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摘要: 本文在0~4 GPa范围内研究了预压力对硬脂酸晶体的相关场劈裂和固态-熔融态相变过程的影响。通过CH2面内摇摆振动模和'CH2相关场模的强度和频率变化,发现预压力对晶体内的相关场合分子链取向有明显的影响。预压力对硬脂酸的熔点虽然没有影响,但对'CH2模有硬化作用。并且由此出发,对硬脂酸的预熔过程作了讨论。Abstract: The effects of pre-pressure in the range 0~4 GPa on the correlation field splitting and solid state-melt state phase transition of the stearic acid were studied. By observing the change in the spectra intensities and frequencies of CH2 rocking mode and its correlation field component 'CH2, drastic effects of pre-pressure on correlation field splitting and molecular orientation in the crystal were observed. Although effect of pre-pressure on melting point of stearic acid has not been observed, a harden phenomenon of the 'CH2 mode was obtained. From this mechanism of temperature-induced phase transition was discussed
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