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1. 哈尔滨师范大学物理系
2. 哈尔滨师范大学物理系,哈尔滨,150025
纸质出版日期:2007-07-01
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[1]孙民华,牟洪臣,王玉玺,李德敏,王爱屏,马丛笑,程伟东,王丹,刘佳.小角X射线散射研究石蜡加热过程中的结构变化[J].核技术,2007(07):568-570.
SUN Minhua MOU Hongchen WANG Yuxi LI Demin WANG Aiping MA Congxiao CHENG Weidong WANG Dan LIU Jia. SAXS observation of structural evolution of heated olefin[J]. Nuclear techniques, 2007, (7): 568-570.
采用原位加热
用同步辐射X射线小角散射法研究了石蜡加热软化过程中的微结构变化。石蜡的电子密度回转半径从22℃的11.61nm减至100℃的11.16nm
而均方电子密度均方起伏从22℃的468nm-2升高到100℃的2416nm-2。由此
石蜡变软并非由内部结构单元变小引起
而主要由分子热运动加剧引起。
Structural evolution of olefin during its heating process was observed with SAXS method at Beijing Syn-chrotron Radiation Facility.The mean square fluctuation of electron density increased from 468.5 nm-2 at 22℃ to 2416 nm-2 at 100℃
while the electronic gyration radius decreased from 11.61 nm at 22℃ to 11.16 nm at 100℃.Therefore
the olefin softens as a result of the increased thermal motion of the molecules
rather than the shrinking size of fundamental structural units of olefin.
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