Secondary relaxation in two engineering thermoplastics by neutron scattering and dielectric spectroscopy

被引：8

作者：

Arrese-Igor, S

Arbe, A

Alegría, A

Colmenero, J

Frick, B

机构：

[1] Univ Basque Country, Dept Fis Mat, E-20080 San Sebastian, Spain

[2] Univ Basque Country, EHU, CSIC, Unidad Fis Mat, E-20080 San Sebastian, Spain

[3] Donostia Int Phys Ctr, E-20080 San Sebastian, Spain

[4] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2002年 / 74卷 / Suppl 1期

关键词：

D O I：

10.1007/s003390201851

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a preliminary investigation of the dynamics of glassy polycarbonate (PC) and polysulfone (PSF) by means of quasielastic neutron scattering and dielectric spectroscopy. Whereas the consideration of pure phenylene ring pi-flips is enough to explain the momentum-transfer (Q) dependence of the inelastic intensity measured for PSF, in the case of PC the Q dependence of both the coherent and the incoherent scattering functions reveal the existence in this polymer of some more complex motion of the phenylene ring. On the other hand, the similarity of the energy landscapes deduced from the different techniques points to a closely related molecular origin for all the relaxation/motions observed.

引用

页码：S454 / S456

页数：3

共 19 条

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