【作者】 林青松； 朱静安；

【Author】 LinQing-song Zhu Jingan(School of Chemical Enginearing,Dalian University of Technology,158 Zhong Shah rod,Dalian,11B012 P.R.China)

【机构】 大连理工大学化工学院；

【摘要】 <正>文章利用电子自旋探针技术研究了云母改性PVC的链段热运动行为。测定了用扩散法固定于聚合物基块非结晶相中的电子自旋探针分子HONO在不同温度时的ESR最大谱宽2A′-(See Fig.1),同时测定了上述HONO在77K时的刚性极限谱,测得最大谱宽2A-为6.86mT.(Calso see.Fig.1)。考查更多还原

【Abstract】 Electron spin probe technologe is used to study segmental motion behavires of parlatotic mica/PVC and Mica/PVC.It have been determined that the largest widths 2A（?）of ESR spectrium of HONO^* which was adhared to polymer matrixes in various temperature（see Fig.1）.Simultaneously,rigidity limited ESR of the HONO was also measured at 77K,and its largest width 2A（?）is 6.86mT.In addition,the glass-transition temperatures(T_50G)of the various PVC samples were obtained by means of 2A（?）～T curves.The spin rotational correlation timesτ_R have been calculated by the relationthip ofτ_R=a（1-S）^b, where s=2A（?）/2A（?）and a and b were property constantz.The fact of theτ_R is ca.10^-8S would shown slower rotational move range of PVC segmental.The apparent active energies of the segmental motion of PVC is shown in Fig.2.更多还原