Confined dynamics in poly(ethylene terephthalate): a coherent and incoherent neutron scattering study

6th Meeting of the Spanish Neutron Scattering Association

Sanz, Alejandro^1 ; Nogales, Aurora^1 ; Puente-Orench, Inés^2,3 ; García-Gutiérrez, Mari-Cruz^1 ; Campo, Javier^2 ; Haussler, Wolfgang^4 ; Soccio, Michelina^5 ; Lotti, Nadia^5 ; Munari, Andrea^5 ; Ezquerra, Tiberio A.^1

Instituto de Estructura de la Materia, IEM-CSIC, Serrano 121, Madrid 28006, Spain^1

Institut Laue-Langevin, BP 156-38042 Grenoble Cedex 9, France^2

Instituto de Ciencia de Materiales de Aragón, ICMA-CSIC, Pedro Cerbuna 12, Zaragoza 50009, Spain^3

Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II), Garching, Germany^4

Dipartimento di Ingegneria Civile, Ambientale e Dei Materiali, Universit A di Bologna, Via Terracini 28, 40131 Bologna, Italy^5

关键词: Amorphous polymers;    Confined dynamics;    Incoherent neutron;    Incoherent neutron scatterings;    Neutron spin echo;    Quasi elastic neutron scattering;    Semi-crystalline polymer;    Theoretical modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/549/1/012011/pdf
DOI  :  10.1088/1742-6596/549/1/012011

来源: IOP

【 摘 要 】

We show that the combination of dielectric relaxation with neutron spin echo and incoherent neutron backscattering measurements performed in deuterated and protonated poly(ethylene terephthalate) suggests that the intrinsic dynamics of semicrystalline polymers occurs in an homogeneous scenario, similar to that valid to describe the dynamics of totally amorphous polymers. The quasielastic neutron scattering data are satisfactorily described by a theoretical model that considers that the proton mobility follows a random jump-diffusion in a restricted environment.