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本文研究了以重量比1:1的苯酚—四氯乙烷溶液为溶剂,正庚烷为萃取剂对聚对/间-苯二甲酸双酚-A酯的两相分级,並用分级得到的各级分通过光散射法测定建立了聚合物在苯酚—四氯乙烷(重量比60:40)和四氯乙烷中的Mark-Houwink方程。得到的结果是: [η]=2.69·10~(-3)·(?)_W0,530 (苯酚-四氯乙烷60:40,30℃) [η]=1.69·10~(-3)·(?)_W0,57 (四氯乙烷,30℃) 用修正的Elias方法,采用阿贝折射仪测定浊点,还确定了在25℃,重量比为22.4:77.6的正庚烷—四氯乙烷溶液为聚合物的θ溶剂。得到了聚合物的无扰链尺寸为: ((?)_O)~(1/2)=1.01·10~(-8)M~(1/2)(厘米)並与应用Stockmayer-Fixman法得到的结果进行了比较,讨论了聚合物分子的流体力学特征。
In this paper, we studied the biphasic fractionation of poly (p- / m-phenylene bisphenol-A) ester with phenol-tetrachloroethane solution of 1: 1 by weight as solvent and n-heptane as extractant The Mark-Houwink equation of the polymer in phenol-tetrachloroethane (weight ratio 60:40) and tetrachloroethane was established by light scattering. The results obtained were as follows: [η] = 2.69 · 10 -3 · (?) _W0,530 (phenol-tetrachloroethane 60:40, 30 ° C) [η] = 1.69 · 10 -3 · (?) _ W0, 57 (tetrachloroethane, 30 ° C) The cloud point was measured with a modified Elias method using an Abbe refractometer and also n-heptane-tetrakis The ethyl chloride solution is theta solvent of the polymer. The unperturbed chain size of the polymer was obtained as follows: ((?) _O) ~ (1/2) = 1.01 · 10 ~ (-8) M ~ (1/2) cm and obtained with Stockmayer-Fixman method The results are compared to discuss the molecular dynamics of polymer molecules.