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Characterization and non-isothermal crystallization behavior of biodegradable poly(ethylene sebacate)/SiO_2 nanocomposites

Mohsen-Nia, M. and Memarzadeh, M. R. (2013) Characterization and non-isothermal crystallization behavior of biodegradable poly(ethylene sebacate)/SiO_2 nanocomposites. Polymer Bulletin, 70 (8). pp. 2471-2491. ISSN 0170-0839. doi:10.1007/s00289-013-0967-3.

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Poly(ethylene sebacate) (PESeb) and PESeb/silica nanocomposites (PESeb/SiO_2) were prepared by in situ polymerization from the direct esterification of ethylene glycol with sebacic acid in the presence of proper amounts of silica nanoparticles. The non-isothermal crystallization behavior of PESeb/SiO_2 nanocomposites has been studied using different theoretical equations such as Avrami, Ozawa and combined Avrami and Ozawa equations. It is found that the addition of nanoparticles of SiO_2 influenced the mechanism of nucleation and the growth of PESeb crystallites. Also, the nanocomposites show a higher Avrami value than the neat PESeb, implying a more complex crystallization configuration. Moreover, the combined Avrami and Ozawa equation can successfully describe the crystallization model under the non-isothermal crystallization. The crystallization activation energies, E_a, calculated from ‘‘Kissinger’s equation’’ have shown that the synthesized PESeb/SiO_2 nanocomposites have lower energy than the neat PESeb, reflecting the much lower energy barrier for the rapid heterogeneous nucleation.

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Additional Information:© 2013 Springer-Verlag Berlin Heidelberg. Received: 9 January 2013; Accepted: 22 April 2013; Published online: 4 June 2013.
Subject Keywords:Nanocomposite; Silica; Non-isothermal crystallization; Activation energy
Issue or Number:8
Record Number:CaltechAUTHORS:20130912-134714921
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41297
Deposited On:12 Sep 2013 21:52
Last Modified:10 Nov 2021 04:28

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