F
Francisco J. Baltá Calleja
Researcher at Spanish National Research Council
Publications - 29
Citations - 587
Francisco J. Baltá Calleja is an academic researcher from Spanish National Research Council. The author has contributed to research in topics: Crystallization & Lamellar structure. The author has an hindex of 9, co-authored 29 publications receiving 560 citations.
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Journal ArticleDOI
Broadband ac conductivity of conductor-polymer composites
TL;DR: In this article, the electrical conductivity of a composite model system formed by highly structured carbon black (CB) filled, within an amorphous polymer, poly~ethylene terephtalate! composite is studied.
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Crystallization of oriented amorphous poly(ethylene terephthalate) as revealed by X-ray diffraction and microhardness
Tsutomu Asano,Francisco J. Baltá Calleja,Araceli Flores,Motonori Tanigaki,Mohammad Forhad Mina,Chie Sawatari,Hideyuki Itagaki,Hiroshi Takahashi,Ichiro Hatta +8 more
TL;DR: In this article, the structural changes occurring when amorphous cold-drawn poly(ethylene terephthalate) films are annealed at different temperatures (50°C-240°C) for different annealing times (10−10 4 ǫs) were investigated by means of X-ray diffraction and microhardness techniques.
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Micromechanical mechanisms for toughness enhancement in β-modified polypropylene
Sven Henning,Rameshwar Adhikari,G. H. Michler,Francisco J. Baltá Calleja,József Karger-Kocsis +4 more
TL;DR: In this article, isotactic polypropylene (iPP) was compared with respect to their semicrystalline morphology and the resulting micromechanical mechanisms and it was shown that the specific nanostructure (lamellar arrangement) causes significant changes in the mechanical behaviour of the materials.
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Aromatic polymers obtained by precipitation polycondensation, 2. Synthesis of poly(ether ketone ether ketone ketone) (PEKEKK)
Mikhail G. Zolotukhin,Daniel R. Rueda,Francisco J. Baltá Calleja,Marta Bruix,M. E. Cagiao,Anna Bulai,Natalia G. Gileva +6 more
TL;DR: In this paper, a high molecular weight, linear aromatic poly(ether ketone ether ketone ketone) (PEKEKK) has been synthesized by electrophilic Friedel-Crafts acylation condensation of 1,4-diphenoxybenzophenone with terephthaloyl chloride.
Journal ArticleDOI
Influence of morphology on the microhardness of poly(ethylene naphthalene-2,6-dicarboxylate)
Daniel R. Rueda,Armanda Viksne,Laimonis Malers,Francisco J. Baltá Calleja,Hans Gerhard Zachmann +4 more
TL;DR: The microhardness of poly(ethylene naphthalene-2,6-dicarboxylate) with a wide range of crystallinities, spherulitic morphologies and different lamellar periodicities has been determined as discussed by the authors.