Decomposition properties of PVA/graphene composites during melting-crystallization

Li, Chengpeng, Hou, Tingting, She, Xiaodong, Wei, Xiaoyi, She, Fenghua, Gao, Weimin and Kong, Lingxue 2015, Decomposition properties of PVA/graphene composites during melting-crystallization, Polymer degradation and stability, vol. 119, pp. 178-189, doi: 10.1016/j.polymdegradstab.2015.05.011.

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Title Decomposition properties of PVA/graphene composites during melting-crystallization
Author(s) Li, Chengpeng
Hou, Tingting
She, Xiaodong
Wei, Xiaoyi
She, FenghuaORCID iD for She, Fenghua
Gao, WeiminORCID iD for Gao, Weimin
Kong, LingxueORCID iD for Kong, Lingxue
Journal name Polymer degradation and stability
Volume number 119
Start page 178
End page 189
Total pages 12
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015
ISSN 0141-3910
Keyword(s) Decomposition kinetics
Isothermal decomposition
PVA/graphene composites
Summary Abstract The thermal decomposition of PVA and PVA composites during the melting-crystallization process is still unclear due to indistinct changes in chemical compositions. Using graphene as a model, the decomposition properties of PVA and PVA-graphene composites were systematically analyzed under multiple melting-crystallization cycles. And a series of isothermal decomposition experiments around the melting-crystallization temperature were carried out to simulate the corresponding decomposition kinetics. Based on multiple cycle melting-crystallization, the weight loss of PVA and PVA/graphene composites was successfully quantified. Further morphology investigation and chemical structure analysis indicated that the decomposition was non-uniformly distributed, rendering the possibility of crystallization for PVA and PVA/graphene composites after multiple heating-cooling cycles. In addition, isothermal decomposition analysis based on reduced time plot approach and model-free iso-conversional method indicated that Avrami-Eroffev model could well match the decomposition process of the neat PVA and PG-0.3 composite, while the Avrami-Eroffev and first order models could precisely forecast the decomposition of PG-0.9 composite. Both analyses during multiple cycle melting-crystallization and isothermal decomposition demonstrated that graphene served as decomposition accelerator in the whole thermal decomposition process, and particularly the decomposition of neat PVA and PVA/graphene composites was highly related to the band area ratios of C-H and O-H vibrations in Fourier transform infrared (FTIR) spectrum.
Language eng
DOI 10.1016/j.polymdegradstab.2015.05.011
Field of Research 091202 Composite and Hybrid Materials
091006 Manufacturing Processes and Technologies (excl Textiles)
091205 Functional Materials
Socio Economic Objective 861004 Plaster and Plaster Products
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2015, Elsevier
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Document type: Journal Article
Collection: Institute for Frontier Materials
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