【摘要】 本文以保留系统的宏观特性为基本原则,从用动力学方法处理非稳态相转变入手,在物理化学基础上,建立了描述液晶相转变的动力学方程,提出了动力学意义上的相转变级数参数,推导出相转变级数的理论公式及参数的变化范围,丹卉将其应用于一新的聚合物体系,获得了该体系各聚合物加热过程中所经历相态的动力学相转变级数。更多还原

【Abstract】 A kinetic approach to phase transition of liquid crystalline polymers was deduced. On the basis of physical chemistry, a kinetic equation concerned the phase transition of liquid crystalline polymers was established, and a new kinetic parameter of transition order was proposed. Hence the quantitative determination of the order of phase transition was obtained. In addition, the kinetic approach was applied to a new series of polymer systems, and the kinetic order of phase transition of the polymers was decided.It is concluded that the clearing transition is of first order, and the smectic-smectic transition second order, while the order of melting and solid-solid transition varies with the polymer structure.更多还原