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The dynamic crossover that is reported for the normal mode by varying the molecular weight is clearly revealed by the thermally stimulated depolarization currents results through the temperature location, TMn, of the normal mode peak, the values of the relaxation time at TMn, \u03c4(TMn), and the value of the fragility index of the normal mode, mn. The kinetic features of the glass transition relaxation of polyisoprene have also been determined.<\/jats:p>","DOI":"10.1063\/1.4906542","type":"journal-article","created":{"date-parts":[[2015,1,28]],"date-time":"2015-01-28T18:00:17Z","timestamp":1422468017000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":9,"title":["The segmental and chain relaxation modes in high-<i>cis<\/i>-polyisoprene as studied by thermally stimulated currents"],"prefix":"10.1063","volume":"142","author":[{"given":"Elsa","family":"Mora","sequence":"first","affiliation":[{"name":"Universidade de Lisboa 1 CQE\u2013Centro de Qu\u00edmica Estrutural, , Complexo I, IST, 1049-001 Lisboa, Portugal"}]},{"given":"Ana R.","family":"Br\u00e1s","sequence":"additional","affiliation":[{"name":"Forschungszentrum J\u00fclich 2 J\u00fclich Centre for Neutron Science and Institute for Complex Systems, , 52425 J\u00fclich, Germany"}]},{"given":"Wim","family":"Pyckhout-Hintzen","sequence":"additional","affiliation":[{"name":"Forschungszentrum J\u00fclich 2 J\u00fclich Centre for Neutron Science and Institute for Complex Systems, , 52425 J\u00fclich, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0808-1306","authenticated-orcid":false,"given":"Herm\u00ednio P.","family":"Diogo","sequence":"additional","affiliation":[{"name":"Universidade de Lisboa 1 CQE\u2013Centro de Qu\u00edmica Estrutural, , Complexo I, IST, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4955-5587","authenticated-orcid":false,"given":"Joaquim J.","family":"Moura Ramos","sequence":"additional","affiliation":[{"name":"Universidade de Lisboa 3 CQFM\u2013Centro de Qu\u00edmica-F\u00edsica Molecular and IN\u2013Institute of Nanoscience and Nanotechnology, Instituto Superior T\u00e9cnico, , 1049-001 Lisboa, Portugal"}]}],"member":"317","published-online":{"date-parts":[[2015,1,28]]},"reference":[{"key":"2023073023255342900_c1","doi-asserted-by":"publisher","first-page":"539","DOI":"10.1351\/pac196715030539","volume":"15","year":"1967","journal-title":"Pure Appl. 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