NEUTRON-SCATTERING STUDY OF THE PICOSECOND DYNAMICS OF POLYBUTADIENE AND POLYISOPRENE

被引：200
作者：
ZORN, R
ARBE, A
COLMENERO, J
FRICK, B
RICHTER, D
BUCHENAU, U
机构：
[1] UNIV BASQUE COUNTRY, FAC QUIM, DEPT FIS MAT, E-20080 SAN SEBASTIAN, SPAIN
[2] INST MAX VON LAUE PAUL LANGEVIN, F-38042 GRENOBLE 6, FRANCE
来源：
PHYSICAL REVIEW E | 1995年 / 52卷 / 01期
关键词：
D O I：
10.1103/PhysRevE.52.781
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Neutron time-of-flight data of polybutadiene and polyisoprene in a wide temperature range around the glass transition are reported. The anharmonic part of the spectra is evaluated using a recently developed time domain Fourier transform technique. The results corroborate the recent finding of two different time domains in the dynamics, one above a crossover time of about 2 ps and the other below it. Two different interpretations of the short time behavior are considered, namely a fast Debye regime of the alpha relaxation and a vibrational softening of the boson peak.
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页码：781 / 795
页数：15
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