Effect of cooling rate on the crystal polymorphism in beta-nucleated isotactic polypropylene as revealed by a combined WAXS/FSC analysis

Alicyn Marie Rhoades, Nichole Wonderling, Anne Gohn, Jason Williams, Daniela Mileva, Markus Gahleitner, René Androsch

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The efficiency of γ-quinacridone to nucleate β-crystal formation in isotactic polypropylene (iPP) at rapid cooling has been evaluated by a combination of fast scanning chip calorimetry (FSC) and wide-angle X-ray scattering (WAXS). For samples with different amount of γ-quinacridone, FSC experiments revealed information about a critical cooling rate above which the crystallization temperature decreases to below 105 °C, that is, to temperatures at which the growth rate of α-crystals is higher than that of β-crystals. Microfocus WAXS analysis was then applied to gain information about the competition of formation of β- and α-crystals in samples prepared at defined cooling conditions at rates up to 1000 K/s in the FSC. For iPP containing 1 and 500 ppm γ-quinacridone, the crystallization temperature is lower than 105 °C on cooling faster about 10 and 70 K/s, respectively, which then on further increase of the cooling rate leads to a distinct reduction of the β-crystal fraction.

Original languageEnglish (US)
Title of host publicationVIII International Conference on "Times of Polymers and Composites"
Subtitle of host publicationFrom Aerospace to Nanotechnology
EditorsAlberto D'Amore, Luigi Grassia, Domenico Acierno
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735413900
DOIs
StatePublished - May 18 2016
Event8th International Conference on Times of Polymers and Composites: From Aerospace to Nanotechnology - Ischia, Naples, Italy
Duration: Jun 19 2016Jun 23 2016

Publication series

NameAIP Conference Proceedings
Volume1736
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other8th International Conference on Times of Polymers and Composites: From Aerospace to Nanotechnology
CountryItaly
CityIschia, Naples
Period6/19/166/23/16

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Rhoades, A. M., Wonderling, N., Gohn, A., Williams, J., Mileva, D., Gahleitner, M., & Androsch, R. (2016). Effect of cooling rate on the crystal polymorphism in beta-nucleated isotactic polypropylene as revealed by a combined WAXS/FSC analysis. In A. D'Amore, L. Grassia, & D. Acierno (Eds.), VIII International Conference on "Times of Polymers and Composites": From Aerospace to Nanotechnology [4949651] (AIP Conference Proceedings; Vol. 1736). American Institute of Physics Inc.. https://doi.org/10.1063/1.4949651