The crystal structure and hard elasticity of the fibers were analyzed by differential scanning calorimeter(DSC),wide and small-angle X-ray scattering(WAXS and SAXS) and tensile experiment.
研究了熔融纺丝法制备聚偏氟乙烯(PVDF)纤维的工艺条件,并采用示差扫描量热仪(DSC)、广角和小角X-射线散射仪(WAXS和SAXS)以及力学试验分析了所得纤维的结晶结构和硬弹性。
Formation of hard elasticity of polypropylene hollow fiber were studied.
通过应力场下聚丙烯熔体结晶制备出硬弹性聚丙烯中空纤维 。
The hard elasticity of polypropylene hollow fiber can be obtained on crystallization under high stress after heat treatment.
应力场下聚丙烯熔体的结晶与硬弹性的形成胡继文＊孙友德许耀光岑美柱（中国科学院广州化学研究所广州５１０６５０）关键词聚丙烯，硬弹性，应力导致结晶１９９６－１２－２０收稿，１９９７－０５－２０修回研究表明，具有硬弹性的聚合物形态的获得最关。
An advantage of Galerkin method was that, for a given trial function, the residuals of the dynamic von Karman partial differential equations could be eliminated easily, thereby the governing equation of an annular thin plate for forced vibration, namely the hard-spring type of Duffing equation, could be obtained.
为研究环形薄圆板非线性振动特性,用伽辽金法消除动态卡门偏微分方程的残值,推导出了环形薄圆板的受迫振动控制方程,即硬弹簧型达芬方程;用KBM法求解达芬方程,定性地探讨了边界条件、阻尼比、外激振力和内外半径比对环形薄圆板振动的影响,得到了4种边界条件下共振时激起的振幅均随半径比或阻尼比的增大而减少的结论;取外激振力作为控制参数,进行理论分析和数值仿真,发现随着外激振力的增大,动力系统从围绕1个焦点的周期运动转变成围绕2个焦点的周期运动。