The study of IR MPD of HCIC=CBCI2H molecule by CO2.-laser is presented. We provide experimental
results showing high degree of fragmentation of this molecule (down to elementary boron) during
nonequilibrium laser induced radical bimolecular reactions.
The behavior ofelastic modulus related with strain amplitude is studied. It was found that modulus behaves softening when internal friction exhibits normal amplitude-dependent effects, while increases slightly with the appearance of anomalously amplitude-dependent effect. With the decrease of frequency of measurement, the variation of modulus with amplitude becomes small. A trial for obtaining information from amplitude internal fiiction peak was made on the basis of Debye equations.
PrlCS: 61.70. LeAs is known, elastic modulus plays an important role in internal friction study of materials. With the aid of the behavior of elastic modulus, one can resolve an internal friction peak, make a judgement on internal friction source such as phase transition and so on. In the case of a linear relaxation process, modulus obeys Debye equation
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