Melting behavior of cis-polybutadiene crystallized under stress

Authors

  • F. De Candia,

    1. Instituto di Ricerche su Tecnologia dei Polimeri e Reologia C.N.R., Via Toiano 7, 80072 Arco Felice, Napoli, Italy
    Search for more papers by this author
    • Instituto di Ingegneria Chimico-Alimentare, Facoltá di Ingegneria, Universitá di Salerno, 84100 Salerno, Italy.

  • G. Romano

    1. Instituto di Ricerche su Tecnologia dei Polimeri e Reologia C.N.R., Via Toiano 7, 80072 Arco Felice, Napoli, Italy
    Search for more papers by this author

Abstract

Samples of crosslinked cis-polybutadiene were crystallized at different temperature and drawing degree. The melting behavior of the crystallized samples was analyzed detecting the retractive stress as a function of temperature. The experimental melting data were extrapolated to the equilibrium conditions to obtain the thermodynamic melting temperature as a function of the drawing degree. The extrapolated data were analyzed with different theoretical approaches. Results agree with a model in which chain-folding and extended-chain crystallization can coexist, depending on crystallization temperature and drawing degree.

Ancillary