Abstract
Melting kinetics of it-polypropylene crystals has been examined over wide heating rates of 0.6 K min−1−104 K s−1 using a standard DSC and a fast-scan DSC. With fast-scan DSC, we have an access to the melting of crystals obtained at low temperatures, which are susceptible to re-organization at the heating rates applicable with standard DSC. It is clearly discernible that the appearance and disappearance of multiple melting peaks are strongly influenced by the applied heating rates and dependent on the crystallization temperatures. By examining the heating rate dependence of superheating of melting, we have determined the melting points of as-grown crystals formed under wide crystallization temperatures.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Wunderlich B. Macromolecular physics, vol. 3. New York: Academic Press; 1976.
Toda A, Yamada K, Hikosaka M. Superheating of the melting kinetics in polymer crystals: a possible nucleation mechanism. Polymer 2002;43:1667.
Toda A, Hikosaka M. Full deconvolution of the instrumental coefficients in scanning calorimeter of heat flux type. Thermochim Acta. 2005;36:15.
Minakov AA, Adamovsky SA, Schick C. Non-adiabatic thin-film (chip) nanocalorimetry. Thermochim Acta. 2005;432:177.
Minakov AA, Wurm A, Schick C. Superheating in linear polymers studied by ultrafast nanocalorimetry. Eur Phys J E. 2007;23:43.
Hikosaka M, Seto T. The order of the molecular chains in isotactic polypropylene crystals. Polym J. 1973;5:111.
Sato K, Nozaki K, Toda A, Maruyama M, Tagashira K, Maeda Y, Yamamoto T. Ordered structure formation of 1 and 2 forms of isotactic polypropylene IV. Polym Prep Jpn. 2012;61:778.
Yamada K, Hikosaka M, Toda A, Yamazaki S, Tagashira K. Equilibrium melting temperature of isotactic polypropylene with high tacticity. 1. Determination by differential scanning calorimetry. Macromolecules. 2003;36:4790.
Yamada K, Hikosaka M, Toda A, Yamazaki S, Tagashira K. Equilibrium melting temperature of isotactic polypropylene with high tacticity. 2. Determination by optical microscopy. Macromolecules. 2003;36:4802.
van Herwaarden S, Iervolino E, van Herwaarden F, Wijffels T, Leenaers A, Mathot V. Design, performance and analysis of thermal lag of the UFS1 twin-calorimeter chip for fast scanning calorimetry using the Mettler-Toledo Flash DSC 1. Thermochim Acta. 2011;522:46.
Toda A, Kojima I, Hikosaka M. Melting kinetics of polymer crystals with an entropic barrier. Macromolecules. 2008;41:120.
Schawe JEK, Strobl GR. Superheating effects during the melting of crystallites of syndiotactic polypropylene analysed by temperature-modulated differential scanning calorimetry. Polymer. 1998;39:3745.
Ren Y, Ma A, Li J, Jiang X, Ma Y, Toda A, Hu W. Melting of polymer single crystals studied by dynamic Monte Carlo simulations. Euro Phys J E. 2010;33:189.
Toda A, Tomita C, Hikosaka M, Saruyama Y. Melting of polymer crystals observed by temperature modulated DSC and its kinetic modelling. Polymer. 1998;39:5093.
Acknowledgments
One of the authors (AT) wishes to thank Dr. H. Fadi (Mettler-Toledo K.K.) for providing the access to FlashDSC1TM. This study was supported by KAKENHI (Grant-in-Aid for Scientific Research) from the Ministry of Education, Culture, Sports, Science and Technology of Japan.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Toda, A., Taguchi, K., Sato, K. et al. Melting kinetics of it-polypropylene crystals over wide heating rates. J Therm Anal Calorim 113, 1231–1237 (2013). https://doi.org/10.1007/s10973-012-2914-1
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10973-012-2914-1