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为优化黄原胶(XG)与丙烯酰胺(AM)接枝共聚物(XG-g-AM)的合成工艺,以产品接枝率、接枝效率的回归综合得分为指标,采用响应曲面(RS)法分析了m(AM)∶m(XG)比例、XG浓度和辐射总剂量(60Co-γ为辐射源)对产物接枝参数的影响,并建立了相应的预测模型;同时利用元素分析、红外光谱(FT-IR)和X射线衍射(XRD)法对接枝产物的结构进行了表征。结果表明:AM已成功接枝在XG上,并且当m(AM)∶m(XG)=2.9∶1、XG浓度为9.8 g/L和辐射总剂量为5.9 kGy时,相应产品的接枝率、接枝效率回归综合得分的预测值(19.95)最大;验证了最佳工艺条件下制备的产品接枝率为130.2%,平均接枝效率为80.4%,综合得分为19.78,试验值与预测值吻合较好,说明该模型可以较好地反映综合得分与各影响因素之间的关系。
In order to optimize the synthesis process of XG-g-AM graft copolymer (XG-g-AM), the regression integral score of product grafting rate and grafting efficiency was used as an index. ) Method was used to analyze the influence of the ratio of m (AM): m (XG), the concentration of XG and the total dose of radiation (60Co-γ as the radiation source) on the grafting parameters of the product. Corresponding prediction models were also established. The structure of the grafted product was characterized by FT-IR and X-ray diffraction. The results show that AM has been successfully grafted onto XG, and the grafting yield of the corresponding product at m (AM): m (XG) = 2.9:1, XG concentration of 9.8 g / L and total radiation dose of 5.9 kGy (19.95). The results showed that the grafting yield of the product prepared under the optimal conditions was 130.2%, the average grafting efficiency was 80.4%, the comprehensive score was 19.78, the test value and the predicted value The good agreement indicates that the model can better reflect the relationship between comprehensive score and various factors.