Fluorescence polarization measurements of orientation in labeled polyisoprene networks
Fluorescence polarization measurements of orientation in labeled polyisoprene networks
复制标题
标记聚异戊二烯网络中取向的荧光偏振测量
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
L. Monnerie
中科院分区：
文献类型：
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作者：
J. Jarry;L. Monnerie
利用荧光偏振技术测量了拉伸聚异戊二烯网络中的链段取向。在拉伸过程中，同时记录化学结合的荧光标记的应力和取向。观察到了与经典橡胶弹性理论的两个偏离：(I)干网络的额外取向，这是通过假设链段之间存在弱向列式相互作用来解释的；(Ii)在高伸长率时取向饱和，这可能是由于局部构象变化所致。
Fluorescence polarization was used to measure segmental orientation in stretched polyisoprene networks. Stress and orientation of chemically bonded fluorescent labels were simultaneously recorded during stretching. Two deviations from the classical theory of rubber elasticity were observed: (i) an extra orientation of dry networks, which was interpreted by assuming the existence of weak nematiclike interactions between segments, and (ii) a saturation of orientation at high elongation which could be due to local conformational changes.