Confined dynamics in poly(ethylene terephthalate): a coherent and incoherent neutron scattering study
Confined dynamics in poly(ethylene terephthalate): a coherent and incoherent neutron scattering study
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聚对苯二甲酸乙二醇酯的受限动力学：相干和非相干中子散射研究
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
T. Ezquerra
中科院分区：
文献类型：
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作者：
A. Sanz;A. Nogales;I. Puente;M. García;J. Campo;W. Haussler;M. Soccio;N. Lotti;A. Munari;T. Ezquerra
我们表明，在氘化和质子化聚对苯二甲酸乙酯中进行的介电弛豫与中子自旋回波和非相干中子后向散射测量的结合表明，半结晶聚合物的内在动力学发生在均匀的情况下，类似于描述完全非晶聚合物的动力学。准弹性中子散射数据被一个理论模型满意地描述，该模型考虑了质子迁移率在受限环境下遵循随机跳跃扩散。
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.