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用裂介一气相色谱法测定了衣康酸二甲酯-苯乙烯共聚物的组成。用不同组成的该共聚物样品(从紫外分析求得),通过它们裂介气相色谱图的两单体峰面积比,求得定量工作曲线。再用该曲线对共聚物其他样品的裂介色谱图中两单体峰面积比求其组成,得到较一致的结果。用均聚物的混合物(已知组成)在相同条件下得不到同一斜率的工作曲线。在程序升温中,用线性升温法可得较满意的重现性。
The composition of dimethyl itaconate-styrene copolymer was determined by split-gas chromatography. The copolymer samples with different compositions (obtained from UV analysis) were used to determine the quantitative working curve by the ratio of the peak areas of two monomers in the gas chromatogram. The curve was used to calculate the composition ratio of the two monomer peak areas in the split-chromatogram of the other samples of the copolymer to obtain a more consistent result. With a mixture of homopolymers (known composition) under the same conditions can not get the same slope of the working curve. In the process of warming, with linear heating method can be more satisfactory reproducibility.