NDLI: Crystallization kinetics of polyurethane nanocomposites

Content Provider	Springer Nature Link
Author	Gupta, Y. N. Abbas, S. M. Sharma, R. B. Setua, D. K.
Copyright Year	2014
Abstract	Nanocomposites of the segmented polyurethane (SPU) polymer containing different grades of Cloisite$^{®}$ nanoclay at 3 mass% loading have been prepared. The morphology of the prepared nanocomposites has been viewed through scanning electron microscope combined with energy dispersive X ray for the confirmation of the nanocomposite formation. Their non-isothermal crystallization kinetics have been investigated by applying modified Avrami and combined Avrami–Ozawa equations at four different cooling rates using a modulated differential scanning calorimeter. The crystallization parameters e.g., peak temperature (T $_{p}$), associated enthalpy (ΔH), etc., have been calculated. It has been observed that the addition of nanoclay into SPU accelerates the rate of nucleation and thereby, growth of crystallization in SPU. The Avrami exponent ‘n’ has shown two dimensional growth, while the rate constant ‘Z $_{c}$’ indicates an increase in the crystallization rate with increasing rate of cooling. The activation energy of the crystallization process has been calculated using Kissinger method. The glass transition temperature has also been estimated using thermomechanical analyzer, and the nanocomposites show superiority over the neat SPU.
Starting Page	1393
Ending Page	1405
Page Count	13
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	119
Issue Number	2
e-ISSN	15882926
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-11-29
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nanoclay Cloisite Segmented polyurethane Polymer nanocomposites Crystallization kinetics Physical Chemistry Analytical Chemistry Polymer Sciences Inorganic Chemistry Measurement Science and Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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