulites, by comparision with the pristine PEEK which formed by the homogeneous crystallization. Moreover, The Avrami‐Ozawa equation was proved to be the reasonable model to depict the crystallization behavior of the graphene/PEEK nanocomposites under non‐isothermal condition. To research the effect of graphene on the PEEK crystallization process, the nonisothermal crystallization behavior for nanocomposites with different contents of graphene is investigated in this paper. The crystallinity decreases with the gradual addition of graphene to the PEEK matrix compared to pristine PEEK. Therefore, during the nonisothermal crystallization process of the PEEK/GE composites, the restriction effects of graphene on the mobility of polymer segments seems to be more dominant.
- Subjects
POLYETHER ether ketone; CRYSTALLIZATION kinetics; NANOCOMPOSITE materials; SPHERULITES (Polymers); DIFFERENTIAL scanning calorimetry; AVRAMI equation; CRYSTALLINITY
- Publication
Polymer Crystallization, 2019, Vol 2, Issue 1, pN.PAG
- ISSN
2573-7619
- Publication type
Article
- DOI
10.1002/pcr2.10032