KINETICS OF RADICAL PROCESSES IN ORGANIC-CRYSTALS DURING HIGH-PRESSURE SHEARING

被引：4

作者：

DADALI, AA ^{[1
]}

LASTENKO, IP ^{[1
]}

KOJUSHNER, MA ^{[1
]}

机构：

[1] NYU,DEPT CHEM,NEW YORK,NY 10003

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1993年 / 102卷 / 02期

关键词：

D O I：

10.1006/jssc.1993.1037

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The kinetic dependencies of radical generation and recombination during shearing under high pressure of an organic polycrystalline compound, arylindandione dimer, were investigated using modified EPR spectroscopy. The radicals were created as a result of dimer splitting at shear deformation. A statistical model of brittle crushing and a semiphenomenological theory of radical kinetics were proposed. The theory describes well the functional dependence of EPR spectral parameters on the shearing angle, shear rate, and pressure, as well as on shearing by impact. Comparison with experimental data enabled us to determine the parameters of the radical kinetics: grain dimensions, multiplicity of grains split during shearing, radical density on the grain surface, and the radical surface diffusion rate constant. The work reveals the broad capabilities of the EPR method in investigating microscopic parameters of destruction of solids by mechanical stresses. © 1993 Academic Press, Inc.

引用

页码：289 / 298

页数：10