Melting behavior, crystallization kinetics, and crystal structure of poly(2-hydroxyethoxybenzoate) (Articolo in rivista)

Type
Label
  • Melting behavior, crystallization kinetics, and crystal structure of poly(2-hydroxyethoxybenzoate) (Articolo in rivista) (literal)
Anno
  • 2002-01-01T00:00:00+01:00 (literal)
Alternative label
  • Finelli, L.; Siracusa, V.; Lotti, N.; Munari, A.; Gazzano, M (2002)
    Melting behavior, crystallization kinetics, and crystal structure of poly(2-hydroxyethoxybenzoate)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Finelli, L.; Siracusa, V.; Lotti, N.; Munari, A.; Gazzano, M (literal)
Pagina inizio
  • 1354 (literal)
Pagina fine
  • 1362 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 40 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • Studio delle proprietà della cinetica di cristallizzazione, della struttura e delle caratteristiche di fusione del poli(2-idrossibenzoato) (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto per la Sintesi Organica e la Fotoreattività -CNR- Bologna Dipartimento di Chimica Applicata e Sc. Dei Materiali, Università di Bologna (literal)
Titolo
  • Melting behavior, crystallization kinetics, and crystal structure of poly(2-hydroxyethoxybenzoate) (literal)
Abstract
  • The melting behavior and crystn. kinetics of poly(2-hydroxyethoxybenzoate) (PHEBA) were investigated with differential scanning calorimetry and hot-stage optical microscopy. The obsd. multiple endotherms, commonly displayed by polyesters, were influenced by the crystn. temp. By the application of the Hoffman-Weeks method to the melting temps. of isothermally crystd. samples, a value of 232°C was obtained for the equil. melting temp. Isothermal crystn. kinetics were analyzed according to Avrami's treatment. Values of Avrami's exponent n close to 3 were obtained, independently of the crystn. temp., in agreement with a crystn. process originating from predetd. nuclei and characterized by three-dimensional spherulitic growth. In fact, space-filling banded spherulites were obsd. by hot-stage optical microscopy at all crystn. temps. explored, with the band spacing increasing with increasing crystn. temp. The rate of crystn. became lower as the crystn. temp. increased as usual at low undercooling, with the crystn. process controlled by nucleation. The equil. heat of fusion was detd. by differential scanning calorimetry and wide-angle X-ray scattering measurements. Finally, the crystal phase of PHEBA was investigated with wide-angle X-ray scattering, and a triclinic unit cell was hypothesized. (literal)
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