Simultaneous crystallization and decomposition of PVA/MMT composites during non-isothermal process

Li, Chengpeng, Hou, Tingting, Vongsvivut, Jitraporn, Li, Yongzhen, She, Xiaodong, She, Fenghua, Gao, Weimin and Kong, Lingxue 2015, Simultaneous crystallization and decomposition of PVA/MMT composites during non-isothermal process, Thermochimica acta, vol. 618, pp. 26-35, doi: 10.1016/j.tca.2015.09.009.

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Title Simultaneous crystallization and decomposition of PVA/MMT composites during non-isothermal process
Author(s) Li, Chengpeng
Hou, Tingting
Vongsvivut, Jitraporn
Li, Yongzhen
She, Xiaodong
She, FenghuaORCID iD for She, Fenghua
Gao, WeiminORCID iD for Gao, Weimin
Kong, LingxueORCID iD for Kong, Lingxue
Journal name Thermochimica acta
Volume number 618
Start page 26
End page 35
Total pages 10
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015-10-20
ISSN 0040-6031
Keyword(s) Science & Technology
Physical Sciences
Chemistry, Analytical
Chemistry, Physical
Poly(vinyl alcohol)
Montmorillonite clay
Summary Decomposition of poly(vinyl alcohol)/montmorillonite clay (PVA/MMT) composites during melting-crystallization was experimentally confirmed by morphology and molecular structure changes. In particular, FTIR spectra show the shift of O-H stretching band as well as enhanced intensities of C-O stretching and CH2 rocking vibrational modes. Furthermore, Raman deconvolution indicates that C-H wagging, CH2-CH wagging, CH-CO bending and CH2 wagging modes in amorphous domains were all decreased greatly. Moreover, this decomposition leads to decreased melting enthalpy, melting point, crystallization enthalpy and crystallization temperature. Crystallization analysis shows that the MMT incorporated slows down the crystallization process in the PVA matrix regardless of the nucleation capability of MMT. Despite the severe decomposition, the crystallization kinetics still corroborated well with common classical models. As a result, molecular structure changes and crystallization retardation observed in this study clearly indicate the strong effects of the thermal degradation on the non-isothermal crystallization of PVA/MMT composites.
Language eng
DOI 10.1016/j.tca.2015.09.009
Field of Research 030301 Chemical Characterisation of Materials
0301 Analytical Chemistry
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier
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Document type: Journal Article
Collection: Institute for Frontier Materials
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