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采用乙酸乙酯为环型和线型聚苯乙烯的非良溶剂,确定了Mark-Houwink方程分别为[η]r=1.91×10~(-2)·M~(0.607)和[η]l=4.06×10~(-2)·M~(0.572)。研究了环型和线型聚苯乙烯的激基缔合物的荧光效应。通过稀溶液中环型和线型高分子线团在柔顺性上存在着差异,解释了二者之间在荧光效应方面的差异,并根据实验结果,确定了(I_E/I_M)c→0～M关系式分别为(I_E/I_M)r,c→0=1.91+3.40×10~(-6)M和(I_E/I_M)l.c→0=2.15+3.05×10~(-6)M。
Using the ethyl acetate as the non-good solvent for the ring and linear polystyrene, the Mark-Houwink equations were determined to be [η] r = 1.91 × 10 ~ (-2) · M ~ (0.607) and [η] = 4.06 × 10 ~ (-2) · M ~ (0.572). The fluorescence effect of excimer of cyclic and linear polystyrene was investigated. Differences in flexibility between the two kinds of ring-type and linear-type polymer lumps in dilute solution are explained, and the difference in fluorescence effect between the two is explained. Based on the experimental results, the relationship between (I_E / I_M) c → 0 ~ M The relations are (I_E / I_M) r, c → 0 = 1.91 + 3.40 × 10 -6 M, and (I_E / I_M) lc → 0 = 2.15 + 3.05 × 10 -6 M.