摘要
测量了聚合度由５０～８２４的二甲基硅油的频域和时域低温介电谱，其结果和聚合度几乎无关．在－１２０℃的玻璃化转变中频域损耗只有一个小峰，但时域慢介电常数却出现显著的强峰，由分子的螺旋结构解释了实验结果．
The frequency and time domain dielectric spectra of polydimethylsiloxane of polymerization degree 50 to 824 are measured in low temperature.The results are independent of polymerization degree.In glass transition near -120 ℃ the frequency loss is shown to present a peak;and the time domain slow dielectric constant presents a higher peak in the same temperature.The results are explained using the screwed structures of molecules.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
1998年第3期68-71,共4页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
中山大学科研基金
关键词
二甲基硅油
介电谱
慢极化效应
玻璃化转变
polydimethylsiloxane,dielectric spectroscopy,slow polarization effect
